/* 
 * KOBIA LANDING PAGE - STYLES
 * Version: 1.0
 * Philosophy: Apple Minimalism + Notion Modularity
 */

:root {
    /* Product Colors */
    --color-blue-primary: #185FA5;    /* Kobia Catálogos */
    --color-blue-light: #378ADD;      /* Kobia Estructurador */
    --color-earth-brown: #8B6F47;     /* KobiaGeotecnia */
    --color-blue-dark: #0C447C;       /* KobiaLicitaciones */

    /* Neutrals */
    --color-white: #FFFFFF;
    --color-gray-verylight: #F8F7F5;
    --color-gray-light: #E8E5E0;
    --color-gray-medium: #666666;
    --color-black: #000000;

    /* Semantic */
    --color-success: #27A745;
    --color-warning: #EF9F27;
    --color-error: #E24B4A;
    --color-info: #378ADD;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    
    /* Font Sizes */
    --text-xs: 11px;
    --text-sm: 12px;
    --text-base: 14px;
    --text-lg: 16px;
    --text-xl: 18px;
    --text-2xl: 22px;
    --text-3xl: 28px;
    --text-4xl: 36px;
    --text-5xl: 48px;
    --text-6xl: 56px;

    /* Font Weights */
    --weight-normal: 400;
    --weight-medium: 500;

    /* Spacing (4px system) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 24px;
    --space-2xl: 32px;
    --space-3xl: 48px;
    --space-4xl: 64px;
    --space-5xl: 80px;
    --space-6xl: 100px;

    /* Borders & Radius */
    --border-width: 0.5px;
    --border-color: var(--color-gray-light);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Base Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    color: var(--color-black);
    line-height: 1.6;
    background-color: var(--color-white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    transition: var(--transition-fast);
}

/* Layout Components */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.section-padding {
    padding: var(--space-6xl) 0;
}

/* Typography Utilities */
h1, h2, h3, h4 {
    font-weight: var(--weight-medium);
    line-height: 1.2;
}

.text-center { text-align: center; }
.text-gray { color: var(--color-gray-medium); }
.text-white { color: var(--color-white); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: var(--text-base);
    font-weight: var(--weight-medium);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: #144e8a;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-blue-primary);
    border: var(--border-width) solid var(--color-gray-light);
}

.btn-secondary:hover {
    background-color: var(--color-gray-verylight);
}

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

.btn-white:hover {
    background-color: var(--color-gray-verylight);
}

.btn-outline-white {
    background-color: transparent;
    color: var(--color-white);
    border: 1px solid var(--color-white);
}

.btn-outline-white:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: var(--border-width) solid var(--color-gray-light);
    padding: var(--space-lg) 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-2xl);
    font-weight: var(--weight-medium);
    color: var(--color-blue-primary);
}

.logo-k {
    width: 32px;
    height: 32px;
    background: var(--color-blue-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    font-size: var(--text-base);
    color: var(--color-gray-medium);
    font-weight: var(--weight-normal);
}

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

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(to bottom, var(--color-gray-verylight), var(--color-white));
}

.hero .container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-4xl);
    align-items: center;
}

.hero-content .eyebrow {
    font-size: var(--text-sm);
    color: var(--color-gray-medium);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-content h1 {
    font-size: var(--text-6xl);
    margin-bottom: var(--space-xl);
}

.hero-content .subhead {
    font-size: var(--text-xl);
    color: var(--color-gray-medium);
    margin-bottom: var(--space-3xl);
    max-width: 500px;
}

.hero-ctas {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
    margin-bottom: var(--space-sm);
}

.hero-micro {
    font-size: var(--text-xs);
    color: var(--color-gray-medium);
}

.hero-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

/* Problem Section */
.problems {
    background: var(--color-gray-verylight);
    border-top: var(--border-width) solid var(--color-gray-light);
    border-bottom: var(--border-width) solid var(--color-gray-light);
}

.section-intro {
    margin-bottom: var(--space-4xl);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.problem-card {
    background: var(--color-white);
    padding: var(--space-3xl) var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: var(--border-width) solid var(--color-gray-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-blue-primary);
}

.problem-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-blue-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.problem-card:hover::before {
    opacity: 1;
}

.problem-number {
    font-size: 64px;
    font-weight: 500;
    color: var(--color-blue-primary);
    line-height: 1;
    margin-bottom: var(--space-md);
    display: block;
}

.problem-text {
    font-size: var(--text-lg);
    color: var(--color-gray-medium);
    font-weight: 400;
    line-height: 1.4;
}

/* Products Section */
.products {
    background: var(--color-gray-verylight);
}

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

.product-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: var(--border-width) solid var(--color-gray-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.product-header {
    padding: var(--space-lg) var(--space-xl);
    color: var(--color-white);
    min-height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

.product-header.catalogos { background: linear-gradient(135deg, #185FA5 0%, #0C447C 100%); }
.product-header.estructurador { background: linear-gradient(135deg, #378ADD 0%, #185FA5 100%); }
.product-header.geotecnia { background: linear-gradient(135deg, #8B6F47 0%, #6B5437 100%); }
.product-header.licitaciones { background: linear-gradient(135deg, #0C447C 0%, #042C53 100%); }

.product-header-content {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.product-icon {
    width: 48px;
    height: 48px;
}

.product-header-text h3 {
    font-size: var(--text-2xl);
    margin-bottom: 2px;
}

.product-header-text p {
    font-size: var(--text-sm);
    opacity: 0.85;
}

.video-btn-header {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-xl);
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    display: flex;
    align-items: center;
    gap: 6px;
    backdrop-filter: blur(5px);
}

.product-image-wrapper {
    width: 100%;
    height: 240px;
    overflow: hidden;
    background: var(--color-gray-verylight);
}

.product-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image-wrapper img {
    transform: scale(1.05);
}

.product-body {
    padding: var(--space-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-description {
    font-size: var(--text-base);
    color: var(--color-gray-medium);
    margin-bottom: var(--space-lg);
}

.product-benefits {
    margin-bottom: var(--space-xl);
    flex: 1;
}

.product-benefits li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    font-size: var(--text-base);
}

.benefit-icon {
    color: var(--color-success);
    flex-shrink: 0;
    margin-top: 4px;
}

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

/* How it Works */
.how-it-works {
    background: var(--color-gray-verylight);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3xl);
    position: relative;
}

.step-card {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid var(--color-blue-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    font-weight: var(--weight-medium);
    margin: 0 auto var(--space-xl);
    background: var(--color-white);
}

.step-card h4 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-sm);
}

.step-card p {
    font-size: var(--text-sm);
    color: var(--color-gray-medium);
}

/* Metrics Section */
.metrics {
    background: var(--color-white);
    border-top: var(--border-width) solid var(--color-gray-light);
    border-bottom: var(--border-width) solid var(--color-gray-light);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
}

.metric-item {
    text-align: center;
    padding: var(--space-4xl) 0;
    border-right: var(--border-width) solid var(--color-gray-light);
}

.metric-item:last-child {
    border-right: none;
}

.metric-value {
    font-size: 72px;
    font-weight: var(--weight-medium);
    color: var(--color-blue-primary);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.metric-label {
    font-size: var(--text-sm);
    color: var(--color-gray-medium);
}

/* Audience Section */
.audience .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.audience-list li {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    font-size: var(--text-lg);
}

.check-icon {
    width: 24px;
    height: 24px;
    background: var(--color-success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.audience-image img {
    border-radius: var(--radius-lg);
    filter: saturate(0.9);
}

/* CTA Section */
.cta-final {
    background: linear-gradient(135deg, #185FA5 0%, #0C447C 100%);
    color: var(--color-white);
    text-align: center;
}

.cta-final h2 {
    font-size: var(--text-5xl);
    margin-bottom: var(--space-lg);
}

.cta-final p {
    font-size: var(--text-xl);
    opacity: 0.9;
    margin-bottom: var(--space-3xl);
}

.cta-ctas {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.cta-micro {
    font-size: var(--text-sm);
    opacity: 0.7;
}

/* Footer */
.footer {
    background: var(--color-black);
    color: rgba(255, 255, 255, 0.6);
    padding: var(--space-6xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-4xl);
    margin-bottom: var(--space-4xl);
}

.footer-col h5 {
    color: var(--color-white);
    margin-bottom: var(--space-xl);
    font-size: var(--text-base);
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-sm);
}

/* Video Modal */
.video-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.video-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    cursor: pointer;
}

.video-modal-content {
    position: relative;
    width: 90%;
    max-width: 1200px;
    z-index: 10000;
}

.video-modal-close {
    position: absolute;
    top: -50px;
    right: 0;
    color: white;
    font-size: 32px;
    opacity: 0.8;
}

.video-modal-close:hover { opacity: 1; }

.video-modal-wrapper {
    width: 100%;
    padding-bottom: 56.25%;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #000;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5);
}

.video-modal-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-content h1 { font-size: var(--text-5xl); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hero .container,
    .problems-grid,
    .products-grid,
    .steps-grid,
    .metrics-grid,
    .audience .container,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero-content h1 { font-size: var(--text-4xl); }
    .hero { padding-top: 100px; }
    
    .nav-links { display: none; }
    
    .metric-item {
        border-right: none;
        border-bottom: var(--border-width) solid var(--color-gray-light);
    }
    
    .cta-ctas { flex-direction: column; }
    
    .header .btn { display: none; }
}

/* Scroll Reveal Animations */
.reveal-hidden {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-active {
    opacity: 1;
    transform: translateY(0);
}