*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

:root {
    --primary: #8B5CF6;
    --accent: #C4B5FD;
    --bg: #0D0D1A;
    --surface: #16162A;
    --surface2: #1E1E3A;
    --border: #2D2D50;
    --text: #E2E8F0;
    --text-dim: #94A3B8;
    --success: #10B981;
    --warn: #F59E0B;
    --danger: #EF4444;
    --font: 'Inter', system-ui, sans-serif;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    padding: .85rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(135deg, #08080f 0%, var(--surface) 100%);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .75rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: .6rem;
}

.logo-icon {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.logo h1 {
    font-size: 1rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo p {
    font-size: .63rem;
    color: var(--text-dim);
}

.header-actions {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap;
}

.btn {
    padding: .38rem .8rem;
    border-radius: 6px;
    border: none;
    font-family: var(--font);
    font-size: .72rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .18s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: #7c3aed;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--surface2);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: #2a2a50;
}

/* Setup screen */
.setup-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.setup-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    max-width: 560px;
    width: 100%;
    animation: popIn .4s ease;
}

@keyframes popIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(.97);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.setup-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: .4rem;
}

.setup-sub {
    font-size: .8rem;
    color: var(--text-dim);
    margin-bottom: 1.5rem;
}

.setup-group {
    margin-bottom: 1rem;
}

.setup-label {
    font-size: .72rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: .4rem;
    display: block;
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
}

.chip {
    padding: .3rem .65rem;
    border-radius: 20px;
    font-size: .72rem;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid var(--border);
    background: var(--surface2);
    color: var(--text-dim);
    transition: all .15s;
}

.chip.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.chip:hover:not(.active) {
    border-color: var(--primary);
    color: var(--accent);
}

.timer-row {
    display: flex;
    align-items: center;
    gap: .5rem;
}

.timer-input {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text);
    font-family: var(--font);
    font-size: .8rem;
    padding: .32rem .5rem;
    outline: none;
    width: 60px;
    text-align: center;
}

/* Session screen */
.session-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.session-top {
    padding: .6rem 1.25rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.progress-info {
    font-size: .78rem;
    color: var(--text-dim);
}

.progress-bar-wrap {
    flex: 1;
    height: 5px;
    background: var(--surface2);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 3px;
    transition: width .4s ease;
}

.timer-display {
    font-size: .9rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--accent);
    min-width: 42px;
    text-align: right;
}

.timer-display.warn {
    color: var(--warn);
}

.timer-display.danger {
    color: var(--danger);
    animation: shake .4s ease;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0)
    }

    25% {
        transform: translateX(-4px)
    }

    75% {
        transform: translateX(4px)
    }
}

/* Question card */
.session-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.question-card {
    max-width: 680px;
    width: 100%;
    animation: fadeUp .35s ease;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.q-meta {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap;
    margin-bottom: .75rem;
}

.q-badge {
    font-size: .62rem;
    font-weight: 700;
    padding: .12rem .4rem;
    border-radius: 3px;
    background: rgba(139, 92, 246, .15);
    color: var(--accent);
    border: 1px solid rgba(139, 92, 246, .3);
}

.q-text {
    font-size: 1.08rem;
    font-weight: 600;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.answer-textarea {
    width: 100%;
    min-height: 130px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--font);
    font-size: .82rem;
    padding: .75rem;
    resize: vertical;
    outline: none;
    transition: border-color .2s;
    line-height: 1.6;
}

.answer-textarea:focus {
    border-color: var(--primary);
}

.q-actions {
    display: flex;
    gap: .5rem;
    margin-top: .75rem;
    flex-wrap: wrap;
}

.bookmark-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: .4rem .6rem;
    font-size: .85rem;
    cursor: pointer;
    color: var(--text-dim);
    transition: all .15s;
}

.bookmark-btn.bookmarked {
    color: var(--warn);
    border-color: var(--warn);
    background: rgba(245, 158, 11, .1);
}

/* Feedback card */
.feedback-card {
    margin-top: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    animation: fadeUp .3s ease;
}

.fb-score-row {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: .75rem;
}

.fb-meter {
    flex: 1;
    height: 8px;
    background: var(--surface2);
    border-radius: 4px;
    overflow: hidden;
}

.fb-fill {
    height: 100%;
    border-radius: 4px;
    transition: width .5s ease;
}

.fb-pct {
    font-size: .78rem;
    font-weight: 700;
}

.fb-section {
    margin-bottom: .5rem;
    font-size: .78rem;
    line-height: 1.6;
}

.fb-section strong {
    color: var(--accent);
}

.keyword-hit {
    background: rgba(16, 185, 129, .15);
    color: #10B981;
    border-radius: 3px;
    padding: .05rem .3rem;
    margin: 0 .15rem;
    font-size: .73rem;
}

.keyword-miss {
    background: rgba(239, 68, 68, .1);
    color: #EF4444;
    border-radius: 3px;
    padding: .05rem .3rem;
    margin: 0 .15rem;
    font-size: .73rem;
    text-decoration: line-through;
}

/* Summary screen */
.summary-screen {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.summary-card {
    max-width: 500px;
    width: 100%;
}

.summary-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: .4rem;
}

.summary-score {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
    margin: 1rem 0;
}

.summary-stats {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: .75rem;
    margin-bottom: 1.5rem;
}

.stat-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .75rem;
    text-align: center;
}

.stat-box-val {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-box-label {
    font-size: .65rem;
    color: var(--text-dim);
    margin-top: 2px;
}

.summary-answers {
    list-style: none;
}

.sa-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 3px solid;
    border-radius: 6px;
    padding: .65rem .85rem;
    margin-bottom: .6rem;
    font-size: .78rem;
    cursor: pointer;
    transition: all .15s;
}

.sa-item:hover {
    transform: translateX(3px);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 5px;
}

::-webkit-scrollbar-track {
    background: var(--surface);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

@media (max-width: 600px) {
    .q-text {
        font-size: .9rem;
    }

    .summary-stats {
        grid-template-columns: 1fr 1fr;
    }
}