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

:root {
    --color-bg:         #0f0f0f;
    --color-surface:    #1a1a1a;
    --color-surface-2:  #242424;
    --color-border:     #2e2e2e;
    --color-text:       #f0f0f0;
    --color-text-muted: #888;
    --color-accent:     #e8a020;
    --color-accent-hover: #f0b030;
    --color-success:    #2d6a2d;
    --color-success-text: #a8f0a8;
    --color-error:      #6a2d2d;
    --color-error-text: #f0a8a8;
    --radius:           10px;
    --radius-sm:        6px;
    --font:             'Segoe UI', system-ui, -apple-system, sans-serif;
    --transition:       0.2s ease;
    --max-width:        1400px;
    --header-height:    60px;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a:hover {
    color: var(--color-accent-hover);
}

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

/* ─── Header ─────────────────────────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 15, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: -0.02em;
}

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

.header-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* ─── Buttons ────────────────────────────────────────────────────────────────── */
.btn-upload {
    background: var(--color-accent);
    color: #000;
    font-weight: 600;
    padding: 0.45rem 1.1rem;
    border-radius: var(--radius-sm);
    transition: background var(--transition), transform var(--transition);
}

.btn-upload:hover {
    background: var(--color-accent-hover);
    color: #000;
    transform: translateY(-1px);
}

.btn-submit {
    width: 100%;
    background: var(--color-accent);
    color: #000;
    font-size: 1rem;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

.btn-submit:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
}

/* ─── Alerts ─────────────────────────────────────────────────────────────────── */
.alert {
    padding: 0.85rem 1.2rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.alert-success {
    background: var(--color-success);
    color: var(--color-success-text);
    border: 1px solid #3a8a3a;
}

.alert-error {
    background: var(--color-error);
    color: var(--color-error-text);
    border: 1px solid #8a3a3a;
}

/* ─── Gallery Page ───────────────────────────────────────────────────────────── */
.gallery-page {
    flex: 1;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.gallery-grid {
    columns: 4 280px;
    column-gap: 1rem;
    gap: 1rem;
}

.gallery-item {
    break-inside: avoid;
    margin-bottom: 1rem;
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: transform var(--transition), border-color var(--transition);
}

.gallery-item:hover {
    transform: translateY(-3px);
    border-color: var(--color-accent);
}

.gallery-link {
    display: block;
    overflow: hidden;
}

.gallery-link img {
    width: 100%;
    height: auto;
    transition: transform 0.3s ease;
    object-fit: cover;
}

.gallery-link:hover img {
    transform: scale(1.03);
}

.gallery-item figcaption {
    padding: 0.6rem 0.8rem 0.2rem;
    font-size: 0.9rem;
    color: var(--color-text);
    line-height: 1.4;
}

.gallery-item .upload-time {
    display: block;
    padding: 0.2rem 0.8rem 0.6rem;
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

/* ─── Lightbox ───────────────────────────────────────────────────────────────── */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    cursor: zoom-out;
}

.lightbox-content {
    position: relative;
    z-index: 1;
    max-width: min(90vw, 1200px);
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: var(--radius);
    object-fit: contain;
    box-shadow: 0 25px 80px rgba(0,0,0,0.8);
}

.lightbox-close {
    position: absolute;
    top: -2.5rem;
    right: 0;
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    padding: 0.25rem 0.5rem;
    transition: color var(--transition);
}

.lightbox-close:hover {
    color: var(--color-accent);
}

/* ─── Pagination ─────────────────────────────────────────────────────────────── */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.page-btn {
    background: var(--color-surface);
    color: var(--color-text);
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    font-weight: 500;
    transition: all var(--transition);
}

.page-btn:hover {
    background: var(--color-accent);
    color: #000;
    border-color: var(--color-accent);
}

.page-info {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ─── Upload Page ────────────────────────────────────────────────────────────── */
.upload-page {
    flex: 1;
    max-width: 580px;
    width: 100%;
    margin: 3rem auto;
    padding: 0 1.5rem;
}

.upload-page h1 {
    font-size: 2rem;
    margin-bottom: 0.4rem;
    color: var(--color-accent);
}

.subtitle {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.upload-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.4rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="file"] {
    width: 100%;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    padding: 0.6rem 0.8rem;
    font-size: 0.95rem;
    transition: border-color var(--transition);
}

.form-group input[type="text"]:focus,
.form-group input[type="file"]:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-group small {
    display: block;
    margin-top: 0.35rem;
    color: var(--color-text-muted);
    font-size: 0.82rem;
}

.required { color: var(--color-accent); }
.optional { color: var(--color-text-muted); font-weight: 400; font-size: 0.85rem; }

/* ─── Honeypot ───────────────────────────────────────────────────────────────── */
.honeypot {
    position: absolute;
    left: -9999px;
    top: -9999px;
    opacity: 0;
    pointer-events: none;
    tab-index: -1;
}

/* ─── Empty State ────────────────────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 5rem 1rem;
    color: var(--color-text-muted);
}

.empty-state p:first-child {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-state h2 {
    font-size: 1.6rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.empty-state .btn-upload {
    display: inline-block;
    margin-top: 1.5rem;
}

/* ─── Footer ─────────────────────────────────────────────────────────────────── */
.site-footer {
    text-align: center;
    padding: 1.5rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: auto;
}

.site-footer a {
    color: var(--color-text-muted);
}

.site-footer a:hover {
    color: var(--color-accent);
}

footer a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .gallery-grid {
        columns: 2 160px;
    }

    .upload-page {
        margin: 1.5rem auto;
    }

    .upload-form {
        padding: 1.25rem;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        columns: 1;
    }

    .logo {
        font-size: 1.2rem;
    }
}

/* ─── About Page ─────────────────────────────────────────────────────────────── */
.about-page {
    max-width: 860px;
    width: 100%;
    margin: 3rem auto;
    padding: 0 1.5rem;
}

.about-hero {
    text-align: center;
    margin-bottom: 2rem;
    padding: 3rem 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.about-hero h1 {
    font-size: 2.4rem;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.about-lead {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.about-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.about-section h2 {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.about-section p {
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 1rem;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.about-section a {
    color: var(--color-accent);
}

.about-section a:hover {
    color: var(--color-accent-hover);
}

/* ─── About Cards ────────────────────────────────────────────────────────────── */
.about-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
    text-align: left;
}

.about-card {
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    transition: border-color var(--transition), transform var(--transition);
}

.about-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.about-card-icon {
    font-size: 1.8rem;
    display: block;
    margin-bottom: 0.6rem;
}

.about-card h3 {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.about-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin: 0;
    text-align: left;
}

/* ─── About Steps ────────────────────────────────────────────────────────────── */
.about-steps {
    padding-left: 1.5rem;
    margin: 1rem auto;
    max-width: 600px;
    text-align: left;
    display: inline-block;
}

.about-steps li {
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
}

.about-steps li strong {
    color: var(--color-accent);
}

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
    .about-hero {
        padding: 2rem 1.25rem;
    }

    .about-hero h1 {
        font-size: 1.8rem;
    }

    .about-section {
        padding: 1.5rem 1.25rem;
    }

    .about-cards {
        grid-template-columns: 1fr;
    }
}