/* ====================================================================
   BRIGHTSCRIBE — Voice Notes & AI Transcription
   Tích hợp vào Admin Panel, dành cho role teacher+
   ==================================================================== */

/* --- Variables --- */
.brightscribe-app {
    --bs-primary: #7c3aed;
    --bs-primary-light: #a78bfa;
    --bs-primary-dark: #5b21b6;
    --bs-accent: #06b6d4;
    --bs-success: #10b981;
    --bs-danger: #ef4444;
    --bs-warning: #f59e0b;
    --bs-bg: #0f0f1a;
    --bs-surface: #1a1a2e;
    --bs-surface-2: #242442;
    --bs-surface-3: #2d2d52;
    --bs-text: #e2e8f0;
    --bs-text-muted: #94a3b8;
    --bs-border: rgba(124, 58, 237, 0.15);
    --bs-glow: rgba(124, 58, 237, 0.4);
    --bs-radius: 16px;
    --bs-radius-sm: 10px;
    --bs-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- App Layout --- */
.brightscribe-app {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 24px;
    min-height: calc(100vh - 200px);
    color: var(--bs-text);
}

.bs-main-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.bs-sidebar-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* --- Recorder Card --- */
.bs-recorder-card {
    background: var(--bs-surface);
    border-radius: var(--bs-radius);
    border: 1px solid var(--bs-border);
    padding: 32px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.bs-recorder-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--bs-primary), var(--bs-accent), var(--bs-primary));
    background-size: 200% 100%;
    animation: bs-gradient-shift 3s ease infinite;
}

@keyframes bs-gradient-shift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.bs-recorder-header {
    margin-bottom: 24px;
}

.bs-recorder-header h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 0 4px;
    background: linear-gradient(135deg, var(--bs-primary-light), var(--bs-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bs-recorder-header p {
    color: var(--bs-text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* Subject Selector */
.bs-subject-select {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.bs-subject-select label {
    font-size: 0.8rem;
    color: var(--bs-text-muted);
    width: 100%;
    margin-bottom: 4px;
}

.bs-subject-btn {
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid var(--bs-border);
    background: var(--bs-surface-2);
    color: var(--bs-text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--bs-transition);
}

.bs-subject-btn:hover {
    border-color: var(--bs-primary-light);
    color: var(--bs-text);
}

.bs-subject-btn.active {
    background: var(--bs-primary);
    border-color: var(--bs-primary);
    color: #fff;
    box-shadow: 0 0 20px var(--bs-glow);
}

/* Mic Button */
.bs-mic-container {
    position: relative;
    display: inline-block;
    margin: 20px 0;
}

.bs-mic-btn {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--bs-primary), var(--bs-primary-dark));
    color: #fff;
    font-size: 2.2rem;
    cursor: pointer;
    position: relative;
    z-index: 2;
    transition: var(--bs-transition);
    box-shadow: 0 4px 30px var(--bs-glow);
}

.bs-mic-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 40px var(--bs-glow);
}

.bs-mic-btn.recording {
    background: linear-gradient(135deg, var(--bs-danger), #dc2626);
    box-shadow: 0 0 40px rgba(239, 68, 68, 0.5);
    animation: bs-mic-pulse 1.5s ease-in-out infinite;
}

@keyframes bs-mic-pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

/* Waveform rings */
.bs-wave-rings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    pointer-events: none;
}

.bs-wave-ring {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    border: 2px solid var(--bs-primary);
    opacity: 0;
}

.bs-mic-btn.recording~.bs-wave-rings .bs-wave-ring {
    animation: bs-ring-expand 2s ease-out infinite;
}

.bs-wave-ring:nth-child(2) {
    animation-delay: 0.5s;
}

.bs-wave-ring:nth-child(3) {
    animation-delay: 1s;
}

@keyframes bs-ring-expand {
    0% {
        transform: scale(1);
        opacity: 0.6;
    }

    100% {
        transform: scale(2.5);
        opacity: 0;
    }
}

/* Timer & Status */
.bs-recording-status {
    margin-top: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.bs-timer {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--bs-text);
    letter-spacing: 2px;
}

.bs-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--bs-text-muted);
}

.bs-status-dot.recording {
    background: var(--bs-danger);
    animation: bs-blink 1s ease infinite;
}

@keyframes bs-blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.3;
    }
}

.bs-status-label {
    font-size: 0.9rem;
    color: var(--bs-text-muted);
}

/* Action Buttons */
.bs-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

.bs-btn {
    padding: 10px 22px;
    border-radius: var(--bs-radius-sm);
    border: 1px solid var(--bs-border);
    background: var(--bs-surface-2);
    color: var(--bs-text);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--bs-transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.bs-btn:hover {
    background: var(--bs-surface-3);
    border-color: var(--bs-primary-light);
    transform: translateY(-1px);
}

.bs-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}

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

.bs-btn-primary:hover {
    background: var(--bs-primary-dark);
    box-shadow: 0 4px 20px var(--bs-glow);
}

.bs-btn-success {
    background: var(--bs-success);
    border-color: var(--bs-success);
    color: #fff;
}

.bs-btn-danger {
    background: var(--bs-danger);
    border-color: var(--bs-danger);
    color: #fff;
}

/* --- Transcript Card --- */
.bs-transcript-card {
    background: var(--bs-surface);
    border-radius: var(--bs-radius);
    border: 1px solid var(--bs-border);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 300px;
}

.bs-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--bs-border);
}

.bs-card-header h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.bs-card-header h4 i {
    color: var(--bs-primary-light);
}

.bs-tab-switcher {
    display: flex;
    gap: 4px;
    background: var(--bs-surface-2);
    border-radius: 8px;
    padding: 3px;
}

.bs-tab-btn {
    padding: 6px 14px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--bs-text-muted);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--bs-transition);
}

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

.bs-transcript-body {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    font-size: 0.95rem;
    line-height: 1.8;
}

.bs-transcript-body::-webkit-scrollbar {
    width: 5px;
}

.bs-transcript-body::-webkit-scrollbar-track {
    background: transparent;
}

.bs-transcript-body::-webkit-scrollbar-thumb {
    background: var(--bs-surface-3);
    border-radius: 10px;
}

.bs-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--bs-text-muted);
    text-align: center;
    gap: 12px;
}

.bs-empty-state i {
    font-size: 3rem;
    opacity: 0.3;
}

.bs-empty-state p {
    font-size: 0.95rem;
}

/* Live transcript lines */
.bs-line {
    padding: 6px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    transition: background 0.2s;
}

.bs-line:hover {
    background: rgba(124, 58, 237, 0.05);
    border-radius: 6px;
    padding-left: 8px;
}

.bs-line-interim {
    color: var(--bs-text-muted);
    font-style: italic;
}

/* AI corrections highlight */
.bs-correction {
    background: rgba(16, 185, 129, 0.15);
    border-radius: 3px;
    padding: 0 3px;
    border-bottom: 2px solid var(--bs-success);
}

/* --- Sidebar: Notes List --- */
.bs-notes-card {
    background: var(--bs-surface);
    border-radius: var(--bs-radius);
    border: 1px solid var(--bs-border);
    flex: 1;
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 260px);
}

.bs-search-box {
    padding: 12px 16px;
    border-bottom: 1px solid var(--bs-border);
}

.bs-search-box input {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--bs-radius-sm);
    border: 1px solid var(--bs-border);
    background: var(--bs-surface-2);
    color: var(--bs-text);
    font-size: 0.9rem;
    outline: none;
    transition: var(--bs-transition);
}

.bs-search-box input:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.bs-search-box input::placeholder {
    color: var(--bs-text-muted);
}

.bs-notes-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.bs-note-item {
    padding: 14px 16px;
    border-radius: var(--bs-radius-sm);
    cursor: pointer;
    transition: var(--bs-transition);
    border: 1px solid transparent;
    margin-bottom: 6px;
}

.bs-note-item:hover {
    background: var(--bs-surface-2);
    border-color: var(--bs-border);
}

.bs-note-item.active {
    background: rgba(124, 58, 237, 0.1);
    border-color: var(--bs-primary);
}

.bs-note-title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.bs-note-title .subject-tag {
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--bs-primary);
    color: #fff;
    font-weight: 500;
}

.bs-note-meta {
    font-size: 0.8rem;
    color: var(--bs-text-muted);
    display: flex;
    gap: 12px;
}

.bs-note-preview {
    font-size: 0.82rem;
    color: var(--bs-text-muted);
    margin-top: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* --- AI Status Badge --- */
.bs-ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.bs-ai-badge.processing {
    background: rgba(245, 158, 11, 0.15);
    color: var(--bs-warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.bs-ai-badge.processing i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

.bs-ai-badge.done {
    background: rgba(16, 185, 129, 0.15);
    color: var(--bs-success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.bs-ai-badge.error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--bs-danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* --- Title Input --- */
.bs-title-input {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--bs-radius-sm);
    border: 1px solid var(--bs-border);
    background: var(--bs-surface-2);
    color: var(--bs-text);
    font-size: 0.9rem;
    outline: none;
    margin-bottom: 16px;
    transition: var(--bs-transition);
}

.bs-title-input:focus {
    border-color: var(--bs-primary);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .brightscribe-app {
        grid-template-columns: 1fr;
    }

    .bs-sidebar-panel {
        order: -1;
    }

    .bs-notes-card {
        max-height: 300px;
    }
}

@media (max-width: 640px) {
    .bs-recorder-card {
        padding: 20px 16px;
    }

    .bs-mic-btn {
        width: 80px;
        height: 80px;
        font-size: 1.8rem;
    }

    .bs-timer {
        font-size: 1.4rem;
    }

    .bs-subject-select {
        gap: 6px;
    }

    .bs-subject-btn {
        padding: 4px 12px;
        font-size: 0.8rem;
    }
}