/* ═══════════════════════════════════════════════════════════════════════════
   🔍  NOIR THEME  —  Crime files. Cold coffee. No magic here.
   ═══════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Special+Elite&family=Source+Sans+3:wght@400;600;700&display=swap');

:root {
    --n-black:      #080c10;
    --n-dark:       #0d1117;
    --n-surface:    #161b22;
    --n-raised:     #1c2128;
    --n-border:     #30363d;
    --n-border-dim: #21262d;
    --n-text:       #cdd9e5;
    --n-muted:      #768390;
    --n-dim:        #545d68;
    --n-blue:       #539bf5;
    --n-blue-dark:  #2e6cd1;
    --n-amber:      #c69026;
    --n-red:        #e5534b;
    --n-green:      #57ab5a;
    --n-paper:      #1a1209;
    --n-paper-line: rgba(255,255,255,0.04);
    --n-ink:        #d4c9b0;
    --n-ink-dim:    #8a7d68;
    --theme-accent: #539bf5; /* compat */
}

/* ─── Spacing & typography ───────────────────────────────────────────────── */
body            { font-family: 'Source Sans 3', sans-serif; }
h1              { font-size: 1.5em; font-weight: 700; }
header          { padding: 20px 36px; }
.sidebar-item   { padding: 12px 16px; font-size: 0.88em; line-height: 1.4; }
.points-display { padding: 10px 18px; text-align: center; }
.points-label   { font-size: 0.65em; font-weight: 700; margin-bottom: 3px; }
.points-value   { font-size: 1.8em; font-weight: 700; }
.user-name      { font-size: 0.78em; font-weight: 600; }
.logout-button  { font-size: 0.72em; padding: 4px 10px; }

.progress-section       { padding: 14px 36px; }
.progress-label         { margin-bottom: 6px; font-size: 0.72em; font-weight: 700; }
.progress-bar-container { margin-bottom: 5px; }
.progress-text          { font-size: 0.72em; font-weight: 600; }

.task-section           { padding: 26px 36px; }
.chapter-description    { padding: 16px 20px; margin-bottom: 22px; font-size: 0.96em; line-height: 1.9; }
.task-container         { gap: 16px; }
.task-card              { padding: 22px 26px; }
.task-header            { margin-bottom: 14px; padding-bottom: 12px; }
.task-title             { font-size: 0.85em; font-weight: 700; }
.task-points            { padding: 3px 10px; font-size: 0.75em; font-weight: 700; }
.task-question          { font-size: 1.05em; margin: 16px 0; line-height: 1.85; font-weight: 400; }
.task-input-group       { gap: 10px; margin: 16px 0 10px; padding-top: 14px; }
.task-input             { font-size: 1.05em; padding: 9px 12px; width: 130px; font-weight: 600; }
.task-button            { padding: 9px 24px; font-size: 0.82em; font-weight: 700; }
.task-status            { margin-top: 10px; font-size: 0.9em; font-weight: 700; }
.confetti               { width: 5px; height: 5px; }
.message                { padding: 11px 20px; font-size: 0.92em; font-weight: 700; }

.auth-card              { padding: 32px; }
.auth-title             { font-size: 1.4em; font-weight: 700; margin-bottom: 20px; padding-bottom: 14px; }
.auth-tabs              { margin-bottom: 18px; }
.auth-tab               { padding: 7px 14px; font-size: 0.75em; font-weight: 700; }
.auth-input             { padding: 9px 12px; margin-bottom: 8px; font-size: 0.88em; }
.auth-error             { font-size: 0.82em; margin-bottom: 8px; }
.auth-button            { padding: 10px; font-size: 0.82em; font-weight: 700; }
.reset-button           { padding: 7px 12px; font-size: 0.75em; font-weight: 600; }

.class-picker-card      { padding: 32px; }
.class-picker-title     { font-size: 1.3em; font-weight: 700; margin-bottom: 6px; }
.class-picker-subtitle  { font-size: 0.85em; margin-bottom: 22px; }
.class-list             { gap: 8px; }
.class-card             { padding: 14px 18px; gap: 14px; }
.class-card-icon        { font-size: 1.8em; }
.class-card-name        { font-size: 1em; font-weight: 700; margin-bottom: 2px; }
.class-card-desc        { font-size: 0.8em; }
.completion-icon        { font-size: 2.6em; margin-bottom: 12px; }

/* ─── Full-page background ───────────────────────────────────────────────── */
body { background: var(--n-black); }

/* ─── Sidebar ────────────────────────────────────────────────────────────── */
.sidebar {
    background: var(--n-dark);
    border-right: 1px solid var(--n-border);
    box-shadow: 2px 0 16px rgba(0,0,0,0.8);
}

.sidebar::-webkit-scrollbar { width: 2px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--n-border); }

.sidebar-header {
    background: var(--n-surface);
    border-bottom: 1px solid var(--n-border);
    padding: 20px 18px;
}

.sidebar-header h2 {
    font-family: 'Special Elite', monospace;
    color: var(--n-muted);
    font-size: 0.72em;
    font-weight: 400;
    letter-spacing: 3px;
    text-transform: uppercase;
}

.sidebar-item {
    margin: 0;
    border-radius: 0;
    color: var(--n-muted);
    font-weight: 400;
    border-bottom: 1px solid var(--n-border-dim);
    border-left: 2px solid transparent;
    transition: background 0.12s, color 0.12s, border-left-color 0.12s;
}

.sidebar-item:hover {
    background: var(--n-surface);
    color: var(--n-text);
    border-left-color: var(--n-dim);
    transform: none;
}

.sidebar-item.active {
    background: var(--n-raised);
    border-left: 2px solid var(--n-blue);
    color: var(--n-text);
    font-weight: 700;
    box-shadow: inset 3px 0 12px rgba(83,155,245,0.08);
}

.sidebar-item.completed {
    border-left: 2px solid var(--n-green);
    color: var(--n-green);
    background: rgba(87,171,90,0.05);
}

.sidebar-item.completed.active {
    background: var(--n-raised);
    border-left: 2px solid var(--n-blue);
    color: var(--n-text);
}

/* ─── Main content — aged dark paper ────────────────────────────────────── */
.main-content, .container {
    background: var(--n-paper);
    background-image: repeating-linear-gradient(
        transparent, transparent 27px,
        var(--n-paper-line) 27px, var(--n-paper-line) 28px
    );
}

/* ─── Header ─────────────────────────────────────────────────────────────── */
header {
    background: var(--n-dark);
    border-bottom: 2px solid var(--n-blue);
}

h1 {
    font-family: 'Special Elite', monospace;
    font-weight: 400;
    color: var(--n-text);
    letter-spacing: 3px;
    text-transform: uppercase;
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
    animation: none;
}

/* ─── Points ─────────────────────────────────────────────────────────────── */
.points-display {
    background: var(--n-surface);
    border: 1px solid var(--n-border);
    border-radius: 0;
    box-shadow: none;
}

.points-label { color: var(--n-dim); text-transform: uppercase; letter-spacing: 2.5px; }
.points-value { color: var(--n-blue); font-family: 'Special Elite', monospace; }

/* ─── User area ──────────────────────────────────────────────────────────── */
.user-name { color: var(--n-muted); text-transform: uppercase; letter-spacing: 1px; }

.logout-button {
    background: none;
    border: 1px solid var(--n-border);
    color: var(--n-muted);
    border-radius: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: border-color 0.2s, color 0.2s;
}

.logout-button:hover { border-color: var(--n-red); color: var(--n-red); background: none; }

/* ─── Progress ───────────────────────────────────────────────────────────── */
.progress-section {
    background: rgba(0,0,0,0.4);
    border-bottom: 1px solid var(--n-border-dim);
}

.progress-label { color: var(--n-dim); text-transform: uppercase; letter-spacing: 2px; }

.progress-bar-container {
    height: 6px;
    background: rgba(255,255,255,0.06);
    border-radius: 0;
    border: none;
}

.progress-bar { background: var(--n-blue); border-radius: 0; animation: none; box-shadow: none; }
.progress-text { color: var(--n-dim); }

/* ─── Chapter description ────────────────────────────────────────────────── */
.chapter-description {
    background: rgba(0,0,0,0.25);
    border: 1px solid var(--n-border-dim);
    border-left: 3px solid var(--n-blue);
    border-radius: 0;
    color: var(--n-ink);
    font-family: 'Special Elite', monospace;
}

/* ─── Task cards — case files ────────────────────────────────────────────── */
.task-card {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--n-border-dim);
    border-top: 2px solid var(--n-border);
    border-radius: 0;
    box-shadow: 0 2px 12px rgba(0,0,0,0.4);
    transition: box-shadow 0.2s, border-top-color 0.2s;
}

.task-card::before { display: none; }

.task-card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    border-top-color: var(--n-blue);
    transform: none;
}

.task-header { border-bottom: 1px solid var(--n-border-dim); }

.task-title {
    font-family: 'Special Elite', monospace;
    color: var(--n-text);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.task-points {
    background: var(--n-surface);
    color: var(--n-muted);
    border: 1px solid var(--n-border);
    border-radius: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.task-question { color: var(--n-ink); }

.task-input-group { border-top: 1px solid var(--n-border-dim); }

.task-input {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--n-border);
    border-radius: 0;
    color: var(--n-text);
    font-family: 'Special Elite', monospace;
    transition: border-color 0.2s;
}

.task-input:focus {
    outline: none;
    border-color: var(--n-blue);
    box-shadow: 0 0 0 3px rgba(83,155,245,0.1);
}

.task-button {
    background: var(--n-blue);
    color: #fff;
    border-radius: 0;
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow: none;
    transition: background 0.15s;
}

.task-button:hover  { background: var(--n-blue-dark); transform: none; box-shadow: none; opacity: 1; }
.task-button:active { background: #1f4fa5; }
.task-button:disabled { background: var(--n-surface); color: var(--n-dim); }

.task-status.success   { color: var(--n-green); }
.task-status.error     { color: var(--n-red); }
.task-status.completed { color: var(--n-amber); }

/* ─── Confetti (square, minimal) ─────────────────────────────────────────── */
.confetti { border-radius: 0; background: var(--n-blue); }

/* ─── Toast ──────────────────────────────────────────────────────────────── */
.message {
    border-radius: 0;
    border: 1px solid;
    box-shadow: 0 4px 20px rgba(0,0,0,0.6);
    font-family: 'Source Sans 3', sans-serif;
}

.message.success { background: #0d1f12; color: var(--n-green); border-color: var(--n-green); }
.message.error   { background: #1f0d0d; color: #f07070;        border-color: var(--n-red); }

/* ─── Overlays — CRT scanline texture ───────────────────────────────────── */
.auth-overlay,
.class-picker-overlay {
    background:
        repeating-linear-gradient(
            0deg,
            transparent, transparent 2px,
            rgba(255,255,255,0.012) 2px, rgba(255,255,255,0.012) 4px
        ),
        var(--n-black);
}

.auth-card,
.class-picker-card {
    background: var(--n-dark);
    border: 1px solid var(--n-border);
    border-radius: 0;
    box-shadow: 0 0 0 1px rgba(255,255,255,0.03), 0 20px 60px rgba(0,0,0,0.8);
    backdrop-filter: none;
}

.auth-title {
    font-family: 'Special Elite', monospace;
    color: var(--n-text);
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--n-border);
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
    animation: none;
}

.class-picker-title {
    font-family: 'Special Elite', monospace;
    color: var(--n-text);
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.class-picker-subtitle { color: var(--n-muted); }

.auth-tabs { border-bottom: 1px solid var(--n-border); }

.auth-tab {
    color: var(--n-dim);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    transition: color 0.2s, border-color 0.2s;
}

.auth-tab.active { color: var(--n-text); border-bottom-color: var(--n-blue); }

.auth-input {
    background: var(--n-surface);
    border: 1px solid var(--n-border);
    border-radius: 0;
    color: var(--n-text);
    transition: border-color 0.2s;
}

.auth-input:focus { outline: none; border-color: var(--n-blue); }
.auth-input::placeholder { color: var(--n-dim); }
.auth-error { color: #f07070; }

.auth-button {
    background: var(--n-blue);
    color: #fff;
    border-radius: 0;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: background 0.2s;
    box-shadow: none;
}

.auth-button:hover { background: var(--n-blue-dark); opacity: 1; transform: none; }

.reset-button {
    border: 1px solid rgba(229,83,75,0.35);
    color: var(--n-red);
    border-radius: 0;
    transition: background 0.2s;
}

.reset-button:hover { background: rgba(229,83,75,0.08); }

/* ─── Class cards in picker ──────────────────────────────────────────────── */
.class-card {
    background: var(--n-surface);
    border: 1px solid var(--n-border);
    border-left: 2px solid var(--n-blue);
    border-radius: 0;
    transition: background 0.15s;
}

.class-card:hover { background: var(--n-raised); transform: none; box-shadow: none; opacity: 1; }

.class-card-name {
    font-family: 'Special Elite', monospace;
    font-weight: 400;
    letter-spacing: 1px;
}

.completion-icon { animation: none; }