/* =============================================
   USN Utlånssystem – Global Styles
   ============================================= */

:root {
    --usn-navy:      #1e3a5f;
    --usn-navy-dark: #152b47;
    --usn-amber:     #e8a020;
    --usn-light:     #f4f6f9;
    --usn-border:    #dde3ea;
    --usn-text:      #2c3e50;
    --usn-muted:     #6c7a89;

    /* Semantic tokens – light theme defaults */
    --bg-page:       var(--usn-light);
    --bg-card:       #fff;
    --bg-table-row-hover: #eef2f7;
    --text-primary:  var(--usn-text);
    --text-muted:    var(--usn-muted);
    --border-color:  var(--usn-border);
}

/* ── Dark theme overrides ──────────────────── */
[data-theme="dark"] {
    --bg-page:       #0d1117;
    --bg-card:       #161b22;
    --bg-table-row-hover: #1c2128;
    --text-primary:  #9eaab6;
    --text-muted:    #6a7785;
    --border-color:  #30363d;
    --usn-light:     #0d1117;
    --usn-border:    #30363d;
    --usn-text:      #9eaab6;
    --usn-muted:     #6a7785;
    color-scheme:    dark;

    /* Override Bootstrap's own CSS variables */
    --bs-body-bg:           #0d1117;
    --bs-body-color:        #9eaab6;
    --bs-border-color:      #30363d;
    --bs-table-bg:          transparent;
    --bs-table-striped-bg:  #1c2128;
    --bs-table-hover-bg:    #1c2128;
    --bs-card-bg:           #161b22;
    --bs-card-border-color: #30363d;
    --bs-form-control-bg:   #161b22;
    --bs-input-bg:          #161b22;
}

/* ── Dark mode: toggle button ──────────────── */
#darkModeToggle {
    background: transparent;
    border: 1.5px solid rgba(255,255,255,0.35);
    border-radius: 20px;
    color: rgba(255,255,255,0.82);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    padding: 0.3rem 0.7rem;
    margin-left: 0.5rem;
    transition: background 0.15s, border-color 0.15s;
}
#darkModeToggle:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.6);
}

html {
    font-size: 15px;
    height: 100%;
}

@media (min-width: 768px) {
    html { font-size: 16px; }
}

body {
    background-color: var(--bg-page);
    color: var(--text-primary);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
    transition: background-color 0.2s, color 0.2s;
}

/* ── Focus rings ───────────────────────────── */
.btn:focus, .btn:active:focus,
.form-control:focus, .form-check-input:focus,
.form-select:focus {
    box-shadow: 0 0 0 0.2rem rgba(30, 58, 95, 0.25);
    border-color: var(--usn-navy);
    outline: none;
}

/* ── Navbar ────────────────────────────────── */
.navbar {
    background-color: var(--usn-navy) !important;
    box-shadow: 0 2px 8px rgba(0,0,0,0.18);
    padding: 0.6rem 1rem;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.15rem;
    color: #fff !important;
    letter-spacing: 0.02em;
}

.navbar-brand span {
    color: var(--usn-amber);
}

.navbar-toggler {
    border-color: rgba(255,255,255,0.4);
}
.navbar-toggler-icon {
    filter: invert(1);
}

.nav-link {
    color: rgba(255,255,255,0.82) !important;
    font-size: 0.9rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
}
.nav-link:hover, .nav-link.active {
    color: #fff !important;
    background-color: rgba(255,255,255,0.12);
}

/* ── Main content wrapper ──────────────────── */
.site-content {
    flex: 1;
    padding-top: 2rem;
    padding-bottom: 3rem;
}

/* ── Page header ───────────────────────────── */
.page-header {
    margin-bottom: 1.75rem;
}
.page-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--usn-navy);
    margin: 0;
}
.page-header .subtitle {
    color: var(--usn-muted);
    font-size: 0.9rem;
    margin-top: 0.2rem;
}

/* ── Cards ─────────────────────────────────── */
.usn-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(30,58,95,0.07);
    padding: 1.75rem 2rem;
    margin-bottom: 1.5rem;
}

/* ── Tables ────────────────────────────────── */
.table {
    background: var(--bg-card);
    color: var(--text-primary);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(30,58,95,0.07);
    border: 1px solid var(--border-color);
    margin-bottom: 0;
}
.table thead th {
    background-color: var(--usn-navy);
    color: #fff;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border: none;
    padding: 0.85rem 1rem;
}
.table tbody tr {
    transition: background 0.1s;
}
.table tbody tr:hover {
    background-color: var(--bg-table-row-hover);
}
.table tbody td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
    border-color: var(--border-color);
    font-size: 0.95rem;
    color: var(--text-primary);
}
.table-wrapper {
    border-radius: 10px;
    overflow: hidden;
}

/* ── Badges ────────────────────────────────── */
.badge-available {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.3em 0.7em;
    border-radius: 20px;
}
.badge-unavailable {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.3em 0.7em;
    border-radius: 20px;
}
.badge-loan-active {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.3em 0.7em;
    border-radius: 20px;
}

/* ── Buttons ───────────────────────────────── */
.btn-usn {
    display: inline-block;
    background-color: var(--usn-navy);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    padding: 0.45rem 1.1rem;
    cursor: pointer;
    transition: background 0.15s;
}
.btn-usn:hover {
    background-color: var(--usn-navy-dark);
    color: #fff;
}
.btn-outline-usn {
    display: inline-block;
    color: var(--usn-navy);
    border: 1.5px solid var(--usn-navy);
    border-radius: 6px;
    font-weight: 500;
    padding: 0.4rem 1rem;
    background: transparent;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}
.btn-outline-usn:hover {
    background-color: var(--usn-navy);
    color: #fff;
}

/* ── Action links in tables ────────────────── */
.table-actions a {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-right: 0.4rem;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    text-decoration: none;
    cursor: pointer;
}
.table-actions a:last-child { margin-right: 0; }
.action-edit   { color: var(--usn-navy); }
.action-detail { color: #0069a8; }
.action-delete { color: #c0392b; }
.action-return { color: #c0392b; }
.action-edit:hover   { text-decoration: underline; }
.action-detail:hover { text-decoration: underline; }
.action-delete:hover { text-decoration: underline; }
.action-return:hover { text-decoration: underline; }

/* ── Forms ─────────────────────────────────── */
.form-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}
.form-control, .form-select {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    padding: 0.45rem 0.75rem;
}
.form-control:focus, .form-select:focus {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--usn-navy);
}

/* ── Detail list ───────────────────────────── */
.detail-list dt {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding-top: 0.6rem;
}
.detail-list dd {
    font-size: 1rem;
    color: var(--text-primary);
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--border-color);
    margin-left: 0;
}
.detail-list dd:last-child { border-bottom: none; }

/* ── Home hero ─────────────────────────────── */
.hero {
    background: linear-gradient(135deg, var(--usn-navy) 0%, #2a5298 100%);
    border-radius: 12px;
    color: #fff;
    padding: 3rem 2.5rem;
    margin-bottom: 2rem;
}
.hero h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}
.hero p {
    color: rgba(255,255,255,0.8);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}
.hero-links a {
    display: inline-block;
    margin-right: 0.75rem;
    margin-bottom: 0.5rem;
    padding: 0.65rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.15s;
}
.hero-links a:hover { opacity: 0.88; }
.hero-link-primary {
    background-color: var(--usn-amber);
    color: #1a1a1a;
}
.hero-link-secondary {
    background-color: rgba(255,255,255,0.15);
    color: #fff;
    border: 1.5px solid rgba(255,255,255,0.4);
}

/* ── Stats row on home ─────────────────────── */
.stat-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.25rem 1.5rem;
    text-align: center;
    box-shadow: 0 2px 6px rgba(30,58,95,0.06);
    transition: box-shadow 0.15s, border-color 0.15s, transform 0.15s;
    cursor: pointer;
}
.stat-card:hover {
    box-shadow: 0 4px 14px rgba(30,58,95,0.15);
    border-color: var(--usn-navy);
    transform: translateY(-2px);
}
.stat-card .stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--usn-navy);
    line-height: 1;
}
.stat-card .stat-label {
    font-size: 0.82rem;
    color: var(--usn-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.3rem;
}

/* ── Footer ────────────────────────────────── */
footer {
    background-color: var(--usn-navy);
    color: rgba(255,255,255,0.6);
    font-size: 0.85rem;
    padding: 1rem 0;
    margin-top: auto;
}
footer a { color: rgba(255,255,255,0.8); }
footer a:hover { color: #fff; }

/* ── Alert tweaks ──────────────────────────── */
.alert {
    border-radius: 8px;
    font-size: 0.95rem;
}

/* ── Validation ────────────────────────────── */
.text-danger { font-size: 0.85rem; }

/* ── Dark mode: Bootstrap overrides ───────── */
[data-theme="dark"] .page-header h1 {
    color: #8ab4d8;
}
[data-theme="dark"] .alert-info {
    background-color: #1a3550;
    color: #a8c8e8;
    border-color: #2a4d6e;
}
[data-theme="dark"] .alert-warning {
    background-color: #3a2d00;
    color: #ffd97d;
    border-color: #5a4600;
}
[data-theme="dark"] .alert-danger {
    background-color: #3a1a1a;
    color: #f5a0a0;
    border-color: #5a2a2a;
}
[data-theme="dark"] .alert-success {
    background-color: #0f2e1a;
    color: #7dd8a0;
    border-color: #1a4a2a;
}
[data-theme="dark"] .badge-available {
    background-color: #0f2e1a;
    color: #7dd8a0;
    border-color: #1a4a2a;
}
[data-theme="dark"] .badge-unavailable {
    background-color: #3a1a1a;
    color: #f5a0a0;
    border-color: #5a2a2a;
}
[data-theme="dark"] .badge-loan-active {
    background-color: #3a2d00;
    color: #ffd97d;
    border-color: #5a4600;
}
/* Hvite flater → grå i dark mode */
[data-theme="dark"] .usn-card,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .table,
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: var(--bg-card) !important;
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .btn-outline-usn {
    color: #5b8fc9;
    border-color: #3d6a9e;
}
[data-theme="dark"] .btn-outline-usn:hover {
    background-color: #1f3a5c;
    color: #c9d1d9;
}

/* Lenker: dempet blå, ikke skriker */
[data-theme="dark"] a { color: #5b8fc9; }
[data-theme="dark"] a:hover { color: #79a8d8; }

/* Gul hero-knapp: teksten skal alltid være mørk, aldri blå */
[data-theme="dark"] .hero-link-primary {
    color: #1a1a1a !important;
}
[data-theme="dark"] .hero-link-primary:hover {
    color: #1a1a1a !important;
}

[data-theme="dark"] .action-edit   { color: #5b8fc9; }
[data-theme="dark"] .action-detail { color: #6aa3d4; }
[data-theme="dark"] .action-delete { color: #c96a6a; }
[data-theme="dark"] .action-return { color: #c96a6a; }
[data-theme="dark"] .stat-card .stat-number { color: #6aa3d4; }
[data-theme="dark"] .stat-card .stat-label  { color: #6a7785; }
[data-theme="dark"] .stat-card:hover        { border-color: #3d6a9e; }