* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;

    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-base: 1rem;

    --radius: 4px;
    --radius-sm: 3px;

    --logo-purple: #6b5b7a;
    --logo-purple-dark: #544868;
    --logo-green: #9edc5c;
    --logo-green-light: #b4e87a;
    --logo-teal: #a8c8c8;
    --logo-pink: #fff0f5;

    --color-bg: #fafafa;
    --color-bg-card: #ffffff;
    --color-text: #333333;
    --color-text-muted: #666666;
    --color-text-faint: #999999;
    --color-link: var(--logo-purple);
    --color-link-hover: var(--logo-purple-dark);
    --color-border: #dddddd;
    --color-input-bg: #ffffff;
    --color-btn-bg: #f5f5f5;
    --color-btn-hover: #eeeeee;
    --color-tag-bg: #f0f0f0;
    --color-tag-hover: #e0e0e0;
    --color-error-bg: #fff0f0;
    --color-error-text: #cc0000;
    --color-private-badge: #666666;
    --color-authenticated-badge: #92400e;
    --color-authenticated-badge-bg: #fef3c7;
}

.dark-theme {
    --color-bg: #1a1a1a;
    --color-bg-card: #2a2a2a;
    --color-text: #e0e0e0;
    --color-text-muted: #a0a0a0;
    --color-text-faint: #707070;
    --color-link: var(--logo-green);
    --color-link-hover: var(--logo-green-light);
    --color-border: #404040;
    --color-input-bg: #333333;
    --color-btn-bg: #3a3a3a;
    --color-btn-hover: #4a4a4a;
    --color-tag-bg: #3a3a3a;
    --color-tag-hover: #4a4a4a;
    --color-error-bg: #3a2020;
    --color-error-text: #ff6666;
    --color-private-badge: #888888;
    --color-authenticated-badge: #fbbf24;
    --color-authenticated-badge-bg: #3a3020;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

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

a:hover {
    text-decoration: underline;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
}

header h1 {
    font-size: 1.5rem;
}

header h1 a {
    color: inherit;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.site-logo {
    height: 1.5em;
    width: auto;
}

nav {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

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

.search-form input {
    padding: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    width: 100%;
    min-width: 120px;
    max-width: 200px;
    background: var(--color-input-bg);
    color: var(--color-text);
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-btn-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    cursor: pointer;
    font-size: var(--font-sm);
}

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

.btn.primary {
    background: var(--color-link);
    border-color: var(--color-link);
    color: white;
}

.btn.primary:hover {
    background: var(--color-link-hover);
}

.dark-theme .btn.primary,
.dark-theme .btn.active {
    color: var(--color-bg);
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: var(--font-sm);
    padding: 0;
}

.btn-link:hover {
    color: var(--color-text);
    text-decoration: underline;
}

.user-info {
    color: var(--color-text-muted);
    font-size: var(--font-sm);
}

.logout-form {
    display: inline;
}

.error {
    color: var(--color-error-text);
    background: var(--color-error-bg);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.errors {
    margin-bottom: 1rem;
}

.auth-link {
    margin-top: 1.5rem;
    color: var(--color-text-muted);
}

.layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
}

.sidebar h2 {
    font-size: var(--font-sm);
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.tag-clear {
    display: block;
    font-size: var(--font-xs);
    margin-bottom: 0.5rem;
}

.tag-list {
    list-style: none;
}

.tag-list li {
    margin-bottom: 0.25rem;
}

.tag-list a {
    color: var(--color-text-muted);
    font-size: var(--font-sm);
}

.tag-list a.active {
    color: var(--color-link);
    font-weight: bold;
}

.tag-list .count {
    color: var(--color-text-faint);
}

.bookmark-list {
    list-style: none;
}

.bookmark-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

.bookmark-header {
    margin-bottom: 0.5rem;
}

.bookmark-title {
    font-size: 1.125rem;
    font-weight: 500;
    display: block;
}

.bookmark-url {
    font-size: var(--font-xs);
    color: var(--color-text-faint);
}

.bookmark-description {
    color: var(--color-text-muted);
    font-size: var(--font-sm);
    margin-bottom: 0.5rem;
}

.bookmark-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-xs);
}

.bookmark-tags {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.bookmark-tags .tag {
    background: var(--color-tag-bg);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

.bookmark-tags .tag:hover {
    background: var(--color-tag-hover);
    text-decoration: none;
}

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

.action {
    color: var(--color-text-faint);
    background: none;
    border: none;
    cursor: pointer;
    font-size: var(--font-xs);
}

.action:hover {
    color: var(--color-text-muted);
}

.action.delete:hover {
    color: var(--color-error-text);
}

.bookmark-date {
    display: block;
    font-size: var(--font-xs);
    color: var(--color-text-faint);
    margin-top: 0.5rem;
}

.empty {
    color: var(--color-text-muted);
    text-align: center;
    padding: 2rem;
}

.search-info {
    margin-bottom: 1rem;
    color: var(--color-text-muted);
}

.announcement {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

.announcement p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    line-height: 1.5;
}

.announcement p + p {
    margin-top: 0.5rem;
}

.announcement strong {
    color: var(--color-text);
}

.form-container {
    max-width: 600px;
}

.form-container h2 {
    margin-bottom: 1.5rem;
}

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

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

.form-group .hint {
    font-weight: normal;
    color: var(--color-text-faint);
    font-size: var(--font-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-input-bg);
    color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-link);
}

.form-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: 1.5rem;
}

/* mobile */
@media (max-width: 768px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        order: 2;
    }

    header {
        flex-direction: column;
        gap: var(--space-md);
        align-items: flex-start;
    }

    nav {
        flex-wrap: wrap;
    }

    .search-form {
        order: 99;
        width: 100%;
        margin-top: 0.5rem;
    }

    .user-info {
        margin-left: auto;
    }

    .user-info,
    .logout-form .btn-link {
        font-size: var(--font-sm);
        line-height: 1.5;
    }

    .bookmark-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    .btn {
        min-height: 44px;
        padding: 0.75rem 1rem;
    }

    .bookmark-tags .tag {
        padding: 0.5rem 0.75rem;
    }

    .action {
        padding: 0.5rem;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }

    .bookmark-url,
    .bookmark-footer,
    .bookmark-author,
    .bookmark-meta,
    .action,
    time {
        font-size: 0.8125rem;
    }

    .private-badge,
    .visibility-badge {
        font-size: 0.6875rem;
    }

    .sidebar .tag-list {
        display: flex;
        flex-wrap: wrap;
        gap: var(--space-sm);
    }

    .sidebar .tag-list li {
        margin-bottom: 0;
    }
}

/* for smaller phones */
@media (max-width: 480px) {
    body {
        padding: 0.5rem;
    }

    header h1 {
        font-size: 1.25rem;
    }

    .site-logo {
        height: 1.25em;
    }

    nav {
        flex-wrap: wrap;
        gap: var(--space-sm);
        width: 100%;
    }

    .search-form {
        width: 100%;
    }

    .search-form input {
        max-width: none;
        flex: 1;
    }

    footer {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }

    .footer-links {
        gap: var(--space-md);
    }
}

.visibility-badge {
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    margin-left: 0.5rem;
    text-transform: uppercase;
}

.visibility-badge.private {
    background: var(--color-private-badge);
    color: white;
}

.visibility-badge.authenticated {
    background: var(--color-authenticated-badge-bg);
    color: var(--color-authenticated-badge);
}

.bookmark-footer {
    display: flex;
    gap: var(--space-md);
    font-size: var(--font-xs);
    color: var(--color-text-faint);
    margin-top: 0.5rem;
}

.bookmark-author {
    color: var(--color-text-muted);
}

.btn.active {
    background: var(--color-link);
    border-color: var(--color-link);
    color: white;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: 0.25rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    font-weight: normal;
}

.radio-label input[type="radio"] {
    width: auto;
    margin: 0;
}

.radio-label .hint {
    margin-left: 0.25rem;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--color-text-muted);
    font-size: 1.25rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    color: var(--color-text);
}

.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: inline;
}

.dark-theme .theme-toggle .icon-sun {
    display: inline;
}

.dark-theme .theme-toggle .icon-moon {
    display: none;
}

footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    margin-top: 3rem;
    border-top: 1px solid var(--color-border);
    font-size: var(--font-sm);
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

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

.footer-links a:hover {
    color: var(--color-link);
}

.footer-copyright {
    color: var(--color-text-faint);
}

.static-page {
    max-width: 700px;
}

.static-page h2 {
    margin-bottom: 1.5rem;
}

.static-page h3 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-size: 1.125rem;
}

.static-page p,
.static-page li {
    color: var(--color-text-muted);
}

.static-page p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.static-page ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.static-page li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

#load-more-container {
    text-align: center;
    margin-top: 1.5rem;
}

.load-more-btn {
    padding: 0.75rem 2rem;
    transition: background-color 0.15s ease;
}

.load-more-btn.htmx-request {
    opacity: 0.6;
    cursor: wait;
}

/* Home page two-column layout */
.home-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.home-left h2,
.home-right h2 {
    font-size: var(--font-sm);
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.tag-section {
    margin-bottom: 1.5rem;
}

.tag-section h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.tag-section h3 a {
    color: var(--color-link);
}

.tag-section .tag-count {
    color: var(--color-text-faint);
    font-weight: normal;
}

.compact-bookmark-list {
    list-style: none;
}

.compact-bookmark-list li {
    padding: 0.375rem 0;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--space-sm);
}

.compact-bookmark-link {
    font-size: var(--font-sm);
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.save-count {
    color: var(--color-text-faint);
    font-size: var(--font-xs);
    flex-shrink: 0;
}

.empty-tag {
    color: var(--color-text-faint);
    font-size: var(--font-sm);
    font-style: italic;
}

/* Home page mobile */
@media (max-width: 768px) {
    .home-layout {
        grid-template-columns: 1fr;
    }

    .home-left {
        order: 2;
    }

    .home-right {
        order: 1;
    }
}