:root {
    --bg: #0f1117;
    --surface: #1a1d27;
    --surface-hover: #222633;
    --border: #2a2e3d;
    --border-light: #363b4f;
    --text: #e4e6f0;
    --text-secondary: #8b8fa3;
    --text-muted: #5d6178;
    --accent: #6c5ce7;
    --accent-hover: #7c6ff7;
    --accent-glow: rgba(108, 92, 231, 0.25);
    --success: #00cec9;
    --success-bg: rgba(0, 206, 201, 0.1);
    --error: #ff6b6b;
    --error-bg: rgba(255, 107, 107, 0.08);
    --warning: #feca57;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

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

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

.app {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    padding: 48px 0 32px;
    text-align: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.logo-icon {
    color: var(--accent);
    margin-right: 6px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 6px;
}

/* Main */
.main {
    padding-bottom: 60px;
}

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text);
}

.card-error {
    border-color: var(--error);
    background: var(--error-bg);
}

.card-error h3 {
    color: var(--error);
    margin-bottom: 8px;
}

/* Form */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.optional {
    color: var(--text-muted);
    font-weight: 400;
}

/* Session mode section */
.session-mode-section {
    margin-bottom: 20px;
    padding: 16px 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.session-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.toggle-label {
    cursor: pointer;
}

.toggle-label-text {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
}

.toggle-label-hint {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
    flex-shrink: 0;
    cursor: pointer;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--border-light);
    border-radius: 26px;
    transition: background 0.2s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    left: 3px;
    bottom: 3px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--accent);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(22px);
}

.session-options {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.textarea {
    resize: vertical;
    font-family: inherit;
    min-height: 72px;
}

.form-row {
    display: flex;
    gap: 16px;
}

.form-row .form-group {
    flex: 1;
}

.form-hint {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* File upload */
.file-label {
    cursor: pointer;
}

.file-input {
    display: none;
}

.file-drop-zone {
    border: 2px dashed var(--border-light);
    border-radius: var(--radius);
    padding: 36px 20px;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
}

.file-drop-zone:hover,
.file-drop-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.drop-icon {
    font-size: 2rem;
}

.drop-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.drop-hint {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
    padding: 8px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.file-name {
    font-size: 0.85rem;
    color: var(--accent);
    word-break: break-all;
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
}

.btn-text:hover {
    color: var(--error);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    width: 100%;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Progress */
.progress-container {
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 14px;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    border-radius: 3px;
    transition: width 0.4s ease;
}

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

/* Summary */
.summary-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.summary-header .card-title {
    margin-bottom: 0;
}

.btn-export {
    background: var(--success);
    color: #fff;
    padding: 8px 20px;
    font-size: 0.85rem;
    white-space: nowrap;
}

.btn-export:hover:not(:disabled) {
    background: #00b8b3;
    box-shadow: 0 0 16px rgba(0, 206, 201, 0.3);
}

.btn-export:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
}

.summary-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.summary-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.summary-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

/* Key concepts */
.concepts-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.concept-tag {
    display: inline-block;
    padding: 5px 14px;
    background: var(--accent-glow);
    color: var(--accent);
    border: 1px solid rgba(108, 92, 231, 0.3);
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 500;
}

/* Sessions (session mode) */
.sessions-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.session-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
}

.session-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 6px;
}

.session-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
}

.session-speaker {
    padding: 2px 10px;
    background: rgba(254, 202, 87, 0.12);
    color: var(--warning);
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 500;
}

.session-card-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.session-time {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.78rem;
}

.session-duration {
    color: var(--text-muted);
}

.session-segments {
    color: var(--text-muted);
}

/* Session group headers in cuts list */
.cut-session-header {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--accent);
    padding: 12px 0 4px;
    border-bottom: 1px solid var(--border);
    margin-top: 8px;
}

.cut-session-header:first-child {
    margin-top: 0;
}

.cut-session-speaker {
    color: var(--warning);
    font-weight: 500;
}

.cut-speaker {
    padding: 2px 10px;
    background: rgba(254, 202, 87, 0.12);
    color: var(--warning);
    border-radius: 10px;
    font-size: 0.72rem;
    font-weight: 500;
}

/* Cuts */
.cuts-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.cut-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px;
    transition: border-color 0.2s;
    cursor: pointer;
}

.cut-card:hover {
    border-color: var(--accent);
}

.cut-card-expanded {
    border-color: var(--accent);
}

.cut-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    flex-wrap: wrap;
    gap: 8px;
}

.cut-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--accent);
    color: #fff;
    border-radius: 50%;
    font-size: 0.78rem;
    font-weight: 700;
    flex-shrink: 0;
}

.cut-title {
    font-weight: 600;
    font-size: 0.95rem;
    flex: 1;
    margin-left: 8px;
}

.cut-score {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.78rem;
    font-weight: 600;
}

.cut-score.high {
    background: var(--success-bg);
    color: var(--success);
}

.cut-score.medium {
    background: rgba(254, 202, 87, 0.1);
    color: var(--warning);
}

.cut-score.low {
    background: var(--error-bg);
    color: var(--error);
}

.cut-timestamps {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 0.82rem;
}

.cut-time {
    padding: 3px 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--success);
}

.cut-arrow {
    color: var(--text-muted);
}

.cut-duration {
    color: var(--text-muted);
    font-size: 0.78rem;
    margin-left: auto;
}

.cut-concept {
    display: inline-block;
    padding: 2px 10px;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.cut-reasoning {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.cut-expand-hint {
    display: block;
    margin-top: 6px;
    font-size: 0.72rem;
    color: var(--text-muted);
    text-align: center;
    opacity: 0;
    transition: opacity 0.2s;
}

.cut-card:hover .cut-expand-hint {
    opacity: 1;
}

.cut-card-expanded .cut-expand-hint {
    display: none;
}

/* Timeline bar */
.cut-timeline {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin-top: 10px;
    overflow: hidden;
    position: relative;
}

.cut-timeline-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.3s, margin-left 0.3s;
}

/* Cut preview */
.cut-preview {
    margin-top: 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.cut-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.cut-preview-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.cut-preview-loading {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.cut-preview-loading .spinner {
    width: 12px;
    height: 12px;
    border-width: 2px;
}

.cut-preview-content {
    padding: 8px 0;
    max-height: 300px;
    overflow-y: auto;
}

.preview-line {
    display: flex;
    gap: 12px;
    padding: 5px 14px;
    border-bottom: 1px solid var(--border);
    line-height: 1.5;
}

.preview-line:last-child {
    border-bottom: none;
}

.preview-time {
    flex-shrink: 0;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.72rem;
    color: var(--success);
    white-space: nowrap;
    padding-top: 1px;
}

.preview-text {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.preview-buffer {
    opacity: 0.45;
}

.preview-buffer-legend {
    display: block;
    padding: 6px 14px 4px;
    font-size: 0.7rem;
    color: var(--text-muted);
    font-style: italic;
}

.cut-preview-empty {
    display: block;
    padding: 12px 14px;
    font-size: 0.82rem;
    color: var(--text-muted);
    font-style: italic;
}

/* JSON block */
.json-block {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.78rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text-secondary);
    max-height: 400px;
    overflow-y: auto;
}

.clickable {
    cursor: pointer;
    user-select: none;
}

.clickable:hover {
    color: var(--accent);
}

/* Footer */
.footer {
    text-align: center;
    padding: 24px 0;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    margin-top: 20px;
}

/* Login Screen */
.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 36px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}

.login-logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    text-align: center;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 0.88rem;
    text-align: center;
    margin-bottom: 28px;
}

.login-error {
    background: var(--error-bg);
    border: 1px solid var(--error);
    color: var(--error);
    border-radius: var(--radius-sm);
    padding: 8px 14px;
    font-size: 0.85rem;
    margin-bottom: 16px;
    text-align: center;
}

.btn-login {
    margin-top: 4px;
}

/* Header with logout */
.header-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 6px;
}

.btn-logout {
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: 4px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-logout:hover {
    border-color: var(--error);
    color: var(--error);
    background: var(--error-bg);
}

/* Hidden */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 600px) {
    .app {
        padding: 0 12px;
    }
    .card {
        padding: 20px;
    }
    .header {
        padding: 32px 0 24px;
    }
    .summary-grid {
        grid-template-columns: 1fr 1fr;
    }
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}