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

[hidden] { display: none !important; }

:root {
    --bg: #ffffff;
    --text: #1c1c1e;
    --muted: #6e6e73;
    --border: #d1d1d6;
    --accent: #0071e3;

    --danger:         #dc2626;
    --danger-bg:      #fef2f2;
    --danger-border:  #fecaca;

    --warning:        #d97706;
    --warning-bg:     #fffbeb;
    --warning-border: #fde68a;

    --success:        #16a34a;
    --success-bg:     #f0fdf4;
    --success-border: #bbf7d0;

    --info:           #0284c7;
    --info-bg:        #eff6ff;
    --info-border:    #bfdbfe;
    --max-w: 768px;
    --radius: 8px;
    --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
    font-family: var(--font);
    background: var(--bg) url('/images/ts-bg.png') center center / cover fixed;
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* ===========================
   Layout
   =========================== */
.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===========================
   Admin Bar (public page)
   =========================== */
.admin-bar {
    background: #1c1c1e;
    color: #ffffffcc;
    font-size: 0.8125rem;
    padding: 0.4rem 0;
}

.admin-bar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-bar a {
    color: #fff;
    text-decoration: none;
    opacity: 0.8;
}

.admin-bar a:hover {
    opacity: 1;
}

/* ===========================
   Public Site
   =========================== */
.site {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: var(--max-w);
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.12);
}

.site-header {
    padding: 0.5rem;
}

.site-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.site-tagline {
    margin-top: 0.4rem;
    color: var(--muted);
    font-size: 1rem;
}

.site-main {
    flex: 1;
    padding: 2.5rem 0;
}

.content-section {
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border);
}

.content-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.content-section h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.section-body {
    color: var(--muted);
    font-size: 0.9375rem;
}

.lang-switcher {
    display: flex;
    gap: 0.25rem;
    padding-top: 0.25rem;
    flex-shrink: 0;
}

.lang-btn {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    padding: 0.2rem 0.45rem;
    border-radius: 4px;
    text-decoration: none;
    color: var(--muted);
    transition: background 0.15s, color 0.15s;
}

.lang-btn:hover {
    background: #f0f0f2;
    color: var(--text);
}

.lang-active {
    background: #f0f0f2;
    color: var(--text);
    cursor: default;
}

.site-footer {
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.875rem;
}

/* ===========================
   Form Elements
   =========================== */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--muted);
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group textarea {
    width: 100%;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9375rem;
    font-family: var(--font);
    color: var(--text);
    background: #fff;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.12);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.url-preview {
    margin-top: 0.4rem;
    font-family: ui-monospace, monospace;
    font-size: 0.8125rem;
    color: var(--muted);
}

.url-preview-origin {
    opacity: 0.6;
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--font);
    cursor: pointer;
    border: 1px solid transparent;
    text-decoration: none;
    transition: background 0.15s;
    line-height: 1;
}

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

.btn-primary:hover { background: #0077ed; }

.btn-ghost {
    background: transparent;
    color: var(--muted);
    border-color: var(--border);
}

.btn-ghost:hover { background: #f5f5f7; }

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

.btn-danger:hover { background: var(--danger-bg); }

.btn-sm {
    padding: 0.3rem 0.6rem;
    font-size: 0.8125rem;
}

/* ===========================
   Flash Message
   =========================== */
.alert {
    padding: 0.7rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success-border);
}

.alert-error {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid var(--danger-border);
}

.alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid var(--warning-border);
}

.alert-info {
    background: var(--info-bg);
    color: var(--info);
    border: 1px solid var(--info-border);
}

/* ===========================
   Admin – Login
   =========================== */
.admin-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f5f7;
}

.login-box {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem 2.5rem;
    width: 100%;
    max-width: 360px;
}

.login-box h1 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

/* ===========================
   Admin – Dashboard
   =========================== */
.admin-layout {
    min-height: 100vh;
    background: #f5f5f7;
}

.admin-topbar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 0.875rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 10;
}

.admin-nav {
    display: flex;
    gap: 0.25rem;
}

.admin-nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--muted);
    text-decoration: none;
    padding: 0.3rem 0.65rem;
    border-radius: 6px;
    transition: background 0.15s, color 0.15s;
}

.admin-nav-link:hover {
    background: #f5f5f7;
    color: var(--text);
}

.admin-nav-link.active {
    background: #f5f5f7;
    color: var(--text);
    font-weight: 600;
}

.admin-content {
    max-width: 780px;
    margin: 2rem auto;
    padding: 0 1.5rem 3rem;
}

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.section-card {
    background: #fafafa;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem;
    margin-bottom: 0.75rem;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.section-num {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* ===========================
   Admin – Version History
   =========================== */
.versions-summary {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.versions-summary::-webkit-details-marker { display: none; }

.versions-summary::before {
    content: '▶';
    display: inline-block;
    font-size: 0.6rem;
    margin-right: 0.5rem;
    transition: transform 0.15s;
}

details[open] .versions-summary::before {
    transform: rotate(90deg);
}

.version-list {
    margin-top: 0.75rem;
}

.version-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 0;
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
}

.version-ts {
    font-family: ui-monospace, monospace;
    font-size: 0.8125rem;
}

/* ===========================
   Admin – Compare
   =========================== */
.compare-columns-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 0.25rem;
}

.compare-col-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.compare-section {
    margin-bottom: 1rem;
}

.compare-lang-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--muted);
    margin-bottom: 0.35rem;
}

.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.compare-textarea {
    width: 100%;
    min-height: 180px;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.875rem;
    font-family: var(--font);
    color: var(--text);
    background: #fafafa;
    resize: vertical;
    outline: none;
}

.compare-same {
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.875rem;
    color: var(--muted);
    background: #fafafa;
    white-space: pre-wrap;
    word-break: break-word;
}

/* ===========================
   Admin – Page List
   =========================== */
.page-list {
    margin-top: 1rem;
}

.page-item {
    padding: 1rem 0;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.5rem;
}

.page-item:first-child {
    border-top: none;
    padding-top: 0;
}

.page-item-body {
    flex: 1;
    min-width: 0;
}

.page-slug {
    font-family: ui-monospace, monospace;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text);
}

.page-slug a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid var(--border);
}

.page-slug a:hover {
    border-bottom-color: var(--text);
}

.page-excerpt {
    color: var(--muted);
    font-size: 0.875rem;
    margin-top: 0.3rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.page-meta {
    display: flex;
    gap: 1.25rem;
    margin-top: 0.5rem;
}

.page-meta-item {
    font-size: 0.75rem;
    color: var(--muted);
}

.page-meta-item span {
    display: block;
    font-weight: 500;
    color: var(--text);
    opacity: 0.6;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.6875rem;
    margin-bottom: 0.1rem;
}

/* ===========================
   Checkbox label
   =========================== */
.checkbox-label {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    font-size: 0.875rem;
    cursor: pointer;
}

/* ===========================
   User badges
   =========================== */
.user-badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    vertical-align: middle;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-superuser {
    background: var(--info-bg);
    color: var(--info);
    border: 1px solid var(--info-border);
}

.badge-developer {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid var(--warning-border);
}

.text-danger   { color: var(--danger); }
.text-warning  { color: var(--warning); }
.text-success  { color: var(--success); }
.text-info     { color: var(--info); }
.text-muted    { color: var(--muted); }

.page-item-actions {
    display: flex;
    gap: 0.4rem;
    flex-shrink: 0;
    padding-top: 0.1rem;
}