:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-muted: #666;
    --color-border: #e0e0e0;
    --color-accent: #222;
    --color-accent-hover: #000;
    --color-focus: #000;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --max-width: 1200px;
}

*, *::before, *::after {
    box-sizing: border-box;
}

:focus {
    outline: none;
}

:focus-visible,
input:focus,
textarea:focus,
select:focus,
button:focus,
a:focus,
[contenteditable="true"]:focus {
    outline: 2px solid var(--color-focus);
    outline-offset: 1px;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

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

a:hover {
    text-decoration: underline;
}

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

/* Header */
.site-header {
    background: hsla(0, 0%, 100%, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-logo {
    position: relative;
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    line-height: 0;
    flex-shrink: 0;
}

.site-logo::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 50%;
    top: calc(100% + 0.5rem);
    transform: translateX(-50%) translateY(-4px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    padding: 0.35rem 0.65rem;
    background: var(--color-focus);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    border-radius: var(--radius-sm);
    transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
    z-index: 1;
}

.site-logo-mark {
    position: relative;
    display: block;
    height: 2.25rem;
}

.site-logo-idle,
.site-logo-hover {
    display: block;
    height: 2.25rem;
    width: auto;
    transition: opacity 0.15s ease;
}

.site-logo-hover {
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
}

.site-logo:hover,
.site-logo:focus-visible {
    text-decoration: none;
}

.site-logo:hover::after,
.site-logo:focus-visible::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.site-logo:hover .site-logo-idle,
.site-logo:focus-visible .site-logo-idle {
    opacity: 0;
}

.site-logo:hover .site-logo-hover,
.site-logo:focus-visible .site-logo-hover {
    opacity: 1;
}

.search-form {
    max-width: 240px;
    width: 100%;
    flex-shrink: 0;
}

.search-field {
    position: relative;
    display: flex;
    align-items: center;
}

.search-field input[type="search"] {
    width: 100%;
    padding: 0.5rem 0.75rem 0.5rem 2.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-surface);
    -webkit-appearance: none;
    appearance: none;
}

.search-field input[type="search"]::-webkit-search-cancel-button,
.search-field input[type="search"]::-webkit-search-decoration {
    -webkit-appearance: none;
    appearance: none;
}

.search-field.has-value input[type="search"] {
    padding-right: 2.25rem;
}

.search-icon-btn,
.search-clear-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    align-items: center;
    justify-content: center;
    padding: 2px;
    border: none;
    border-radius: 50%;
    background: none;
    color: var(--color-muted);
    cursor: pointer;
    line-height: 0;
}

.search-icon-btn {
    left: 0.65rem;
    display: flex;
}

.search-icon-btn:hover {
    color: var(--color-text);
    background: var(--color-bg);
}

.search-clear-btn {
    right: 0.65rem;
    display: none;
}

.search-clear-btn:not([hidden]) {
    display: flex;
}

.search-clear-btn:not([hidden]):hover {
    color: var(--color-text);
    background: var(--color-bg);
}

.btn-primary,
.btn-outline {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    cursor: pointer;
    border: 1px solid transparent;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1.25;
    text-decoration: none;
    box-sizing: border-box;
    appearance: none;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn-outline:hover {
    border-color: var(--color-accent);
    text-decoration: none;
}

/* Main */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.gallery-header {
    position: relative;
    min-height: 2.75rem;
    padding-right: calc(240px + 1.5rem);
    margin-bottom: 2rem;
}

.gallery-header-main {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    min-height: 2.75rem;
    padding-right: 1.5rem;
}

.gallery-header .search-form {
    position: absolute;
    top: 0;
    right: 0;
    max-width: 240px;
    width: 240px;
    margin: 0;
}

.gallery-header h1 {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 600;
    line-height: 1.2;
}

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

.gallery-meta {
    color: var(--color-muted);
    margin: 0;
}

.category-filter-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 8px 10px 8px 12px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 0.9rem;
    color: var(--color-text);
    text-decoration: none;
    line-height: 1;
    transition: border-color 0.2s, color 0.2s;
}

.category-filter-badge:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    text-decoration: none;
}

.category-filter-badge svg {
    flex-shrink: 0;
    color: var(--color-muted);
}

.category-filter-badge:hover svg {
    color: currentColor;
}

/* Masonry gallery */
.gallery {
    column-count: 3;
    column-gap: 1rem;
}

.gallery-item {
    break-inside: avoid;
    margin-bottom: 1.5rem;
}

.gallery-link {
    display: block;
    overflow: hidden;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-border);
}

.gallery-link img {
    width: 100%;
    transition: transform 0.3s ease;
    -webkit-filter: grayscale(100%); /* Safari 6.0 - 9.0 */
  filter: grayscale(100%);
}

.gallery-link:hover img {
    transform: scale(1.02);
    -webkit-filter: none; /* Safari 6.0 - 9.0 */
  filter: none;
}

.gallery-item-title {
    margin: 0.5rem 0 0.25rem;
    font-size: 1rem;
    font-weight: 500;
}

.gallery-item-title a {
    color: var(--color-text);
    text-decoration: none;
}

.gallery-item-title a:hover {
    text-decoration: underline;
}

.badges {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.badge {
    display: inline-block;
    padding: 0px 8px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--color-muted);
    text-decoration: none;
    transition: border-color 0.2s, color 0.2s;
}

.badge:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    text-decoration: none;
}

.gallery-sentinel {
    height: 1px;
}

.gallery-loading {
    text-align: center;
    color: var(--color-muted);
    padding: 1rem;
}

.gallery-end {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: var(--color-muted);
    padding: 80px 16px 16px 16px;
}

.gallery-back-top {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px;
    border: none;
    border-radius: 50%;
    background: none;
    color: var(--color-muted);
    cursor: pointer;
    line-height: 0;
}

.gallery-back-top:hover {
    color: var(--color-text);
    background: var(--color-bg);
}

.empty-state {
    text-align: center;
    color: var(--color-muted);
    padding: 3rem;
}

/* Photo detail */
.photo-detail figure {
    margin: 0 0 1.5rem;
    overflow: hidden;
}

.photo-detail img {
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.photo-detail h1 {
    margin: 0 0 0.75rem;
    font-size: 1.75rem;
}

.photo-description {
    color: var(--color-muted);
    max-width: 65ch;
}

.photo-detail .badges {
    margin-top: 1rem;
}

.rich-text-content p,
.rich-text-content ul,
.rich-text-content ol,
.rich-text-content blockquote,
.rich-text-content h2,
.rich-text-content h3 {
    margin: 0 0 1rem;
}

.rich-text-content ul,
.rich-text-content ol {
    padding-left: 1.25rem;
}

.rich-text-content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 0.15em;
    cursor: pointer;
}

.rich-text-content a:hover {
    color: var(--color-text);
}

.rich-text-content blockquote {
    border-left: 3px solid var(--color-border);
    padding-left: 1rem;
    color: var(--color-muted);
}

.back-link {
    display: inline-block;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 2rem 1.5rem;
    color: var(--color-muted);
    font-size: 0.85rem;
}

/* Subscribe modal */
dialog {
    border: 1px solid var(--color-border);
}

dialog::backdrop {
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.subscribe-modal {
    border-radius: var(--radius-md);
    padding: 0;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow);
}

.subscribe-modal form {
    padding: 1.5rem;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.25rem;
    line-height: 24px;
}

.modal-close {
    background: none;
    border: none;
    border-radius: 50%;
    color: var(--color-muted);
    cursor: pointer;
    line-height: 0;
    padding: 4px;
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close svg {
    display: block;
    width: 24px;
    height: 24px;
}

.modal-close:hover {
    color: var(--color-text);
    background: var(--color-bg);
}

.modal-desc {
    color: var(--color-muted);
    margin: 0 0 1rem;
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.form-group input[type="email"],
.form-group input[type="text"] {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
}

.form-message {
    font-size: 0.9rem;
    margin: 0 0 0.75rem;
    min-height: 1.2em;
}

.form-message.success {
    color: #2e7d32;
}

.form-message.error {
    color: #c62828;
}

.honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
    height: 0;
    overflow: hidden;
}

/* Error page */
.error-page {
    text-align: center;
    padding: 4rem 1rem;
}

.error-page h1 {
    font-size: 4rem;
    margin: 0;
}

/* Responsive */
@media (max-width: 900px) {
    .gallery {
        column-count: 2;
    }
}

@media (max-width: 560px) {
    .gallery {
        column-count: 1;
    }

    .gallery-header {
        display: flex;
        flex-direction: column;
        padding-right: 0;
        min-height: auto;
    }

    .gallery-header .search-form {
        order: 1;
        position: static;
        width: 100%;
        max-width: none;
        margin: 0;
    }

    .gallery-header-main {
        order: 2;
        min-height: auto;
        padding-right: 0;
        margin-top: 0.75rem;
    }

    .gallery-header h1 {
        font-size: 1.25rem;
    }
}

.unsubscribe-page {
    max-width: 520px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.unsubscribe-form .form-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.btn-danger {
    background: #dc2626;
    color: #fff;
}

.btn-danger:hover {
    background: #b91c1c;
}