/* ============================================
   Photography Portfolio - Design System
   ============================================ */

/* CSS Custom Properties */
:root {
    --color-bg: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-accent: #3b82f6;
    --color-accent-hover: #60a5fa;
    --color-border: #222222;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;

    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
}

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

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

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

a {
    color: inherit;
    text-decoration: none;
}

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

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

/* ============================================
   Header & Navigation
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md);
}

.header__inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.logo span {
    color: var(--color-accent);
}

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

.nav__link {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-accent);
    background: rgba(59, 130, 246, 0.1);
}

.nav__link--active {
    color: var(--color-accent);
}

/* Mobile nav toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-xs);
}

.nav__toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.hero__bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 40%, rgba(59, 130, 246, 0.2) 0%, transparent 50%);
}

.hero__content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    padding: var(--space-md);
}

.hero__title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto var(--space-lg);
}

.hero__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-accent);
    color: var(--color-text);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-glow);
}

.hero__cta:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(59, 130, 246, 0.25);
}

/* ============================================
   Section Base
   ============================================ */

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

.section__header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.section__title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--space-sm);
}

.section__subtitle {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

/* ============================================
   Gallery Grid - Base
   ============================================ */

.gallery {
    max-width: 1400px;
    margin: 0 auto;
}

.gallery__grid {
    display: grid;
    gap: var(--space-md);
}

/* ============================================
   Image Card
   ============================================ */

.image-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-secondary);
    transition: all var(--transition-normal);
}

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

.image-card__link {
    display: block;
}

.image-card__img-wrapper {
    position: relative;
    overflow: hidden;
}

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

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

.image-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.image-card:hover .image-card__overlay {
    opacity: 1;
}

.image-card__content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-md);
    transform: translateY(10px);
    opacity: 0;
    transition: all var(--transition-normal);
}

.image-card:hover .image-card__content {
    transform: translateY(0);
    opacity: 1;
}

.image-card__title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

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

/* ============================================
   About Section
   ============================================ */

.about {
    background: var(--color-bg-secondary);
}

.about__content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about__text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.about__btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.about__btn:hover {
    background: var(--color-accent);
    color: var(--color-text);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-lg) var(--space-md);
}

.footer__content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

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

.footer__social {
    display: flex;
    gap: var(--space-sm);
}

.social__link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-bg);
    transition: all var(--transition-fast);
}

.social__link:hover {
    background: var(--color-accent);
    transform: translateY(-2px);
}

/* ============================================
   Utility Classes
   ============================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    :root {
        --space-lg: 3rem;
        --space-xl: 5rem;
    }

    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-md);
    }

    .nav--open {
        display: flex;
    }

    .nav__toggle {
        display: flex;
    }

    .hero__cta {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --space-md: 1.5rem;
    }
}