/* =====================================================================
   QuizForge — Design System
   Concept: a graded exam paper. Warm paper background, ink-navy type,
   a gold "pencil" accent for actions, and a red-pen stamp for results.
   ===================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Spectral:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@500;700&display=swap');

:root {
    --ink:          #1B2A4A;
    --ink-soft:      #3A4A6B;
    --paper:        #FAF6EC;
    --paper-raised: #FFFFFF;
    --paper-line:   #E4DCC8;
    --gold:         #D69A2D;
    --gold-dark:    #B97F18;
    --green:        #2F8F6E;
    --green-bg:     #E6F3EE;
    --red:          #C1473D;
    --red-bg:       #FBEAE8;
    --muted:        #6F6A5C;

    --font-display: 'Spectral', Georgia, serif;
    --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono:    'JetBrains Mono', 'Courier New', monospace;

    --radius: 10px;
    --shadow-card: 0 1px 2px rgba(27,42,74,0.06), 0 8px 24px rgba(27,42,74,0.08);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
}

body {
    background: var(--paper);
    background-image:
        linear-gradient(var(--paper-line) 1px, transparent 1px);
    background-size: 100% 2.1rem;
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.55;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    color: var(--ink);
    margin: 0 0 0.5em;
    font-weight: 600;
    line-height: 1.2;
}

a { color: var(--ink); }
a:hover { color: var(--gold-dark); }

.container {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------------------------------------------------------------- nav */

.site-header {
    background: var(--paper-raised);
    border-bottom: 2px solid var(--ink);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.4rem;
    text-decoration: none;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.01em;
}

.brand .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: var(--gold);
    color: var(--ink);
    border-radius: 6px;
    font-size: 1rem;
    transform: rotate(-6deg);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 22px;
    font-size: 0.95rem;
    font-weight: 500;
}

.nav-links a {
    text-decoration: none;
    color: var(--ink-soft);
}

.nav-links a:hover { color: var(--ink); }

.nav-user-pill {
    background: var(--paper);
    border: 1px solid var(--paper-line);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 0.88rem;
    color: var(--ink-soft);
}

/* ---------------------------------------------------------------- main */

main { flex: 1; padding: 48px 0 64px; }

footer.site-footer {
    border-top: 1px solid var(--paper-line);
    padding: 22px 0;
    text-align: center;
    color: var(--muted);
    font-size: 0.85rem;
}

/* ---------------------------------------------------------------- buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 11px 22px;
    border-radius: 8px;
    border: 2px solid var(--ink);
    background: var(--ink);
    color: var(--paper-raised);
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.btn:hover { transform: translateY(-1px); box-shadow: 0 4px 0 0 rgba(27,42,74,0.15); color: var(--paper-raised); }
.btn:active { transform: translateY(0); box-shadow: none; }

.btn-gold {
    background: var(--gold);
    border-color: var(--gold-dark);
    color: var(--ink);
}
.btn-gold:hover { color: var(--ink); }

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

.btn-block { width: 100%; }
.btn-sm { padding: 7px 14px; font-size: 0.85rem; border-radius: 6px; }
.btn-danger { background: var(--red); border-color: #9c382f; color: #fff; }

/* ---------------------------------------------------------------- cards */

.card {
    background: var(--paper-raised);
    border: 1px solid var(--paper-line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 32px;
}

.page-head {
    margin-bottom: 32px;
}

.page-head .eyebrow {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.75rem;
    color: var(--gold-dark);
    font-weight: 700;
    margin-bottom: 6px;
    display: block;
}

/* ---------------------------------------------------------------- forms */

.form-group { margin-bottom: 20px; }

label {
    display: block;
    font-weight: 600;
    font-size: 0.88rem;
    margin-bottom: 6px;
    color: var(--ink-soft);
}

input[type=text], input[type=email], input[type=password], select, textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid var(--paper-line);
    border-radius: 8px;
    background: var(--paper);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--gold);
    background: var(--paper-raised);
}

.form-hint { font-size: 0.8rem; color: var(--muted); margin-top: 6px; }

.auth-card { margin-top: 24px; }

.auth-switch {
    text-align: center;
    margin-top: 18px;
    font-size: 0.9rem;
    color: var(--muted);
}

/* ---------------------------------------------------------------- alerts */

.alert {
    padding: 13px 18px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 20px;
    border: 1.5px solid transparent;
}
.alert-success { background: var(--green-bg); color: var(--green); border-color: #bfe3d5; }
.alert-error   { background: var(--red-bg);   color: var(--red);   border-color: #f0c9c5; }
.alert-info    { background: #EAF1FB; color: #2A5CA8; border-color: #cfdff5; }

/* ---------------------------------------------------------------- subject grid */

/* subject grid styles moved inline to dashboard.php for per-card theming */

/* ---------------------------------------------------------------- quiz */

.quiz-progress-bar {
    position: sticky;
    top: 0;
    background: var(--paper);
    padding: 14px 0;
    z-index: 10;
    border-bottom: 1px solid var(--paper-line);
}

.quiz-progress-track {
    height: 8px;
    background: var(--paper-line);
    border-radius: 999px;
    overflow: hidden;
}

.quiz-progress-fill {
    height: 100%;
    background: var(--gold);
    width: 0%;
    transition: width 0.2s ease;
}

.quiz-progress-meta {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    margin-bottom: 8px;
}

#quiz-timer { font-weight: 700; color: var(--ink); }
#quiz-timer.timer-warning { color: var(--red); }

.question-block {
    background: var(--paper-raised);
    border: 1px solid var(--paper-line);
    border-radius: var(--radius);
    padding: 26px 28px;
    margin-bottom: 22px;
}

.question-number {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--gold-dark);
    font-size: 0.85rem;
    margin-bottom: 8px;
    display: block;
}

.question-text {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 18px;
}

.option-list { display: flex; flex-direction: column; gap: 10px; }

.option-item {
    display: block;
    position: relative;
}

.option-item input[type=radio] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.option-item label {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: 1.5px solid var(--paper-line);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--ink);
    margin-bottom: 0;
    transition: border-color 0.12s ease, background 0.12s ease;
}

.option-item label:hover { border-color: var(--gold); }

.option-item input[type=radio]:checked + label {
    border-color: var(--gold-dark);
    background: #FCF3E1;
}

.option-letter {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1.5px solid var(--paper-line);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
    flex-shrink: 0;
    color: var(--muted);
}

.option-item input[type=radio]:checked + label .option-letter {
    background: var(--gold-dark);
    border-color: var(--gold-dark);
    color: #fff;
}

.quiz-submit-bar {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 8px;
}

/* ---------------------------------------------------------------- results */

.result-header {
    display: flex;
    align-items: center;
    gap: 36px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.score-stamp {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 4px solid var(--red);
    color: var(--red);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: rotate(-8deg);
    font-family: var(--font-display);
    flex-shrink: 0;
    position: relative;
}

.score-stamp.pass { border-color: var(--green); color: var(--green); }

.score-stamp .pct { font-size: 2.1rem; font-weight: 700; line-height: 1; }
.score-stamp .label { font-family: var(--font-mono); font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.08em; margin-top: 4px; }

.result-summary h2 { margin-bottom: 8px; }
.result-summary .meta { color: var(--muted); font-size: 0.92rem; }

.result-stats {
    display: flex;
    gap: 28px;
    margin-top: 16px;
}

.result-stat .num { font-family: var(--font-mono); font-size: 1.4rem; font-weight: 700; }
.result-stat .num.correct { color: var(--green); }
.result-stat .num.wrong { color: var(--red); }
.result-stat .lbl { font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }

.review-item {
    background: var(--paper-raised);
    border: 1px solid var(--paper-line);
    border-radius: var(--radius);
    padding: 22px 26px;
    margin-bottom: 16px;
}

.review-item .question-text { font-size: 1.02rem; margin-bottom: 14px; }

.review-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 14px;
    border-radius: 7px;
    font-size: 0.92rem;
    margin-bottom: 6px;
    border: 1.5px solid var(--paper-line);
}

.review-option.correct { background: var(--green-bg); border-color: #bfe3d5; color: var(--green); font-weight: 600; }
.review-option.incorrect { background: var(--red-bg); border-color: #f0c9c5; color: var(--red); font-weight: 600; }

.review-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 999px;
    font-weight: 700;
    margin-left: auto;
}
.review-tag.tag-correct { background: var(--green); color: #fff; }
.review-tag.tag-wrong { background: var(--red); color: #fff; }

/* ---------------------------------------------------------------- tables */

table.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--paper-raised);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--paper-line);
}

table.data-table th, table.data-table td {
    text-align: left;
    padding: 12px 16px;
    border-bottom: 1px solid var(--paper-line);
    font-size: 0.9rem;
}

table.data-table th {
    background: var(--paper);
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.05em;
    color: var(--muted);
}

table.data-table tr:last-child td { border-bottom: none; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.badge-easy { background: var(--green-bg); color: var(--green); }
.badge-medium { background: #FCF1DC; color: var(--gold-dark); }
.badge-hard { background: var(--red-bg); color: var(--red); }
.badge-admin { background: var(--ink); color: #fff; }
.badge-user { background: var(--paper-line); color: var(--ink-soft); }

/* ---------------------------------------------------------------- admin layout */

.admin-shell { display: flex; min-height: calc(100vh - 68px); }

.admin-sidebar {
    width: 230px;
    flex-shrink: 0;
    background: var(--ink);
    color: #E7EAF2;
    padding: 28px 18px;
}

.admin-sidebar a {
    display: block;
    color: #C7CEE3;
    text-decoration: none;
    padding: 10px 14px;
    border-radius: 7px;
    font-size: 0.92rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.admin-sidebar a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.admin-sidebar a.active { background: var(--gold); color: var(--ink); font-weight: 700; }

.admin-sidebar .sidebar-title {
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    color: #8089A8;
    margin: 22px 0 8px 14px;
}
.admin-sidebar .sidebar-title:first-child { margin-top: 0; }

.admin-main { flex: 1; padding: 36px 40px; max-width: 1100px; }

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 18px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--paper-raised);
    border: 1px solid var(--paper-line);
    border-radius: var(--radius);
    padding: 20px 22px;
}

.stat-card .num { font-family: var(--font-mono); font-size: 1.9rem; font-weight: 700; color: var(--ink); }
.stat-card .lbl { font-size: 0.82rem; color: var(--muted); margin-top: 2px; }

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-pills { display: flex; gap: 8px; flex-wrap: wrap; }

.filter-pills a {
    text-decoration: none;
    padding: 7px 14px;
    border-radius: 999px;
    border: 1.5px solid var(--paper-line);
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--ink-soft);
}

.filter-pills a.active { background: var(--ink); border-color: var(--ink); color: #fff; }

.action-row { display: flex; gap: 8px; }

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--muted);
}
.empty-state h3 { color: var(--ink); margin-bottom: 8px; }

.two-col { display: grid; grid-template-columns: 1.3fr 1fr; gap: 20px; }

.pagination { display: flex; gap: 6px; margin-top: 20px; justify-content: center; }
.pagination a, .pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 34px;
    height: 34px;
    padding: 0 8px;
    border-radius: 6px;
    border: 1.5px solid var(--paper-line);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ink-soft);
}
.pagination a:hover { border-color: var(--gold); }
.pagination span.current { background: var(--ink); border-color: var(--ink); color: #fff; }

@media (max-width: 800px) {
    .admin-shell { flex-direction: column; }
    .admin-sidebar { width: 100%; padding: 14px; display: flex; flex-wrap: wrap; gap: 4px; }
    .admin-sidebar .sidebar-title { display: none; }
    .admin-main { padding: 24px 18px; }
    .two-col { grid-template-columns: 1fr; }
    .result-header { flex-direction: column; text-align: center; }
}

@media (max-width: 600px) {
    .nav-links { gap: 12px; font-size: 0.85rem; }
    .site-header .container { flex-wrap: wrap; height: auto; padding: 12px 20px; }
    main { padding: 28px 0 48px; }
    .card { padding: 22px; }
}


/* ── WhatsApp required banner ────────────────────────────────────────────── */
.wa-required-banner {
    background: linear-gradient(90deg, #075e54 0%, #128c7e 100%);
    padding: 11px 0;
    color: #fff;
}
.wa-banner-inner {
    display: flex; align-items: center;
    justify-content: space-between; gap: 14px; flex-wrap: wrap;
}
.wa-banner-left {
    display: flex; align-items: center; gap: 12px;
}
.wa-banner-icon {
    width: 36px; height: 36px; background: rgba(255,255,255,.15);
    border-radius: 10px; display: flex; align-items: center;
    justify-content: center; flex-shrink: 0;
}
.wa-banner-left strong {
    display: block; font-size: .9rem; font-weight: 700;
}
.wa-banner-left span {
    font-size: .8rem; color: rgba(255,255,255,.75);
}
.wa-banner-btn {
    background: #25D366; color: #fff;
    padding: 8px 20px; border-radius: 8px;
    font-weight: 700; font-size: .85rem;
    text-decoration: none; white-space: nowrap;
    transition: opacity .15s;
}
.wa-banner-btn:hover { opacity: .88; }

/* ── Auth page shared ────────────────────────────────────────────────────── */
.form-hint  { font-size:.78rem; color:var(--muted); margin-top:4px; }
.form-group { margin-bottom:14px; }
.form-group label { display:block; margin-bottom:4px; font-weight:600; font-size:.88rem; }