/* ========================================
   CALCULADORA DE MATERIALES EL SALVADOR
   Premium Construction Calculator
   Design System & Styles
   ======================================== */

/* === CSS Variables === */
:root {
    /* Colors - Professional Blue Palette */
    --color-primary: #1e40af;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1e3a8a;
    --color-accent: #0ea5e9;
    --color-accent-light: #38bdf8;
    
    /* Neutrals */
    --color-bg-main: #fafbfc;
    --color-bg-card: #ffffff;
    --color-bg-elevated: #f8fafc;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    
    /* Text */
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94a3b8;
    --color-text-inverse: #ffffff;
    
    /* PRO Section */
    --color-pro-bg: #0f172a;
    --color-pro-accent: #fbbf24;
    --color-pro-border: #1e293b;
    
    /* Typography */
    --font-display: 'DM Serif Display', serif;
    --font-body: 'Libre Franklin', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 2px 8px rgba(15, 23, 42, 0.06), 0 0 0 1px rgba(15, 23, 42, 0.04);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Transitions */
    --transition-base: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset & Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg-main);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* === Navigation === */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-light);
    transition: var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 0.5rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 1;
    min-width: 0;
}

.brand-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.brand-logo {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.01em;
}

.brand-country {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    position: relative;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-base);
    padding: var(--space-xs) 0;
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
}

.pro-link {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.lock-icon {
    font-size: 0.75rem;
    opacity: 0.7;
}

.btn-login {
    padding: 0.625rem 1.25rem;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-bg-card);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-login:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-primary-light);
    transform: translateY(-1px);
}

.login-container {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}

.btn-admin-secret {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-text-tertiary);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-base);
    opacity: 0.3;
}

.btn-admin-secret:hover {
    background: var(--color-bg-elevated);
    color: var(--color-primary);
    opacity: 1;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: var(--transition-base);
}

/* === Hero Section === */
.hero {
    position: relative;
    padding: var(--space-3xl) 0;
    min-height: 90vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-image: url('hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-background::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(15, 23, 42, 0.92) 0%,
        rgba(30, 41, 59, 0.88) 50%,
        rgba(15, 23, 42, 0.92) 100%
    );
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.3;
    z-index: 1;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse at top left,
        rgba(251, 191, 36, 0.15) 0%,
        rgba(59, 130, 246, 0.1) 40%,
        transparent 70%
    );
    z-index: 2;
}

.hero-container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1rem;
    background: rgba(251, 191, 36, 0.15);
    border: 1px solid rgba(251, 191, 36, 0.3);
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #fbbf24;
    margin-bottom: var(--space-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.6s ease-out;
    backdrop-filter: blur(10px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #fbbf24;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 0 10px #fbbf24;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.1); }
}

.hero-title {
    font-family: 'Libre Franklin', sans-serif;
    font-size: 3.5rem;
    line-height: 1.1;
    font-weight: 800;
    color: white;
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease-out 0.1s both;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
    letter-spacing: -0.02em;
}

.highlight {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-style: italic;
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease-out 0.2s both;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.3);
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 1rem 2rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-inverse);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-md);
    width: fit-content;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-primary .arrow {
    font-size: 1.25rem;
    transition: var(--transition-base);
}

.btn-primary:hover .arrow {
    transform: translateX(4px);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
}

.visual-card {
    position: absolute;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    transition: var(--transition-smooth);
}

.visual-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-1 {
    top: 10%;
    left: 5%;
    animation: float 6s ease-in-out infinite;
}

.card-2 {
    top: 40%;
    right: 10%;
    animation: float 6s ease-in-out 2s infinite;
}

.card-3 {
    bottom: 10%;
    left: 20%;
    animation: float 6s ease-in-out 4s infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.card-icon {
    font-size: 3rem;
}

.card-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.visual-blueprint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 20px,
            var(--color-border-light) 20px,
            var(--color-border-light) 21px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 20px,
            var(--color-border-light) 20px,
            var(--color-border-light) 21px
        );
    border-radius: var(--radius-2xl);
    opacity: 0.4;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === Calculators Section === */
.calculators-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-main);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.75rem;
    font-weight: 400;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}

.calculators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--space-lg);
}

.calculator-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
    transition: var(--transition-smooth);
}

.calculator-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-header {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border-light);
}

.card-icon-large {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg-card));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.card-title-group {
    flex: 1;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.card-description {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

.card-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.input-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.input-field {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    color: var(--color-text-primary);
    background: var(--color-bg-elevated);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.input-field:focus {
    outline: none;
    border-color: var(--color-primary-light);
    background: var(--color-bg-card);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.input-field::placeholder {
    color: var(--color-text-tertiary);
}

.input-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    margin-top: 0.25rem;
    font-style: italic;
}

/* Checkbox Group */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    transition: var(--transition-base);
}

.checkbox-label:hover {
    color: var(--color-text-primary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.btn-calculate {
    margin-top: var(--space-sm);
    padding: 1rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-inverse);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-calculate:active {
    transform: translateY(0);
}

.btn-icon {
    font-size: 1.25rem;
}

/* Results */
.results-container {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-header {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.result-item:last-child {
    border-bottom: none;
}

.result-label {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.result-value {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-primary);
}

/* === PRO Section === */
.pro-section {
    position: relative;
    padding: var(--space-3xl) 0;
    background: linear-gradient(180deg, var(--color-pro-bg) 0%, #1e293b 100%);
    overflow: hidden;
}

.pro-background {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.pro-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(251, 191, 36, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(14, 165, 233, 0.05) 0%, transparent 50%);
}

.pro-content {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
}

/* PRO Header */
.pro-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.savings-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.625rem 1.25rem;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.2), rgba(251, 191, 36, 0.1));
    border: 1.5px solid rgba(251, 191, 36, 0.4);
    border-radius: 100px;
    margin-bottom: var(--space-lg);
}

.savings-icon {
    font-size: 1.25rem;
}

.savings-text {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-pro-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pro-title {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 400;
    color: var(--color-text-inverse);
    margin-bottom: var(--space-sm);
}

.pro-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Main Features - Large Cards */
.pro-features-main {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.pro-feature-main {
    position: relative;
    padding: var(--space-xl);
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--color-pro-border);
    border-radius: var(--radius-xl);
    transition: var(--transition-smooth);
}

.pro-feature-main.featured {
    border-color: var(--color-pro-accent);
    background: rgba(251, 191, 36, 0.05);
}

.pro-feature-main:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

.feature-badge-main {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-pro-accent);
    color: var(--color-text-primary);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.feature-icon-main {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
}

.feature-title-main {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-inverse);
    margin-bottom: var(--space-sm);
}

.feature-description-main {
    font-size: 1rem;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.feature-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.8);
}

.item-icon {
    color: var(--color-pro-accent);
    font-weight: 700;
    flex-shrink: 0;
}

/* Secondary Features */
.pro-features-secondary {
    margin-bottom: var(--space-2xl);
}

.secondary-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-inverse);
    text-align: center;
    margin-bottom: var(--space-lg);
}

.secondary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
}

.secondary-feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-pro-border);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.secondary-feature:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(251, 191, 36, 0.3);
}

.secondary-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.secondary-content h4 {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-text-inverse);
    margin-bottom: 0.25rem;
}

.secondary-content p {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

/* Pricing */
.pricing-container {
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.pricing-card {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--color-pro-accent);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.pricing-header {
    padding: var(--space-xl);
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.15), rgba(251, 191, 36, 0.05));
    border-bottom: 1px solid rgba(251, 191, 36, 0.3);
    text-align: center;
}

.pricing-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: var(--color-pro-accent);
    color: var(--color-text-primary);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.price-main {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
    margin-bottom: var(--space-sm);
}

.price-currency {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-pro-accent);
}

.price-amount {
    font-size: 4.5rem;
    font-weight: 800;
    color: var(--color-text-inverse);
    line-height: 1;
}

.price-period {
    font-size: 1rem;
    color: var(--color-text-tertiary);
    margin-left: 0.5rem;
}

.price-old {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.strikethrough {
    font-size: 1.25rem;
    color: var(--color-text-tertiary);
    text-decoration: line-through;
}

.discount-badge {
    padding: 0.25rem 0.75rem;
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #fca5a5;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 100px;
    text-transform: uppercase;
}

.pricing-body {
    padding: var(--space-xl);
}

.pricing-value {
    text-align: center;
    padding: var(--space-md);
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.value-label {
    font-size: 0.9375rem;
    color: var(--color-text-inverse);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.pricing-features li {
    font-size: 0.9375rem;
    color: var(--color-text-inverse);
    padding: var(--space-xs) 0;
}

.btn-pro {
    position: relative;
    width: 100%;
    padding: 1.25rem 2.5rem;
    font-family: var(--font-body);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-primary);
    background: var(--color-pro-accent);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-smooth);
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(251, 191, 36, 0.3);
    margin-bottom: var(--space-md);
}

.btn-pro:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(251, 191, 36, 0.4);
}

.btn-shimmer {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    to {
        left: 100%;
    }
}

.guarantee {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.3);
    border-radius: var(--radius-md);
    align-items: flex-start;
}

.guarantee-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.guarantee-text {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.5;
}

.guarantee-text strong {
    color: var(--color-text-inverse);
}

/* Coming Soon Notice */
.coming-soon-notice {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: rgba(14, 165, 233, 0.1);
    border: 1.5px solid rgba(14, 165, 233, 0.3);
    border-radius: var(--radius-lg);
    text-align: center;
}

.notice-icon {
    font-size: 1.5rem;
}

.notice-text {
    font-size: 0.9375rem;
    color: var(--color-text-inverse);
}

.notice-text strong {
    color: var(--color-accent-light);
}

/* === Footer === */
.footer {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0 0;
}

.footer-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-border-light);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.footer-tagline {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    max-width: 400px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-heading {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.footer-link {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-base);
}

.footer-link:hover {
    color: var(--color-primary);
}

.footer-bottom {
    padding: var(--space-lg) 0;
}

.footer-bottom-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copyright,
.footer-credit {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

.credit-highlight {
    font-weight: 600;
    color: var(--color-primary);
}

/* === Loading Overlay === */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    flex-direction: column;
    gap: var(--space-md);
}

.loading-overlay.active {
    display: flex;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-inverse);
}

/* === Admin Login Modal === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: var(--space-md);
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    width: 100%;
    max-width: 400px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: slideDown 0.3s ease-out;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border-light);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-text-tertiary);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-base);
}

.modal-close:hover {
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
}

.modal-body {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.error-message {
    padding: var(--space-sm);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-md);
    color: #ef4444;
    font-size: 0.875rem;
}

/* === Admin Dashboard === */
.admin-dashboard {
    min-height: 100vh;
    background: var(--color-bg-main);
    padding-bottom: var(--space-2xl);
}

.admin-header {
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg) 0;
    margin-bottom: var(--space-2xl);
}

.admin-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.admin-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
    border-radius: var(--radius-lg);
}

.admin-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.admin-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

.btn-logout {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.625rem 1.25rem;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-inverse);
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-logout:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.stat-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

/* Admin Section */
.admin-section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.section-header-admin {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border-light);
}

.section-header-admin h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.btn-refresh {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-refresh:hover {
    background: var(--color-bg-card);
    border-color: var(--color-primary-light);
}

/* Table */
.table-container {
    overflow-x: auto;
}

.users-table {
    width: 100%;
    border-collapse: collapse;
}

.users-table thead {
    background: var(--color-bg-elevated);
}

.users-table th {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-border);
}

.users-table td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.9375rem;
    color: var(--color-text-primary);
}

.users-table tr:hover {
    background: var(--color-bg-elevated);
}

.no-data {
    text-align: center;
    padding: var(--space-2xl) !important;
}

.no-data-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.no-data-icon {
    font-size: 3rem;
    opacity: 0.5;
}

.no-data-content p {
    color: var(--color-text-tertiary);
    font-size: 0.9375rem;
}

/* Status Badge */
.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 100px;
}

.status-badge.active {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #22c55e;
}

.status-badge.inactive {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.status-badge.expired {
    background: rgba(156, 163, 175, 0.1);
    border: 1px solid rgba(156, 163, 175, 0.3);
    color: #9ca3af;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-action {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-activate {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

.btn-activate:hover {
    background: rgba(34, 197, 94, 0.2);
}

.btn-deactivate {
    background: rgba(251, 191, 36, 0.1);
    color: #fbbf24;
}

.btn-deactivate:hover {
    background: rgba(251, 191, 36, 0.2);
}

.btn-delete {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.btn-delete:hover {
    background: rgba(239, 68, 68, 0.2);
}

/* === Responsive Design === */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .hero-visual {
        height: 400px;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .calculators-grid {
        grid-template-columns: 1fr;
    }
    
    .pro-features-main {
        grid-template-columns: 1fr;
    }
    
    .secondary-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: var(--space-xl) 0;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-visual {
        display: none;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .pro-title {
        font-size: 2rem;
    }
    
    .calculators-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .pro-features-main {
        grid-template-columns: 1fr;
    }
    
    .secondary-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-container {
        flex-direction: column;
        gap: var(--space-xs);
        text-align: center;
    }
    
    .input-row {
        grid-template-columns: 1fr;
    }
    
    .price-amount {
        font-size: 3.5rem;
    }
    
    /* Admin responsive */
    .admin-header-content {
        flex-direction: column;
        gap: var(--space-md);
        align-items: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .users-table {
        font-size: 0.8125rem;
    }
    
    .users-table th,
    .users-table td {
        padding: var(--space-xs) var(--space-sm);
    }
    
    .action-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    :root {
        --space-md: 0.875rem;
        --space-lg: 1.25rem;
        --space-xl: 2rem;
        --space-2xl: 2.5rem;
        --space-3xl: 3rem;
    }
    
    .hero-title {
        font-size: 1.875rem;
    }
    
    .btn-primary {
        width: 100%;
        justify-content: center;
    }
    
    .calculators-grid {
        grid-template-columns: 1fr;
    }
    
    .calculator-card {
        padding: var(--space-md);
    }
    
    .price-amount {
        font-size: 3rem;
    }
    
    .feature-title-main {
        font-size: 1.25rem;
    }
}
/* ========================================
   ESTILOS PARA SISTEMA DE USUARIOS
   Agregar al final del styles.css
   ======================================== */

/* === BOTONES DE NAVBAR === */
.btn-register {
    padding: 0.625rem 1.25rem;
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: 0.75rem;
}

.btn-register:hover {
    background: var(--color-primary);
    color: white;
}

.btn-login {
    margin-right: 0.75rem;
}

/* === USER MENU (cuando está logueado) === */
.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-name {
    font-weight: 600;
    color: var(--color-text-primary);
}

.user-plan-badge {
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-elevated);
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

.btn-logout {
    padding: 0.5rem 1rem;
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-logout:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* === MODALES BASE === */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    max-width: 480px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--color-bg-elevated);
    border-radius: 50%;
    font-size: 24px;
    line-height: 1;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    z-index: 1;
}

.modal-close:hover {
    background: var(--color-border);
    color: var(--color-text-primary);
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--color-text-primary);
    margin: 0 0 1.5rem 0;
    padding: 1.5rem 1.5rem 0;
}

.modal-body {
    padding: 0 1.5rem 1.5rem;
}

/* === FORMULARIOS === */
.form-group {
    margin-bottom: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-body);
    transition: all 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.btn-primary {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.2);
}

.btn-block {
    width: 100%;
}

.error-message {
    padding: 0.75rem 1rem;
    background: #fee;
    border: 1px solid #fcc;
    border-radius: 8px;
    color: #c33;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.modal-footer-text {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.modal-footer-text a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
}

.modal-footer-text a:hover {
    text-decoration: underline;
}

/* === MODAL DE UPGRADE PRO === */
.modal-upgrade {
    max-width: 600px;
}

.upgrade-header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    padding: 2rem 1.5rem;
    border-radius: 16px 16px 0 0;
    margin: 0;
}

.upgrade-header .modal-title {
    color: white;
    margin: 0;
    padding: 0;
}

.upgrade-price {
    font-size: 2rem;
    font-weight: 700;
    margin: 0.5rem 0 0 0;
}

.upgrade-benefits {
    margin-bottom: 2rem;
}

.upgrade-benefits h3,
.upgrade-instructions h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0 0 1rem 0;
}

.benefits-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.benefits-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.benefits-list li:last-child {
    border-bottom: none;
}

.instructions-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.instructions-list li {
    padding: 1.25rem;
    background: var(--color-bg-elevated);
    border-radius: 12px;
    margin-bottom: 1rem;
}

.instructions-list li strong {
    color: var(--color-primary);
}

.instructions-list li small {
    color: var(--color-text-tertiary);
    font-size: 0.8125rem;
}

.btn-payment {
    display: inline-block;
    margin-top: 0.75rem;
    padding: 0.75rem 1.5rem;
    background: var(--color-pro-accent);
    color: var(--color-pro-bg);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 700;
    transition: all 0.2s;
}

.btn-payment:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
}

/* === PLAN BADGES EN ADMIN === */
.plan-badge {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

.plan-badge.pro {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: var(--color-text-primary);
}

.plan-badge.free {
    background: var(--color-bg-elevated);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .user-menu {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .modal-content {
        width: 95%;
        max-height: 95vh;
    }
    
    .btn-register,
    .btn-login {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

/* ========================================
   PRO CALCULATORS - ACCESO DIRECTO
   ======================================== */

.pro-calculators-section {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
}

.pro-calc-section-title {
    font-family: var(--font-display);
    font-size: 2rem;
    color: white;
    text-align: center;
    margin-bottom: 2rem;
}

.pro-calculators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.pro-calc-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(251, 191, 36, 0.2);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.pro-calc-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-pro-accent);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.pro-calc-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.pro-calc-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: white;
    margin-bottom: 0.75rem;
}

.pro-calc-description {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9375rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.btn-pro-calc {
    padding: 1rem 2rem;
    background: var(--color-pro-accent);
    color: var(--color-pro-bg);
    border: none;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    font-size: 1rem;
}

.btn-pro-calc:hover:not(.disabled) {
    background: #fcd34d;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(251, 191, 36, 0.4);
}

.btn-pro-calc.disabled {
    background: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.5);
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 768px) {
    .pro-calculators-grid {
        grid-template-columns: 1fr;
    }

    .pro-calc-section-title {
        font-size: 1.5rem;
    }
}

/* ========================================
   MEJORAS PRO - BOTÓN FLOTANTE Y DROPDOWN
   ======================================== */

/* === BOTÓN FLOTANTE PRO === */
.floating-pro-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
    animation: floatIn 0.5s ease-out;
}

@keyframes floatIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.floating-pro-btn button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.75rem;
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #0f172a;
    border: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(251, 191, 36, 0.4);
    transition: all 0.3s ease;
}

.floating-pro-btn button:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(251, 191, 36, 0.6);
    background: linear-gradient(135deg, #fcd34d, #fbbf24);
}

.floating-icon {
    font-size: 1.25rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.floating-text {
    font-size: 0.9375rem;
}

/* === DROPDOWN MENÚ PRO === */
.nav-pro-menu {
    position: relative;
    display: inline-block;
}

/* Solo mostrar dropdown en hover si está habilitado (usuario PRO) */
.nav-pro-menu:hover .pro-dropdown.pro-dropdown-enabled {
    display: block !important;
}

.pro-dropdown {
    display: none; /* Oculto por defecto */
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 0.5rem 0;
    min-width: 220px;
    z-index: 1000;
    animation: dropdownSlide 0.3s ease-out;
}

@keyframes dropdownSlide {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.pro-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
}

.pro-dropdown-item:hover {
    background: linear-gradient(90deg, #eff6ff, #dbeafe);
    color: var(--color-primary);
}

.pro-dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: 0.5rem 0;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .floating-pro-btn {
        bottom: 20px;
        right: 20px;
    }
    
    .floating-pro-btn button {
        padding: 0.875rem 1.25rem;
        font-size: 0.875rem;
    }
    
    .floating-text {
        display: none;
    }
    
    .floating-icon {
        font-size: 1.5rem;
    }
    
    .pro-dropdown {
        right: auto;
        left: 50%;
        transform: translateX(-50%);
        min-width: 200px;
    }
}

@media (max-width: 480px) {
    .floating-pro-btn button {
        padding: 0.75rem 1rem;
    }
    
    .floating-icon {
        font-size: 1.25rem;
    }
}

/* === LINKS LEGALES EN FOOTER === */
.footer-legal-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin: 0.75rem 0;
}

.footer-legal-link {
    color: var(--color-text-tertiary);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: color 0.2s;
}

.footer-legal-link:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.footer-separator {
    color: var(--color-text-tertiary);
    font-size: 0.8125rem;
}

@media (max-width: 480px) {
    .footer-legal-links {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .footer-separator {
        display: none;
    }
}

/* === LOGO COMO LINK === */
.nav-brand {
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.2s;
}

.nav-brand:hover {
    opacity: 0.8;
}

/* === MENÚ MÓVIL MEJORADO === */
/* === FIX MENÚ MÓVIL - CONSOLIDADO Y FUNCIONAL === */
@media (max-width: 768px) {
    /* NAVBAR */
    .navbar {
        padding: 0.75rem 0;
    }
    
    .nav-container {
        height: 60px;
        padding: 0 0.75rem;
        gap: 0.5rem;
    }
    
    /* HAMBURGUESA - VISIBLE Y FUNCIONAL */
    .mobile-menu-toggle {
        display: flex !important;
        flex-direction: column;
        justify-content: space-around;
        width: 30px;
        height: 24px;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 0;
        z-index: 1001;
        order: -1;
        margin-right: 0.5rem;
    }
    
    .mobile-menu-toggle span {
        width: 100%;
        height: 3px;
        background: var(--color-text-primary);
        border-radius: 10px;
        transition: all 0.3s ease;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    /* MENÚ DESPLEGABLE - FUNCIONAL */
    .nav-menu {
        display: flex !important;
        position: fixed !important;
        top: 60px !important;
        left: -100% !important;
        width: 100% !important;
        height: calc(100vh - 60px) !important;
        background: white !important;
        flex-direction: column !important;
        padding: 2rem !important;
        gap: 1rem !important;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2) !important;
        transition: left 0.3s ease-in-out !important;
        z-index: 9999 !important;
        overflow-y: auto !important;
    }
    
    .nav-menu.active {
        left: 0 !important;
        display: flex !important;
    }
    
    /* LINKS DEL MENÚ */
    .nav-link {
        padding: 1rem 0.5rem;
        font-size: 1.125rem;
        border-bottom: 1px solid var(--color-border);
        width: 100%;
    }
    
    /* PRO MENU EN MÓVIL */
    .nav-pro-menu {
        width: 100%;
    }
    
    .pro-dropdown {
        position: static !important;
        display: none;
        box-shadow: none;
        padding: 0.5rem 0 0 1rem;
        margin-top: 0.5rem;
        background: #f8fafc;
        border-radius: 8px;
    }
    
    .nav-menu.active .pro-dropdown.pro-dropdown-enabled {
        display: block !important;
    }
    
    /* LOGO */
    .nav-brand {
        order: 0;
        margin: 0 auto;
        gap: 0.375rem;
    }
    
    .brand-logo {
        width: 35px;
        height: 35px;
    }
    
    .brand-name {
        font-size: 0.7rem;
        font-weight: 700;
    }
    
    .brand-country {
        font-size: 0.6rem;
    }
    
    /* BOTONES LOGIN */
    .login-container {
        order: 1;
        gap: 0.25rem;
        flex-shrink: 0;
    }
    
    .btn-register,
    .btn-login {
        padding: 0.4rem 0.6rem;
        font-size: 0.7rem;
        border-radius: 6px;
    }
    
    .btn-admin-secret {
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }
    
    /* USER MENU */
    .user-menu {
        gap: 0.25rem;
        font-size: 0.7rem;
    }
    
    .user-name {
        max-width: 60px;
        font-size: 0.7rem;
    }
    
    .user-plan-badge {
        font-size: 0.6rem;
        padding: 0.125rem 0.3rem;
    }
    
    .btn-logout {
        padding: 0.35rem 0.55rem;
        font-size: 0.65rem;
    }
}

/* PANTALLAS PEQUEÑAS */
@media (max-width: 400px) {
    .brand-text {
        display: none;
    }
    
    .brand-logo {
        width: 38px;
        height: 38px;
    }
}

/* PANTALLAS ULTRA PEQUEÑAS */
@media (max-width: 360px) {
    .btn-register {
        display: none;
    }
}

/* === MENÚ MÓVIL - USER LOGUEADO === */
@media (max-width: 768px) {
    /* Header del usuario dentro del menú */
    .nav-menu .user-info-header {
        background: linear-gradient(135deg, #2563eb, #0ea5e9);
        padding: 1.5rem;
        border-radius: 12px;
        margin-bottom: 1rem;
        color: white;
    }
    
    .nav-menu .user-greeting {
        font-size: 0.875rem;
        opacity: 0.9;
        margin-bottom: 0.25rem;
    }
    
    .nav-menu .user-name-display {
        font-size: 1.25rem;
        font-weight: 700;
        margin-bottom: 0.5rem;
        word-wrap: break-word;
    }
    
    .nav-menu .user-plan-badge-mobile {
        display: inline-flex;
        align-items: center;
        gap: 0.25rem;
        background: rgba(255, 255, 255, 0.2);
        padding: 0.25rem 0.75rem;
        border-radius: 20px;
        font-size: 0.75rem;
        font-weight: 600;
    }
    
    /* Botón de logout en el menú */
    .nav-menu .logout-button-mobile {
        background: rgba(239, 68, 68, 0.1);
        color: #dc2626;
        padding: 0.875rem;
        border-radius: 8px;
        border: 1px solid rgba(239, 68, 68, 0.2);
        font-size: 0.9375rem;
        font-weight: 600;
        text-align: center;
        cursor: pointer;
        margin-top: 1rem;
    }
    
    .nav-menu .logout-button-mobile:active {
        background: rgba(239, 68, 68, 0.2);
    }
}

/* === DROPDOWN PRO DESHABILITADO === */
/* El dropdown fue eliminado. Ahora Pro es un link directo a las calculadoras */
.nav-pro-menu:hover .pro-dropdown,
.pro-dropdown.pro-dropdown-enabled,
.nav-menu.active .pro-dropdown.pro-dropdown-enabled {
    display: none !important;
}