/* ================================================================
   Student Spin Wheel – Enhanced Stylesheet
   Author: Himal Paudel  |  COS 506 – Advanced Programming
   ================================================================ */

/* ── Google Font ─────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ── Design Tokens (Light Theme) ────────────────────────────── */
:root {
    --bg:          #f0f4ff;
    --bg2:         #e8eefe;
    --card:        #ffffff;
    --card-alt:    #f8f9ff;
    --text:        #0f172a;
    --muted:       #64748b;
    --ring:        rgba(15, 23, 42, 0.13);
    --shadow:      0 8px 30px rgba(15, 23, 42, 0.10), 0 1px 4px rgba(15,23,42,0.06);
    --shadow-hover:0 16px 48px rgba(15, 23, 42, 0.15);
    --primary:     #4f46e5;
    --primary-bg:  rgba(79, 70, 229, 0.12);
    --primary-bd:  rgba(79, 70, 229, 0.30);
    --danger:      #ef4444;
    --danger-bg:   rgba(239, 68, 68, 0.13);
    --danger-bd:   rgba(239, 68, 68, 0.30);
    --success:     #22c55e;
    --header-bg:   rgba(255,255,255,0.85);
    --modal-bg:    rgba(0, 0, 0, 0.55);
    --badge-bg:    rgba(79, 70, 229, 0.10);
    --badge-text:  #3730a3;
    --kbd-bg:      rgba(15,23,42,0.08);
    --toggle-on:   #4f46e5;

    --radius-sm:   10px;
    --radius-md:   16px;
    --radius-lg:   22px;
    --radius-full: 9999px;

    --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Dark Theme Tokens ───────────────────────────────────────── */
[data-theme="dark"] {
    --bg:          #0a0f1e;
    --bg2:         #0d1526;
    --card:        #111827;
    --card-alt:    #1a2438;
    --text:        #f1f5f9;
    --muted:       #94a3b8;
    --ring:        rgba(241, 245, 249, 0.10);
    --shadow:      0 8px 30px rgba(0,0,0,0.45), 0 1px 4px rgba(0,0,0,0.3);
    --shadow-hover:0 16px 48px rgba(0,0,0,0.6);
    --primary:     #818cf8;
    --primary-bg:  rgba(129, 140, 248, 0.15);
    --primary-bd:  rgba(129, 140, 248, 0.35);
    --danger:      #f87171;
    --danger-bg:   rgba(248, 113, 113, 0.15);
    --danger-bd:   rgba(248, 113, 113, 0.35);
    --header-bg:   rgba(17, 24, 39, 0.90);
    --modal-bg:    rgba(0, 0, 0, 0.75);
    --badge-bg:    rgba(129, 140, 248, 0.15);
    --badge-text:  #a5b4fc;
    --kbd-bg:      rgba(241,245,249,0.10);
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    transition: background var(--transition), color var(--transition);
}

/* ── Header ──────────────────────────────────────────────────── */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--ring);
    box-shadow: 0 1px 8px rgba(0,0,0,0.06);
    transition: background var(--transition);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 20px;
    letter-spacing: -0.3px;
    color: var(--text);
}

.header-icon { font-size: 26px; }

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.kbd-hint {
    display: flex;
    align-items: center;
    gap: 5px;
}

kbd {
    display: inline-block;
    padding: 2px 7px;
    border-radius: 6px;
    border: 1px solid var(--ring);
    background: var(--kbd-bg);
    font-size: 11px;
    font-family: inherit;
    font-weight: 600;
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: 1px solid var(--ring);
    background: var(--card);
    cursor: pointer;
    font-size: 18px;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    box-shadow: 0 2px 8px rgba(0,0,0,0.07);
}
.icon-btn:hover { transform: translateY(-2px) scale(1.05); box-shadow: 0 6px 18px rgba(0,0,0,0.12); }
.icon-btn:active { transform: scale(0.96); }

/* ── Main Grid ───────────────────────────────────────────────── */
.app {
    max-width: 1160px;
    margin: 22px auto;
    padding: 0 14px 30px;
    display: grid;
    grid-template-columns: 1fr 1.25fr;
    gap: 16px;
}

@media (max-width: 1000px) {
    .app { grid-template-columns: 1fr; }
}

/* ── Card ────────────────────────────────────────────────────── */
.card {
    background: var(--card);
    border: 1px solid var(--ring);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: background var(--transition), box-shadow var(--transition);
}
.card:hover { box-shadow: var(--shadow-hover); }

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--ring);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}
.card-header h2 {
    margin: 0;
    font-size: 17px;
    font-weight: 800;
    letter-spacing: -0.2px;
}

.card-body { padding: 16px 20px 20px; }

.card-section {
    background: var(--card-alt);
    border: 1px solid var(--ring);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    transition: background var(--transition);
}

.section-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ── Pills ───────────────────────────────────────────────────── */
.pill {
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 700;
    background: var(--badge-bg);
    color: var(--badge-text);
    white-space: nowrap;
    transition: background var(--transition), color var(--transition);
}

/* ── Muted / Mini text ───────────────────────────────────────── */
.mini {
    font-size: 12.5px;
    color: var(--muted);
    line-height: 1.45;
    transition: color var(--transition);
}

/* ── Textarea ────────────────────────────────────────────────── */
textarea {
    width: 100%;
    min-height: 220px;
    resize: vertical;
    border-radius: var(--radius-md);
    border: 1px solid var(--ring);
    padding: 12px 14px;
    outline: none;
    font-size: 14px;
    line-height: 1.5;
    font-family: inherit;
    background: var(--card);
    color: var(--text);
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}
textarea:focus, input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,.15);
    outline: none;
}

/* ── Rows ────────────────────────────────────────────────────── */
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row-tight { gap: 6px; }

/* ── Buttons ─────────────────────────────────────────────────── */
button {
    border: 1px solid var(--ring);
    background: var(--card);
    padding: 9px 13px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 700;
    font-size: 13px;
    font-family: inherit;
    color: var(--text);
    transition: transform var(--transition), box-shadow var(--transition),
                background var(--transition), color var(--transition), border-color var(--transition);
}
button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0,0,0,0.12);
}
button:active { transform: translateY(0); box-shadow: none; }

button.primary {
    background: var(--primary-bg);
    border-color: var(--primary-bd);
    color: var(--primary);
}
button.primary:hover {
    background: var(--primary);
    color: #fff;
    border-color: transparent;
}

button.danger {
    background: var(--danger-bg);
    border-color: var(--danger-bd);
    color: var(--danger);
}
button.danger:hover {
    background: var(--danger);
    color: #fff;
    border-color: transparent;
}

button:disabled {
    opacity: 0.38;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Spin button extra glow */
.spin-btn { font-size: 15px; padding: 11px 18px; }
.spin-btn:not(:disabled):hover {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 0 0 4px rgba(79,70,229,0.25), 0 6px 20px rgba(79,70,229,0.35);
}

/* ── Inputs ──────────────────────────────────────────────────── */
input[type="number"],
input[type="text"] {
    border-radius: var(--radius-sm);
    border: 1px solid var(--ring);
    padding: 9px 12px;
    outline: none;
    font-size: 14px;
    font-family: inherit;
    background: var(--card);
    color: var(--text);
    width: 100%;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--primary);
}

/* ── Toggle (checkbox) ───────────────────────────────────────── */
.toggle {
    display: flex;
    gap: 10px;
    align-items: center;
    user-select: none;
    padding: 8px 12px;
    border: 1px solid var(--ring);
    border-radius: var(--radius-md);
    background: var(--card-alt);
    cursor: pointer;
    width: fit-content;
    font-size: 13px;
    font-weight: 600;
    transition: background var(--transition);
}
.toggle:hover { background: var(--primary-bg); }
.toggle input[type="checkbox"] {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* ── Wheel layout ────────────────────────────────────────────── */
.wheel-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 14px;
    align-items: start;
}
@media (max-width: 1000px) {
    .wheel-layout { grid-template-columns: 1fr; }
}

/* Wheel wrapper with pointer */
.wheel-wrap {
    position: relative;
    width: 100%;
}

canvas {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--ring);
    background: var(--card);
    display: block;
    transition: background var(--transition);
}

/* Pointer triangle at top */
.wheel-pointer {
    position: absolute;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 28px;
    color: #ef4444;
    z-index: 5;
    text-shadow: 0 2px 8px rgba(239,68,68,0.5);
    line-height: 1;
    pointer-events: none;
}

/* ── Countdown Overlay (New Feature #2) ──────────────────────── */
.countdown-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: rgba(0,0,0,0.45);
    z-index: 10;
    backdrop-filter: blur(2px);
}
#countdownNumber {
    font-size: 140px;
    font-weight: 900;
    color: #fff;
    line-height: 1;
    text-shadow: 0 0 40px rgba(79,70,229,0.8), 0 4px 24px rgba(0,0,0,0.5);
    animation: countPulse 0.9s ease-out forwards;
}
@keyframes countPulse {
    0%   { transform: scale(1.4); opacity: 0; }
    30%  { transform: scale(1.0); opacity: 1; }
    80%  { transform: scale(1.0); opacity: 1; }
    100% { transform: scale(0.7); opacity: 0; }
}

/* ── History / panel sections ────────────────────────────────── */
.history {
    background: var(--card-alt);
    border: 1px solid var(--ring);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    margin-bottom: 10px;
    transition: background var(--transition);
}
.history h3 {
    margin: 0 0 10px;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.1px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── Winner display ──────────────────────────────────────────── */
.winner {
    font-size: 28px;
    font-weight: 900;
    margin: 4px 0 6px;
    color: var(--text);
    letter-spacing: -0.5px;
    transition: color var(--transition);
}

/* ── History list ────────────────────────────────────────────── */
#historyList {
    margin: 0;
    padding-left: 18px;
    max-height: 160px;
    overflow-y: auto;
}
#historyList li {
    margin: 5px 0;
    font-size: 13px;
}

/* ── Groups output ───────────────────────────────────────────── */
.groups-output {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Courier New", monospace;
    white-space: pre-wrap;
    margin: 8px 0 0;
    padding: 10px;
    border: 1px dashed var(--ring);
    border-radius: var(--radius-md);
    background: var(--card);
    font-size: 12px;
    transition: background var(--transition);
}

/* ── Stats panel (New Feature #4) ────────────────────────────── */
.stats-panel {
    margin-top: 6px;
    max-height: 200px;
    overflow-y: auto;
}
.stats-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 5px 0;
    font-size: 12.5px;
}
.stats-name {
    flex: 1;
    font-weight: 600;
    color: var(--text);
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.stats-bar-wrap {
    width: 80px;
    height: 8px;
    background: var(--ring);
    border-radius: var(--radius-full);
    overflow: hidden;
    flex-shrink: 0;
}
.stats-bar {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width 400ms ease;
}
.stats-count {
    min-width: 22px;
    text-align: right;
    font-weight: 700;
    color: var(--badge-text);
}

/* ── Weights panel (New Feature #5) ─────────────────────────── */
.weights-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 160px;
    overflow-y: auto;
}
.weight-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12.5px;
}
.weight-name {
    flex: 1;
    font-weight: 600;
    color: var(--text);
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.weight-input {
    width: 60px !important;
    padding: 4px 6px !important;
    text-align: center;
    font-size: 12px !important;
}

/* ── Spin status pill colors ─────────────────────────────────── */
#spinStatusPill.spinning {
    background: rgba(239,68,68,0.15) !important;
    color: #ef4444 !important;
}
#spinStatusPill.ready {
    background: rgba(34,197,94,0.15) !important;
    color: #16a34a !important;
}

/* ── Modal – Winner Spotlight (New Feature #3) ───────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: var(--modal-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 300ms ease;
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-box {
    position: relative;
    background: var(--card);
    border: 1px solid var(--ring);
    border-radius: 28px;
    padding: 44px 48px 36px;
    max-width: 440px;
    width: 90%;
    text-align: center;
    box-shadow: 0 32px 80px rgba(0,0,0,0.35);
    animation: modalPop 350ms cubic-bezier(0.34, 1.56, 0.64, 1) both;
    overflow: hidden;
}
@keyframes modalPop {
    from { transform: scale(0.7) translateY(30px); opacity: 0; }
    to   { transform: scale(1) translateY(0);      opacity: 1; }
}

.modal-confetti {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 6px;
    background: linear-gradient(90deg,
        #4f46e5, #818cf8, #34d399, #f59e0b, #ef4444, #ec4899, #4f46e5);
    background-size: 200% 100%;
    animation: confettiSlide 2s linear infinite;
}
@keyframes confettiSlide {
    from { background-position: 0 0; }
    to   { background-position: 200% 0; }
}

.modal-trophy { font-size: 60px; margin-bottom: 8px; animation: trophyBounce 0.5s 0.3s ease both; }
@keyframes trophyBounce {
    from { transform: scale(0) rotate(-20deg); }
    to   { transform: scale(1) rotate(0deg); }
}

.modal-label {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 6px;
}

.modal-name {
    font-size: 38px;
    font-weight: 900;
    color: var(--text);
    margin: 0 0 6px;
    letter-spacing: -1px;
    line-height: 1.1;
}

.modal-sub {
    font-size: 14px;
    color: var(--muted);
    margin: 0 0 22px;
}

.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}