/* ═══════════════════════════════════════════════════════════════════════════
   🦄  UNICORN THEME  —  Maximum magic. No apologies.
   ═══════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&display=swap');

:root {
    --u-bg:          #1a0840;
    --u-sidebar:     #120630;
    --u-purple:      #6d28d9;
    --u-pink:        #ff69b4;
    --u-pink-dark:   #db2777;
    --u-pink-glow:   rgba(255, 105, 180, 0.35);
    --u-content:     #fdf4ff;
    --u-card:        #ffffff;
    --u-text-dark:   #3b0764;
    --u-text-mid:    #7e22ce;
    --u-text-pale:   #fce4ff;
    --u-muted:       #c4a0dc;
    --u-green:       #34d399;
    --u-red:         #f87171;
    --theme-accent:  #ff69b4; /* compat */

    --rainbow: linear-gradient(90deg,
        #ff6ec7 0%, #c084fc 20%, #60a5fa 40%, #34d399 60%, #fbbf24 80%, #ff6ec7 100%);
}

/* ─── Spacing & typography ───────────────────────────────────────────────── */
body            { font-family: 'Nunito', sans-serif; }
h1              { font-size: 2em; font-weight: 900; }
header          { padding: 24px 44px; }
.sidebar-item   { padding: 12px 16px; font-size: 0.93em; line-height: 1.4; }
.points-display { padding: 14px 26px; text-align: center; }
.points-label   { font-size: 0.72em; font-weight: 700; margin-bottom: 4px; }
.points-value   { font-size: 2.2em; font-weight: 900; }
.user-name      { font-size: 0.85em; font-weight: 600; }
.logout-button  { font-size: 0.8em; padding: 5px 14px; }

.progress-section       { padding: 20px 44px; }
.progress-label         { margin-bottom: 10px; font-size: 0.8em; font-weight: 700; }
.progress-bar-container { margin-bottom: 6px; }
.progress-text          { font-size: 0.8em; font-weight: 700; }

.task-section           { padding: 36px 44px; }
.chapter-description    { padding: 20px 26px; margin-bottom: 32px; font-size: 1.05em; line-height: 1.8; }
.task-container         { gap: 28px; }
.task-card              { padding: 32px; }
.task-header            { margin-bottom: 20px; padding-bottom: 16px; }
.task-title             { font-size: 1.05em; font-weight: 800; }
.task-points            { padding: 5px 16px; font-size: 0.82em; font-weight: 800; }
.task-question          { font-size: 1.15em; margin: 22px 0; line-height: 1.8; font-weight: 600; }
.task-input-group       { gap: 14px; margin: 24px 0 14px; padding-top: 20px; }
.task-input             { font-size: 1.2em; padding: 12px 18px; width: 160px; font-weight: 700; }
.task-button            { padding: 12px 32px; font-size: 1em; font-weight: 800; }
.task-status            { margin-top: 16px; font-size: 1em; font-weight: 700; }
.confetti               { width: 10px; height: 10px; }
.message                { padding: 14px 24px; font-size: 1em; font-weight: 700; }

.auth-card              { padding: 40px; }
.auth-title             { font-size: 1.7em; font-weight: 900; margin-bottom: 24px; }
.auth-tabs              { margin-bottom: 24px; }
.auth-tab               { padding: 8px 20px; font-size: 0.9em; font-weight: 700; }
.auth-input             { padding: 12px 16px; margin-bottom: 12px; font-size: 1em; }
.auth-error             { font-size: 0.85em; margin-bottom: 10px; }
.auth-button            { padding: 14px; font-size: 1em; font-weight: 900; }
.reset-button           { padding: 10px 12px; font-size: 0.8em; font-weight: 600; }

.class-picker-card      { padding: 44px; }
.class-picker-title     { font-size: 1.6em; font-weight: 900; margin-bottom: 10px; }
.class-picker-subtitle  { font-size: 0.92em; margin-bottom: 32px; }
.class-list             { gap: 16px; }
.class-card             { padding: 20px 24px; gap: 18px; }
.class-card-icon        { font-size: 2.6em; }
.class-card-name        { font-size: 1.15em; font-weight: 800; margin-bottom: 5px; }
.class-card-desc        { font-size: 0.87em; }
.completion-icon        { font-size: 3.6em; margin-bottom: 18px; }

/* ─── Full-page background with stars ───────────────────────────────────── */
body {
    background: var(--u-bg);
    background-image:
        radial-gradient(1px 1px at 15% 25%, rgba(255,255,255,0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 72%  8%, rgba(255,255,255,0.5) 0%, transparent 100%),
        radial-gradient(1px 1px at 44% 60%, rgba(255,255,255,0.4) 0%, transparent 100%),
        radial-gradient(1px 1px at 88% 45%, rgba(255,255,255,0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at  5% 80%, rgba(255,255,255,0.3) 0%, transparent 100%),
        radial-gradient(2px 2px at 30% 70%, rgba(255,105,180,0.5) 0%, transparent 100%),
        radial-gradient(2px 2px at 60% 30%, rgba(192,132,252,0.5) 0%, transparent 100%);
}

/* ─── Sidebar ────────────────────────────────────────────────────────────── */
.sidebar {
    background: var(--u-sidebar);
    border-right: 1px solid rgba(255, 105, 180, 0.15);
    box-shadow: 4px 0 30px rgba(0, 0, 0, 0.6);
}

.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--u-pink); border-radius: 99px; }

.sidebar-header {
    padding: 28px 20px 22px;
    border-bottom: 1px solid rgba(255, 105, 180, 0.15);
    background: linear-gradient(180deg, rgba(255,105,180,0.08) 0%, transparent 100%);
}

.sidebar-header h2 {
    color: var(--u-muted);
    font-size: 0.75em;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.sidebar-item {
    border-radius: 10px;
    margin: 3px 10px;
    color: var(--u-muted);
    font-weight: 600;
    transition: background 0.18s, color 0.15s, transform 0.15s;
}

.sidebar-item:hover {
    background: rgba(255, 105, 180, 0.12);
    color: var(--u-text-pale);
    transform: translateX(4px);
}

.sidebar-item.active {
    background: linear-gradient(135deg, var(--u-pink), var(--u-purple));
    color: #fff;
    font-weight: 900;
    box-shadow: 0 4px 20px var(--u-pink-glow);
}

.sidebar-item.completed {
    background: rgba(52, 211, 153, 0.1);
    color: #6ee7b7;
}

.sidebar-item.completed.active {
    background: linear-gradient(135deg, var(--u-pink), var(--u-purple));
    color: #fff;
}

/* ─── Main content ───────────────────────────────────────────────────────── */
.main-content, .container { background: var(--u-content); }

/* ─── Header ─────────────────────────────────────────────────────────────── */
header {
    background: var(--u-bg);
    border-bottom: 4px solid transparent;
    border-image: var(--rainbow) 1;
}

h1 {
    font-weight: 900;
    background: var(--rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 300% 100%;
    animation: rainbowSlide 5s linear infinite;
}

@keyframes rainbowSlide {
    0%   { background-position: 0% 50%; }
    100% { background-position: 300% 50%; }
}

/* ─── Points ─────────────────────────────────────────────────────────────── */
.points-display {
    background: rgba(255, 105, 180, 0.1);
    border: 2px solid var(--u-pink);
    border-radius: 16px;
    box-shadow: 0 0 20px var(--u-pink-glow);
}

.points-label { color: var(--u-muted); text-transform: uppercase; letter-spacing: 1.5px; }
.points-value { color: var(--u-pink); }

/* ─── User area ──────────────────────────────────────────────────────────── */
.user-name { color: var(--u-muted); }

.logout-button {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.12);
    color: var(--u-muted);
    border-radius: 8px;
    transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.logout-button:hover {
    border-color: var(--u-pink);
    color: var(--u-pink);
    background: rgba(255, 105, 180, 0.1);
}

/* ─── Progress ───────────────────────────────────────────────────────────── */
.progress-section {
    background: rgba(109, 40, 217, 0.05);
    border-bottom: 1px solid rgba(255, 105, 180, 0.1);
}

.progress-label { color: var(--u-text-mid); letter-spacing: 1px; text-transform: uppercase; }

.progress-bar-container {
    height: 18px;
    background: rgba(109, 40, 217, 0.12);
    border-radius: 99px;
    border: 1px solid rgba(109, 40, 217, 0.2);
}

.progress-bar {
    background: var(--rainbow);
    background-size: 300% 100%;
    border-radius: 99px;
    animation: rainbowSlide 3s linear infinite;
    box-shadow: 0 0 10px rgba(255, 105, 180, 0.5);
}

.progress-text { color: var(--u-text-mid); }

/* ─── Chapter description ────────────────────────────────────────────────── */
.chapter-description {
    background: linear-gradient(135deg, rgba(109,40,217,0.06), rgba(255,105,180,0.06));
    border: 1px solid rgba(255, 105, 180, 0.2);
    border-left: 5px solid var(--u-pink);
    border-radius: 16px;
    color: var(--u-text-dark);
}

/* ─── Task cards ─────────────────────────────────────────────────────────── */
.task-card {
    background: var(--u-card);
    border: 2px solid rgba(192, 132, 252, 0.15);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(255, 105, 180, 0.1);
    transition: border-color 0.2s, box-shadow 0.25s, transform 0.2s;
}

.task-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: var(--rainbow);
    background-size: 300% 100%;
    border-radius: 20px 20px 0 0;
    animation: rainbowSlide 5s linear infinite;
}

.task-card:hover {
    border-color: rgba(255, 105, 180, 0.5);
    box-shadow: 0 12px 40px rgba(255, 105, 180, 0.22);
    transform: translateY(-4px);
}

.task-header { border-bottom: 1px solid rgba(192, 132, 252, 0.15); }

.task-title   { color: var(--u-text-dark); font-weight: 800; }
.task-question { color: var(--u-text-dark); }

.task-points {
    background: rgba(255, 105, 180, 0.1);
    color: var(--u-pink-dark);
    border: 1px solid rgba(255, 105, 180, 0.25);
    border-radius: 99px;
}

.task-input-group { border-top: 1px solid rgba(192, 132, 252, 0.12); }

.task-input {
    border: 2px solid rgba(109, 40, 217, 0.2);
    border-radius: 12px;
    background: #fff;
    color: var(--u-text-dark);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.task-input:focus {
    outline: none;
    border-color: var(--u-pink);
    box-shadow: 0 0 0 4px rgba(255, 105, 180, 0.15);
}

.task-button {
    background: linear-gradient(135deg, var(--u-pink), var(--u-purple));
    color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--u-pink-glow);
    transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
}

.task-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(255, 105, 180, 0.55);
    opacity: 0.92;
}

.task-button:active  { transform: translateY(0); }
.task-button:disabled { background: #d4bde8; box-shadow: none; opacity: 0.6; }

.task-status.success   { color: #15803d; }
.task-status.error     { color: #dc2626; }
.task-status.completed { color: var(--u-pink-dark); }

/* ─── Confetti ───────────────────────────────────────────────────────────── */
.confetti { border-radius: 50%; background: var(--u-pink); }

/* ─── Toast ──────────────────────────────────────────────────────────────── */
.message { border-radius: 16px; box-shadow: 0 8px 32px rgba(0,0,0,0.2); font-family: 'Nunito', sans-serif; }
.message.success { background: linear-gradient(135deg, #15803d, #166534); color: #fff; }
.message.error   { background: linear-gradient(135deg, #dc2626, #991b1b); color: #fff; }

/* ─── Overlays ───────────────────────────────────────────────────────────── */
.auth-overlay,
.class-picker-overlay {
    background:
        radial-gradient(ellipse at 30% 60%, rgba(109,40,217,0.5) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(255,105,180,0.4) 0%, transparent 45%),
        radial-gradient(ellipse at 60% 80%, rgba(96,165,250,0.3) 0%, transparent 40%),
        #0d0520;
}

.auth-card,
.class-picker-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,105,180,0.3);
    border-radius: 28px;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow:
        0 30px 80px rgba(0,0,0,0.5),
        0 0 0 1px rgba(255,255,255,0.06),
        inset 0 1px 0 rgba(255,255,255,0.12);
}

.auth-title {
    background: var(--rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 300% 100%;
    animation: rainbowSlide 5s linear infinite;
}

.class-picker-title { color: #fff; }
.class-picker-subtitle { color: rgba(255,255,255,0.4); }

.auth-tabs { border-bottom: 1px solid rgba(255,255,255,0.1); }

.auth-tab {
    color: rgba(255,255,255,0.35);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: color 0.2s, border-color 0.2s;
}

.auth-tab.active { color: #fff; border-bottom-color: var(--u-pink); }

.auth-input {
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 12px;
    color: #fff;
    transition: border-color 0.2s, background 0.2s;
}

.auth-input:focus { outline: none; border-color: var(--u-pink); background: rgba(255,255,255,0.11); }
.auth-input::placeholder { color: rgba(255,255,255,0.28); }
.auth-error { color: var(--u-red); }

.auth-button {
    background: linear-gradient(135deg, var(--u-pink), var(--u-purple));
    color: #fff;
    border-radius: 14px;
    box-shadow: 0 6px 24px var(--u-pink-glow);
    transition: opacity 0.2s, transform 0.15s;
}

.auth-button:hover { opacity: 0.88; transform: translateY(-1px); }

.reset-button {
    border: 1px solid rgba(220,38,38,0.35);
    color: #f87171;
    border-radius: 10px;
    transition: background 0.2s;
}

.reset-button:hover { background: rgba(220,38,38,0.1); }

/* ─── Class cards in picker ──────────────────────────────────────────────── */
.class-card {
    border: 2px solid rgba(255,105,180,0.3);
    border-radius: 16px;
    background: rgba(255,255,255,0.04);
    transition: transform 0.18s, box-shadow 0.18s;
}

.class-card:hover { transform: translateY(-4px); box-shadow: 0 14px 40px rgba(0,0,0,0.35); }
.class-card-name { font-weight: 900; }

/* ─── Completion bounce ──────────────────────────────────────────────────── */
.completion-icon { animation: bounce 1.2s ease infinite; }

@keyframes bounce {
    0%, 100% { transform: translateY(0) scale(1); }
    50%       { transform: translateY(-14px) scale(1.08); }
}