/* ========================================
   English Fluency Coach - Styles
   Modern dark theme, beginner-friendly
======================================== */

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #22d3ee;
    --accent-glow: rgba(34, 211, 238, 0.3);
    --success: #4ade80;
    --warning: #fbbf24;
    --error: #f87171;
    --recording: #ef4444;
    --radius: 16px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 24px 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 24px;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 4px;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, opacity 0.3s;
}

.hidden {
    display: none !important;
}

/* IELTS Config Section */
.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.config-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}

.config-select {
    padding: 10px 12px;
    background: var(--bg-card);
    border: 1px solid transparent;
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    min-width: 0;
}

.checkbox-pill {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--bg-card);
    border-radius: 8px;
    align-self: end;
}

.checkbox-pill.span-2 {
    grid-column: span 2;
}

.checkbox-pill label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
}

.config-item label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.config-select:hover {
    border-color: var(--accent);
}

.config-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.generate-btn {
    width: 100%;
    padding: 14px 20px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #a78bfa, #818cf8);
    color: white;
    cursor: pointer;
    transition: all 0.2s;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(167, 139, 250, 0.4);
}

.generate-btn:active {
    transform: translateY(0);
}

/* Custom Question Section */
.custom-question-section {
    margin-bottom: 16px;
}

.custom-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

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

.custom-input {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--bg-card);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.custom-input:focus {
    outline: none;
    border-color: var(--accent);
}

.custom-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.enter-btn {
    background: var(--success);
    color: var(--bg-primary);
    border: none;
    border-radius: 8px;
    padding: 10px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.enter-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74, 222, 128, 0.3);
}

.button-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.button-divider::before,
.button-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--bg-card);
}

/* Question Display */
.question-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.question-display {
    background: var(--bg-card);
    padding: 16px;
    border-radius: 10px;
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-primary);
    border-left: 3px solid var(--accent);
}

.question-display ul {
    margin: 12px 0;
    padding-left: 24px;
    list-style-position: outside;
}

.question-display li {
    margin-bottom: 6px;
}

.question-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 12px;
    text-align: center;
}

/* Checkbox Row */
.checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding: 10px 12px;
    background: var(--bg-card);
    border-radius: 8px;
}

.checkbox {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
}

.checkbox-row label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
}

/* Ideal Answer Collapsible */
.ideal-answer-container {
    margin-top: 16px;
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.1), rgba(129, 140, 248, 0.1));
    border-radius: 10px;
    overflow: hidden;
}

.ideal-answer-toggle {
    padding: 12px 16px;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--accent);
    font-weight: 500;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.ideal-answer-toggle::-webkit-details-marker {
    display: none;
}

.ideal-answer-toggle::before {
    content: '\25b6';
    font-size: 0.75rem;
    transition: transform 0.2s;
}

details[open] .ideal-answer-toggle::before {
    transform: rotate(90deg);
}

.ideal-answer-text {
    padding: 0 16px 16px;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-primary);
    opacity: 0.9;
}

/* TTS Controls */
.tts-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.tts-btn.secondary {
    background: var(--bg-card);
    color: var(--text-primary);
}

.tts-btn.secondary:hover {
    background: var(--bg-primary);
}

/* Timer */
.timer {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    font-variant-numeric: tabular-nums;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.timer.recording {
    color: var(--recording);
    animation: pulse 1s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

/* Audio Level Indicator */
.audio-level-container {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border-radius: 10px;
    margin-bottom: 20px;
}

.audio-level-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.audio-level-bar-wrapper {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.audio-level-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    width: 0%;
    transition: width 0.1s ease-out;
    border-radius: 4px;
}

.audio-level-text {
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 600;
    min-width: 45px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* Record Button */
.record-btn {
    width: 100%;
    padding: 20px;
    font-size: 1.25rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), #06b6d4);
    color: var(--bg-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.record-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.record-btn:active {
    transform: translateY(0);
}

.record-btn.recording {
    background: linear-gradient(135deg, var(--recording), #dc2626);
    animation: glow 1.5s infinite;
}

@keyframes glow {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
    }

    50% {
        box-shadow: 0 0 40px rgba(239, 68, 68, 0.6);
    }
}

.record-icon {
    font-size: 1.5rem;
}

.hint {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 12px;
}

/* Processing */
.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-card);
    border-top-color: var(--accent);
    border-radius: 50%;
    margin: 0 auto 16px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

#processing-status {
    text-align: center;
    color: var(--text-secondary);
}

/* Results */
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.result-header h2 {
    font-size: 1.25rem;
}

.score-badge {
    background: var(--success);
    color: var(--bg-primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 1.1rem;
}

.score-badge.medium {
    background: var(--warning);
}

.score-badge.low {
    background: var(--error);
}

.result-block {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--bg-card);
}

.result-block:last-of-type {
    border-bottom: none;
}

.result-block h3 {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.transcription-text {
    background: var(--bg-card);
    padding: 12px 16px;
    border-radius: 8px;
    font-style: italic;
    color: var(--text-secondary);
}

.transcription-note {
    font-size: 0.8rem;
    color: var(--warning);
    margin-top: 8px;
    padding: 8px 12px;
    background: rgba(251, 191, 36, 0.1);
    border-radius: 6px;
    border-left: 3px solid var(--warning);
}

.corrected-text {
    background: rgba(74, 222, 128, 0.1);
    border-left: 3px solid var(--success);
    padding: 12px 16px;
    border-radius: 0 8px 8px 0;
    color: var(--success);
}

.tts-btn {
    margin-top: 12px;
    padding: 10px 20px;
    background: var(--bg-card);
    border: 2px solid var(--accent);
    color: var(--accent);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.tts-btn:hover {
    background: var(--accent);
    color: var(--bg-primary);
}

/* Disabled state for TTS controls and selects */
.tts-btn.disabled,
.tts-btn:disabled,
.config-select.disabled,
.config-select:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
    filter: grayscale(100%);
}

.tts-btn.disabled:hover,
.config-select.disabled:hover {
    background: var(--bg-card);
    border-color: transparent;
    transform: none;
}

.issues-list {
    list-style: none;
    padding: 0;
}

.issues-list li {
    background: var(--bg-card);
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.issues-list li:last-child {
    margin-bottom: 0;
}

.secondary-btn {
    width: 100%;
    padding: 14px;
    background: transparent;
    border: 2px solid var(--text-secondary);
    color: var(--text-secondary);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.secondary-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Footer */
footer {
    margin-top: auto;
    text-align: center;
    padding-top: 16px;
}

.settings-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.settings-row label {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.voice-select {
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-card);
    color: var(--text-primary);
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    max-width: 200px;
}

.voice-select:hover {
    border-color: var(--accent);
}

.voice-select:focus {
    outline: none;
    border-color: var(--accent);
}

.export-btn {
    padding: 10px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-card);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.export-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 12px;
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 16px 12px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .timer {
        font-size: 2.5rem;
    }

    .record-btn {
        padding: 16px;
        font-size: 1.1rem;
    }
}