/* ============================================
   CHOWDHURY PHOTOGRAPHY - APPLE-INSPIRED DESIGN
   Premium Dark Theme | Inter Font | Minimal
   ============================================ */

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Colors */
    --color-black: #000000;
    --color-dark: #0d0d0d;
    --color-dark-gray: #1c1c1c;
    --color-gray: #2d2d2d;
    --color-mid-gray: #6e6e73;
    --color-light-gray: #86868b;
    --color-white: #f5f5f7;
    --color-pure-white: #ffffff;
    --color-accent: #1d4d3c;
    --color-accent-light: #2a6b52;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-medium: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-slow: 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
    
    /* Layout */
    --max-width: 1200px;
    --nav-height: 48px;
}

/* ============================================
   RESET & BASE
   ============================================ */
*,
*::before,
*::after {
    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-family);
    font-weight: var(--font-weight-regular);
    background-color: var(--color-black);
    color: var(--color-white);
    line-height: 1.5;
    overflow-x: hidden;
}

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

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

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--space-lg);
    height: var(--nav-height);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
}

.nav--solid {
    background: var(--color-black);
}

.nav__logo {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.02em;
    color: var(--color-white);
    transition: opacity var(--transition-fast);
}

.nav__logo:hover {
    opacity: 0.8;
}

.nav__menu {
    display: flex;
    gap: var(--space-lg);
}

.nav__link {
    font-size: 0.875rem;
    font-weight: var(--font-weight-regular);
    color: var(--color-light-gray);
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-white);
}

.nav__link--active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--color-white);
}

/* ============================================
   HERO SECTION (VIDEO)
   ============================================ */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    overflow: hidden;
}

.hero__video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.8) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        rgba(0, 0, 0, 0.1) 100%
    );
}

.hero__content {
    position: relative;
    z-index: 2;
    padding: var(--space-3xl) var(--space-xl);
    max-width: 600px;
}

.hero__tagline {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: var(--font-weight-light);
    color: var(--color-white);
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
}

.hero__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-light);
    transition: all var(--transition-fast);
}

.hero__cta:hover {
    color: var(--color-white);
}

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

.hero__cta:hover .hero__cta-icon {
    transform: translateX(4px);
}

/* ============================================
   MAIN CONTAINER
   ============================================ */
.main {
    background: var(--color-dark);
}

/* ============================================
   FEATURED SECTION
   ============================================ */
.featured {
    padding: var(--space-lg);
    background: var(--color-dark);
}

.featured__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    max-width: var(--max-width);
    margin: 0 auto;
}

.featured__card {
    position: relative;
    aspect-ratio: 16 / 10;
    border-radius: 12px;
    overflow: hidden;
    background: var(--color-gray);
}

.featured__image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.featured__card:hover .featured__image {
    transform: scale(1.05);
}

.featured__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.8) 0%,
        rgba(0, 0, 0, 0.2) 50%,
        rgba(0, 0, 0, 0) 100%
    );
    transition: background var(--transition-medium);
}

.featured__card:hover .featured__overlay {
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.9) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        rgba(0, 0, 0, 0.1) 100%
    );
}

.featured__content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-lg);
    z-index: 2;
}

.featured__title {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xs);
    color: var(--color-pure-white);
}

.featured__link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8125rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-light);
    transition: color var(--transition-fast);
}

.featured__card:hover .featured__link {
    color: var(--color-white);
}

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

.featured__card:hover .featured__link svg {
    transform: translateX(3px);
}

/* ============================================
   QUOTE SECTION
   ============================================ */
.quote-section {
    padding: var(--space-4xl) var(--space-lg);
    text-align: center;
    background: var(--color-black);
}

.quote-section__text {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    font-weight: var(--font-weight-light);
    letter-spacing: -0.02em;
    color: var(--color-white);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   SHOWCASE SECTIONS
   ============================================ */
.showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 80vh;
    background: var(--color-black);
}

.showcase--reverse {
    direction: rtl;
}

.showcase--reverse > * {
    direction: ltr;
}

.showcase__image-container {
    position: relative;
    overflow: hidden;
}

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

.showcase:hover .showcase__image {
    transform: scale(1.02);
}

.showcase__content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-3xl);
    background: var(--color-dark);
}

.showcase__title {
    font-size: clamp(0.75rem, 1.5vw, 0.875rem);
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.showcase__heading {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.02em;
    color: var(--color-pure-white);
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.showcase__text {
    font-size: 1rem;
    font-weight: var(--font-weight-light);
    color: var(--color-light-gray);
    line-height: 1.7;
    max-width: 480px;
}

/* ============================================
   CTA MINIMAL
   ============================================ */
.cta-minimal {
    padding: var(--space-3xl) var(--space-lg);
    text-align: center;
    background: var(--color-dark);
}

.cta-minimal__button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-pure-white);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    transition: all var(--transition-medium);
}

.cta-minimal__button:hover {
    background: var(--color-pure-white);
    color: var(--color-black);
    border-color: var(--color-pure-white);
}

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

.cta-minimal__button:hover svg {
    transform: translateX(4px);
}

/* ============================================
   GALLERY PAGE
   ============================================ */
.gallery-hero {
    padding: calc(var(--nav-height) + var(--space-4xl)) var(--space-lg) var(--space-3xl);
    text-align: center;
    background: var(--color-black);
}

.gallery-hero__title {
    font-size: clamp(3rem, 10vw, 5rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.04em;
    margin-bottom: var(--space-sm);
}

.gallery-hero__subtitle {
    font-size: 1.25rem;
    font-weight: var(--font-weight-light);
    color: var(--color-light-gray);
}

.gallery-main {
    background: var(--color-dark);
    padding: var(--space-2xl) var(--space-lg) var(--space-4xl);
}

/* ============================================
   CATEGORY GRID
   ============================================ */
.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    max-width: var(--max-width);
    margin: 0 auto;
}

.category-card {
    position: relative;
    display: block;
    aspect-ratio: 16 / 10;
    border-radius: 16px;
    overflow: hidden;
    background: var(--color-gray);
}

.category-card__image-wrapper {
    position: absolute;
    inset: 0;
}

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

.category-card:hover .category-card__image {
    transform: scale(1.05);
}

.category-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.9) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        rgba(0, 0, 0, 0.1) 100%
    );
    transition: background var(--transition-medium);
}

.category-card:hover .category-card__overlay {
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.95) 0%,
        rgba(0, 0, 0, 0.4) 50%,
        rgba(0, 0, 0, 0.2) 100%
    );
}

.category-card__content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-lg);
    z-index: 2;
}

.category-card__title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xs);
    color: var(--color-pure-white);
}

.category-card__description {
    font-size: 0.9375rem;
    font-weight: var(--font-weight-light);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-md);
}

.category-card__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-light);
    transition: all var(--transition-fast);
}

.category-card:hover .category-card__link {
    color: var(--color-white);
}

.category-card__icon {
    transition: transform var(--transition-fast);
}

.category-card:hover .category-card__icon {
    transform: translateX(4px);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-black);
    padding: var(--space-xl) var(--space-lg);
    border-top: 1px solid var(--color-gray);
}

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

.footer__copyright {
    font-size: 0.875rem;
    font-weight: var(--font-weight-light);
    color: var(--color-mid-gray);
}

.footer__nav {
    display: flex;
    gap: var(--space-lg);
}

.footer__link {
    font-size: 0.875rem;
    color: var(--color-light-gray);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-white);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 992px) {
    .category-grid {
        gap: var(--space-xs);
    }
    
    .category-card__content {
        padding: var(--space-md);
    }
    
    .featured__grid {
        gap: var(--space-xs);
    }
    
    .featured__content {
        padding: var(--space-md);
    }
    
    .showcase {
        grid-template-columns: 1fr;
        min-height: auto;
    }
    
    .showcase--reverse {
        direction: ltr;
    }
    
    .showcase__image-container {
        aspect-ratio: 16 / 10;
    }
    
    .showcase__content {
        padding: var(--space-2xl) var(--space-lg);
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav {
        padding: 0 var(--space-md);
    }
    
    .nav__menu {
        gap: var(--space-md);
    }
    
    .nav__link {
        font-size: 0.8125rem;
    }
    
    .hero__content {
        padding: var(--space-2xl) var(--space-md);
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .category-card {
        aspect-ratio: 16 / 12;
    }
    
    .featured {
        padding: var(--space-md);
    }
    
    .featured__grid {
        grid-template-columns: 1fr;
        gap: var(--space-xs);
    }
    
    .featured__card {
        aspect-ratio: 16 / 10;
    }
    
    .featured__content {
        padding: var(--space-md);
    }
    
    .quote-section {
        padding: var(--space-3xl) var(--space-md);
    }
    
    .cta-minimal {
        padding: var(--space-2xl) var(--space-md);
    }
    
    .showcase__content {
        padding: var(--space-xl) var(--space-md);
    }
    
    .showcase__image-container {
        aspect-ratio: 4 / 3;
    }
    
    .footer__content {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .hero__tagline {
        font-size: 1.125rem;
    }
    
    .gallery-hero__title {
        font-size: 2.5rem;
    }
    
    .category-card__title {
        font-size: 1.5rem;
    }
    
    .featured__title {
        font-size: 1.125rem;
    }
    
    .quote-section__text {
        font-size: 1.25rem;
    }
}

/* ============================================
   CATEGORY PAGE STYLES
   ============================================ */
.category-header {
    padding: calc(var(--nav-height) + var(--space-3xl)) var(--space-lg) var(--space-2xl);
    text-align: center;
    background: var(--color-black);
}

.category-header__back {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-light);
    margin-bottom: var(--space-lg);
    transition: color var(--transition-fast);
}

.category-header__back:hover {
    color: var(--color-white);
}

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

.category-header__back:hover svg {
    transform: translateX(-4px);
}

.category-header__title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.03em;
    margin-bottom: var(--space-xs);
}

.category-header__subtitle {
    font-size: 1.125rem;
    font-weight: var(--font-weight-light);
    color: var(--color-light-gray);
}

/* ============================================
   IMAGE GALLERY GRID
   ============================================ */
.image-gallery {
    background: var(--color-dark);
    padding: var(--space-xl) var(--space-lg) var(--space-4xl);
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xs);
    max-width: var(--max-width);
    margin: 0 auto;
}

.image-grid__item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    background: var(--color-gray);
}

.image-grid__image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    transition: transform var(--transition-slow), opacity var(--transition-medium);
}

.image-grid__item:hover .image-grid__image {
    transform: scale(1.03);
    opacity: 0.9;
}

/* Responsive Image Grid */
@media (max-width: 992px) {
    .image-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .image-grid {
        grid-template-columns: 1fr;
    }
    
    .image-grid__image {
        aspect-ratio: 4 / 3;
    }
}