/* ==========================================================================
   AI Content Gallery - Stylesheet
   Modern, minimal design with dark theme and tech/AI aesthetic
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Color Palette */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a25;
    --color-bg-card: #16161f;
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0b0;
    --color-text-muted: #6b6b7a;
    
    --color-accent-primary: #6366f1;
    --color-accent-secondary: #8b5cf6;
    --color-accent-glow: rgba(99, 102, 241, 0.4);
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #12121a 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0) 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--color-accent-glow);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* --------------------------------------------------------------------------
   Layout Utilities
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* --------------------------------------------------------------------------
   Section Common Styles
   -------------------------------------------------------------------------- */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent-primary);
    background: rgba(99, 102, 241, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: 1rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    overflow: hidden;
}

/* Animated background effect */
.hero__bg-animation {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.1), transparent),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(168, 85, 247, 0.08), transparent);
    animation: heroGlow 8s ease-in-out infinite alternate;
}

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

/* Grid pattern overlay */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-accent-primary);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease forwards;
}

.hero__badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-accent-primary);
    border-radius: 50%;
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero__title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #ffffff 0%, #a0a0b0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease 0.1s forwards;
    opacity: 0;
}

.hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text-primary);
    background: var(--gradient-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-glow);
    transition: var(--transition-base);
    animation: fadeInUp 0.8s ease 0.3s forwards;
    opacity: 0;
}

.hero__cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px var(--color-accent-glow);
}

.hero__cta svg {
    transition: transform var(--transition-fast);
}

.hero__cta:hover svg {
    transform: translate(3px, -3px);
}

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

/* Scroll indicator */
.hero__scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: fadeIn 1s ease 0.8s forwards;
    opacity: 0;
}

.hero__scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--color-text-muted) 0%, transparent 100%);
    animation: scrollLine 2s ease infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* --------------------------------------------------------------------------
   Gallery Section
   -------------------------------------------------------------------------- */
.gallery {
    padding: var(--spacing-2xl) 0;
    background: var(--gradient-dark);
}

.gallery__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .gallery__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .gallery__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Gallery Card */
.gallery__card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition-base);
}

.gallery__card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-card);
    pointer-events: none;
    z-index: 1;
}

.gallery__card:hover {
    transform: translateY(-8px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-lg);
}

.gallery__card:hover .gallery__card-image {
    transform: scale(1.05);
}

.gallery__card:hover .gallery__card-overlay {
    opacity: 1;
}

.gallery__card-image-wrapper {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
}

.gallery__card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery__card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.8) 100%);
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-md);
    opacity: 0;
    transition: var(--transition-base);
    z-index: 2;
}

.gallery__card-view {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.gallery__card-content {
    padding: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.gallery__card-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.gallery__card-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-secondary);
}

.about__wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

@media (min-width: 1024px) {
    .about__wrapper {
        grid-template-columns: 1.2fr 1fr;
        gap: var(--spacing-2xl);
    }
}

.about__content .section-tag,
.about__content .section-title {
    text-align: left;
}

.about__text {
    margin-bottom: var(--spacing-lg);
}

.about__text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.about__text p:last-child {
    margin-bottom: 0;
}

.about__features {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 640px) {
    .about__features {
        grid-template-columns: repeat(3, 1fr);
    }
}

.about__feature {
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.about__feature:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
}

.about__feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent-primary);
}

.about__feature h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.about__feature p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* About Visual Card */
.about__visual {
    display: flex;
    justify-content: center;
}

.about__visual-card {
    position: relative;
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-xl);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.about__visual-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, var(--color-accent-glow) 0%, transparent 50%);
    opacity: 0.3;
    animation: rotateGlow 10s linear infinite;
}

@keyframes rotateGlow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.about__visual-content {
    position: relative;
    z-index: 1;
}

.about__stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.about__stat {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
}

.about__stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

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

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
}

.footer__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
    .footer__content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.footer__logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer__tagline {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer__links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer__links a {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.footer__links a:hover {
    color: var(--color-text-primary);
}

.footer__bottom {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    text-align: center;
}

@media (min-width: 768px) {
    .footer__bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer__copyright,
.footer__note {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Modal
   -------------------------------------------------------------------------- */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    visibility: hidden;
    opacity: 0;
    transition: var(--transition-base);
}

.modal.active {
    visibility: visible;
    opacity: 1;
}

.modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal__container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-base);
}

.modal.active .modal__container {
    transform: scale(1) translateY(0);
}

.modal__close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    color: var(--color-text-primary);
    transition: var(--transition-fast);
}

.modal__close:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: rotate(90deg);
}

.modal__content {
    display: flex;
    flex-direction: column;
    max-height: 90vh;
    overflow-y: auto;
}

@media (min-width: 768px) {
    .modal__content {
        flex-direction: row;
    }
}

.modal__image-wrapper {
    flex: 1.2;
    background: var(--color-bg-primary);
}

.modal__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 250px;
}

@media (min-width: 768px) {
    .modal__image {
        min-height: 400px;
    }
}

.modal__info {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.modal__title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.modal__description {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.modal__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.modal__tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent-primary);
    background: rgba(99, 102, 241, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

/* Body scroll lock when modal is open */
body.modal-open {
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   Scrollbar Styling
   -------------------------------------------------------------------------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Selection Styling
   -------------------------------------------------------------------------- */
::selection {
    background: var(--color-accent-primary);
    color: var(--color-text-primary);
}