/*
 * Landing Page Engine - Main Styles
 * Uses CSS Variables for theming - no hardcoded colors
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Loading State */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 3px solid var(--surface-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ============================================
   HERO SECTION
   ============================================ */
.section-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding: var(--spacing-3xl) 0;
}

.section-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at top, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

/* Hero Layout Variations */

.hero-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
    width: 100%;
}

/* Centered Layout */
.hero-centered {
    text-align: center;
}

.hero-centered .hero-container {
    flex-direction: column;
    justify-content: center;
}

.hero-centered .hero-content {
    margin: 0 auto;
}

/* Split Layouts */
.hero-split-left .hero-container,
.hero-split-right .hero-container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
}

.hero-split-left .hero-container {
    flex-direction: row-reverse;
}

.hero-split-left .hero-content,
.hero-split-right .hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-split-left .hero-image-container,
.hero-split-right .hero-image-container {
    flex: 1;
    display: flex;
    justify-content: center;
    animation: fadeIn var(--transition-slow) ease-out;
}

/* Backward compatibility for hero-split */
.hero-split {
    text-align: left;
}

.hero-split .hero-container {
    flex-direction: row;
    justify-content: space-between;
}

.hero-split .hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-split .hero-image-container {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Full Width / Background Image Layout */
.hero-full {
    text-align: center;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-full .hero-container {
    flex-direction: column;
    justify-content: center;
    min-height: 80vh;
    background: rgba(0, 0, 0, 0.4);
    border-radius: var(--border-radius-2xl);
    padding: var(--spacing-3xl);
    backdrop-filter: blur(4px);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px -10px var(--primary-color);
}

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.section-about {
    padding: var(--spacing-3xl) 0;
    background: var(--surface-color);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.section-features {
    padding: var(--spacing-3xl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.feature-card {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 24px;
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.section-contact {
    padding: var(--spacing-3xl) 0;
    background: var(--surface-color);
}

.contact-content {
    text-align: center;
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--background-color);
    border-radius: var(--border-radius);
    color: var(--accent-color);
    font-size: var(--font-size-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
}

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

/* ============================================
   FOOTER
   ============================================ */
.section-footer {
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ============================================
   UTILITIES
   ============================================ */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn var(--transition-slow) ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --container-padding: var(--spacing-md);
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Error State */
.error-message {
    background: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.3);
    color: #fca5a5;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
}