/* ==========================================================================
   Low Dynamic Range - Stylesheet
   Minimalist black & white analog photography portfolio
   Typography: Space Grotesk + Space Mono
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    --color-bg: #1a1a1a;
    --color-fg: #e8e8e8;
    --color-border: #333;
    --color-muted: #888;

    --font-display: 'Space Grotesk', sans-serif;
    --font-mono: 'Space Mono', monospace;

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

    --max-width: 1400px;
    --header-height: 4rem;

    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-fg);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

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

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.1;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
}

.header__logo a {
    display: block;
}

.header__title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    line-height: 1.2;
}

.header__subtitle {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-top: 0.15rem;
}

.header__nav {
    display: none;
}

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

.nav__link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--space-xs) 0;
    position: relative;
    transition: opacity var(--transition-fast);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--color-fg);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-normal);
}

.nav__link:hover::after,
.nav__link--active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav__link--active {
    opacity: 1;
}

/* Mobile menu toggle */
.header__menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 24px;
    height: 24px;
    padding: 0;
}

.menu-toggle__bar {
    display: block;
    width: 100%;
    height: 1px;
    background-color: var(--color-fg);
    transition: transform var(--transition-fast);
}

.header__menu-toggle[aria-expanded="true"] .menu-toggle__bar:first-child {
    transform: translateY(3.5px) rotate(45deg);
}

.header__menu-toggle[aria-expanded="true"] .menu-toggle__bar:last-child {
    transform: translateY(-3.5px) rotate(-45deg);
}

/* Desktop navigation */
@media (min-width: 768px) {
    .header__nav {
        display: block;
    }

    .header__menu-toggle {
        display: none;
    }
}

/* Mobile navigation open state */
.header__nav--open {
    display: block;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
}

.header__nav--open .nav__list {
    flex-direction: column;
    gap: var(--space-sm);
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.main {
    flex: 1;
    margin-top: var(--header-height);
    padding: var(--space-md);
}

.main--about {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

/* --------------------------------------------------------------------------
   Gallery
   -------------------------------------------------------------------------- */
.gallery {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
}

/* Gallery header */
.gallery__header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    min-height: 2rem;
}

.gallery__back {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    transition: color var(--transition-fast);
}

.gallery__back:hover {
    color: var(--color-fg);
}

.gallery__title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Category tiles grid */
.gallery__grid--categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-sm);
    column-count: unset;
}

@media (min-width: 768px) {
    .gallery__grid--categories {
        grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    }
}

/* Category tile */
.category-tile {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    cursor: pointer;
    background-color: var(--color-border);
}

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

.category-tile:hover .category-tile__image,
.category-tile:focus-within .category-tile__image {
    transform: scale(1.05);
}

.category-tile__overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    transition: background var(--transition-normal);
}

.category-tile:hover .category-tile__overlay,
.category-tile:focus-within .category-tile__overlay {
    background: rgba(0, 0, 0, 0.7);
}

.category-tile__title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-align: center;
}

.category-tile__count {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-muted);
    margin-top: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* True masonry layout using CSS columns */
.gallery__grid {
    column-count: 1;
    column-gap: var(--space-sm);
}

@media (min-width: 500px) {
    .gallery__grid {
        column-count: 2;
    }
}

@media (min-width: 900px) {
    .gallery__grid {
        column-count: 3;
    }
}

@media (min-width: 1200px) {
    .gallery__grid {
        column-count: 4;
    }
}

.gallery__item {
    break-inside: avoid;
    cursor: pointer;
    overflow: hidden;
    position: relative;
    background-color: var(--color-border);
    margin-bottom: var(--space-sm);
    display: inline-block;
    width: 100%;
}

.gallery__item::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: var(--color-bg);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 1;
    pointer-events: none;
}

.gallery__item:hover::before,
.gallery__item:focus-within::before {
    opacity: 0.3;
}

.gallery__image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-normal);
}

.gallery__item:hover .gallery__image,
.gallery__item:focus-within .gallery__image {
    transform: scale(1.02);
}

.gallery__info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-sm);
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    z-index: 2;
}

.gallery__title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.gallery__meta {
    font-size: 0.75rem;
    color: var(--color-muted);
}

.gallery__location {
    font-size: 0.7rem;
    color: var(--color-muted);
    margin-top: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Loading state */
.gallery__loading {
    text-align: center;
    padding: var(--space-lg);
    font-size: 0.875rem;
    color: var(--color-muted);
}

.loading__text::after {
    content: '';
    animation: dots 1.5s infinite;
}

@keyframes dots {
    0%, 20% { content: ''; }
    40% { content: '.'; }
    60% { content: '..'; }
    80%, 100% { content: '...'; }
}

.gallery__empty {
    text-align: center;
    padding: var(--space-xl);
    color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   Lightbox
   -------------------------------------------------------------------------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background-color: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.lightbox:not([hidden]) {
    opacity: 1;
    visibility: visible;
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
    position: absolute;
    z-index: 10;
    font-size: 2rem;
    padding: var(--space-sm);
    transition: opacity var(--transition-fast);
}

.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
    opacity: 0.6;
}

.lightbox__close {
    top: var(--space-sm);
    right: var(--space-sm);
}

.lightbox__prev {
    left: var(--space-sm);
    top: 50%;
    transform: translateY(-50%);
}

.lightbox__next {
    right: var(--space-sm);
    top: 50%;
    transform: translateY(-50%);
}

.lightbox__content {
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lightbox__image {
    max-width: 100%;
    max-height: calc(90vh - 100px);
    object-fit: contain;
}

.lightbox__caption {
    text-align: center;
    padding: var(--space-md);
    max-width: 600px;
}

.caption__title {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.caption__meta {
    font-size: 0.75rem;
    color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   About Page
   -------------------------------------------------------------------------- */
.about {
    padding: var(--space-lg) 0;
}

.about__intro {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

@media (min-width: 768px) {
    .about__intro {
        flex-direction: row;
        align-items: flex-start;
    }

    .about__portrait {
        flex: 0 0 300px;
    }

    .about__bio {
        flex: 1;
    }
}

.about__image {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    object-fit: cover;
    filter: grayscale(100%);
}

.about__name {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--space-xs);
}

.about__tagline {
    font-size: 0.875rem;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.about__text {
    margin-bottom: var(--space-sm);
    max-width: 60ch;
}

.about__section-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--color-border);
}

.about__equipment,
.about__contact {
    margin-bottom: var(--space-lg);
}

.equipment__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.equipment__item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

@media (min-width: 600px) {
    .equipment__item {
        flex-direction: row;
        gap: var(--space-md);
    }

    .equipment__label {
        flex: 0 0 120px;
    }
}

.equipment__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
}

.equipment__value {
    font-size: 0.875rem;
}

.contact__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.contact__item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

@media (min-width: 600px) {
    .contact__item {
        flex-direction: row;
        gap: var(--space-md);
    }

    .contact__label {
        flex: 0 0 120px;
    }
}

.contact__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
}

.contact__link {
    font-size: 0.875rem;
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: opacity var(--transition-fast);
}

.contact__link:hover {
    opacity: 0.6;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-md);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer__copyright {
    font-size: 0.75rem;
    color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
[hidden] {
    display: none !important;
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--color-fg);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}