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

[hidden] {
    display: none !important;
}

:root {
    --bg: #f8f9fa;
    --surface: #ffffff;
    --text: #1a1a1a;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --accent: #dbeafe;
    --accent-text: #1e40af;
    --error-bg: #fef2f2;
    --error-text: #dc2626;
    --error-border: #fecaca;
    --highlight: #fef9c3;
    --success: #16a34a;
    --success-bg: #f0fdf4;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111827;
        --surface: #1f2937;
        --text: #f3f4f6;
        --text-secondary: #9ca3af;
        --border: #374151;
        --primary: #3b82f6;
        --primary-hover: #2563eb;
        --accent: #1e3a5f;
        --accent-text: #93c5fd;
        --error-bg: #451a1a;
        --error-text: #f87171;
        --error-border: #7f1d1d;
        --highlight: #422006;
        --success: #4ade80;
        --success-bg: #14532d;
        --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    }
}

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

.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

/* Card */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

/* Section Title */
.section-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--primary);
    background-color: var(--accent);
}

.upload-icon {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.drop-zone p {
    margin: 0.25rem 0;
}

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

/* File Info */
.file-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    margin-top: 1rem;
    background: var(--accent);
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.file-info #file-name {
    font-weight: 500;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-info #file-size {
    color: var(--text-secondary);
    font-size: 0.85rem;
    flex-shrink: 0;
}

/* Buttons */
.btn-primary {
    background: var(--primary);
    color: #ffffff;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

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

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--border);
    padding: 0.4rem 1rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.btn-small {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: transparent;
    color: var(--success);
    border: 1px solid var(--success);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    cursor: pointer;
    transition: background-color 0.2s;
    vertical-align: middle;
}

.btn-small:hover {
    background: var(--success-bg);
}

.btn-small svg {
    flex-shrink: 0;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    line-height: 1;
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    flex-shrink: 0;
}

.btn-icon:hover {
    background: var(--border);
}

/* Upload Controls */
.upload-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
    justify-content: flex-end;
}

.upload-controls select {
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    font-size: 0.9rem;
}

/* =============== Progress Steps =============== */
.progress-steps {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.step {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.step-indicator {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.7rem;
    font-weight: 700;
    transition: all 0.3s;
}

/* Pending */
.step[data-status="pending"] .step-indicator {
    border: 2px solid var(--border);
    background: transparent;
}
.step[data-status="pending"] .step-label {
    color: var(--text-secondary);
}

/* Active / spinning */
.step[data-status="active"] .step-indicator {
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    background: transparent;
    animation: spin 0.8s linear infinite;
}
.step[data-status="active"] .step-label {
    color: var(--text);
    font-weight: 500;
}
.step[data-status="active"] {
    background: var(--accent);
}

/* Done */
.step[data-status="done"] .step-indicator {
    border: none;
    background: var(--success);
    color: #fff;
}
.step[data-status="done"] .step-indicator::after {
    content: "\2713";
}

/* Error */
.step[data-status="error"] .step-indicator {
    border: none;
    background: var(--error-text);
    color: #fff;
}
.step[data-status="error"] .step-indicator::after {
    content: "\2717";
}
.step[data-status="error"] .step-label {
    color: var(--error-text);
}

.step-body {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.step-label {
    font-size: 0.9rem;
    line-height: 1.3;
}

.step-detail {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.3;
}

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

/* =============== Error =============== */
.error-card {
    background: var(--error-bg);
    border-color: var(--error-border);
    color: var(--error-text);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.error-card p {
    flex: 1;
}

/* =============== Audio Compare =============== */
.audio-compare .audio-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.audio-column {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.audio-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.audio-column audio {
    width: 100%;
}

/* =============== Result =============== */
.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.result-header .section-title {
    margin-bottom: 0;
}

.result-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.result-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

/* View Toggle */
.view-toggle {
    display: flex;
    gap: 0;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    width: fit-content;
}

.btn-toggle {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.btn-toggle.active {
    background: var(--primary);
    color: #ffffff;
}

/* =============== Segments / Utterances =============== */
.segments-list {
    max-height: 500px;
    overflow-y: auto;
}

.segment {
    display: flex;
    gap: 0.6rem;
    padding: 0.6rem 0.75rem;
    border-radius: 6px;
    transition: background-color 0.15s;
    align-items: flex-start;
}

.segment:hover {
    background: var(--accent);
}

.segment.active {
    background: var(--highlight);
}

.segment-time {
    font-size: 0.8rem;
    color: var(--accent-text);
    font-family: "SF Mono", "Fira Code", monospace;
    white-space: nowrap;
    padding-top: 0.15rem;
    flex-shrink: 0;
    min-width: 3.5rem;
}

.speaker-badge {
    display: inline-block;
    padding: 0.1rem 0.5rem;
    border-radius: 99px;
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
    margin-top: 0.15rem;
    min-width: 2rem;
    text-align: center;
}

.segment-text {
    flex: 1;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Plain Text View */
.plain-text {
    white-space: pre-wrap;
    font-size: 0.95rem;
    line-height: 1.7;
    max-height: 500px;
    overflow-y: auto;
}

/* New Transcription */
.new-transcription {
    text-align: center;
    margin-top: 0.5rem;
}

/* =============== Top Navbar =============== */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    text-decoration: none;
    color: var(--text);
}

.navbar-brand h1 {
    font-size: 1.1rem;
    font-weight: 700;
}

.navbar-brand .badge-alpha {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--primary);
    background: var(--accent);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.3rem 0.5rem;
    border-radius: var(--radius);
    border: none;
    background: none;
}

.navbar-user:hover {
    background: var(--accent);
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.btn-logout {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.8rem;
    cursor: pointer;
}

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

/* =============== Auth Page =============== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background: var(--bg);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.auth-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
}

.auth-subtitle {
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-top: 0.15rem;
}

.auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.auth-tab {
    flex: 1;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.auth-tab.active {
    background: var(--primary);
    color: #ffffff;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
}

.form-group .optional {
    color: var(--text-secondary);
    font-weight: 400;
}

.form-group input {
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--accent);
}

.auth-submit {
    width: 100%;
    margin-top: 0.25rem;
}

.auth-error {
    margin-top: 1rem;
    padding: 0.6rem 0.75rem;
    background: var(--error-bg);
    color: var(--error-text);
    border: 1px solid var(--error-border);
    border-radius: var(--radius);
    font-size: 0.85rem;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.25rem 0;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.auth-divider::before,
.auth-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}

.btn-google {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
}

.btn-google:hover {
    background: var(--accent);
    border-color: var(--primary);
}

/* =============== Tasks Page =============== */
.page-content {
    max-width: 860px;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}

.tasks-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.tasks-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.tasks-filters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 0.3rem 0.75rem;
    border-radius: 99px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

.filter-btn:hover:not(.active) {
    background: var(--accent);
}

/* Task List */
.task-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.task-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: inherit;
}

.task-card:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.task-info {
    flex: 1;
    min-width: 0;
}

.task-filename {
    font-weight: 500;
    font-size: 0.95rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.task-meta {
    display: flex;
    gap: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.task-preview {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 0.35rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.status-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 99px;
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}

.status-badge.pending {
    background: var(--accent);
    color: var(--accent-text);
}

.status-badge.processing {
    background: var(--accent);
    color: var(--primary);
}

.status-badge.completed {
    background: var(--success-bg);
    color: var(--success);
}

.status-badge.error {
    background: var(--error-bg);
    color: var(--error-text);
}

.task-delete {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.3rem;
    border-radius: 4px;
    font-size: 1.1rem;
    flex-shrink: 0;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s;
}

.task-card:hover .task-delete {
    opacity: 1;
}

.task-delete:hover {
    color: var(--error-text);
    background: var(--error-bg);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state p {
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.pagination button {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    cursor: pointer;
}

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

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

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

/* =============== Responsive =============== */
@media (max-width: 600px) {
    .container {
        padding: 1rem 0.75rem;
    }

    .card {
        padding: 1rem;
    }

    .drop-zone {
        padding: 1.5rem 0.75rem;
    }

    .audio-compare .audio-grid {
        grid-template-columns: 1fr;
    }

    .result-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .upload-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .upload-controls select {
        width: 100%;
    }

    .upload-controls .btn-primary {
        width: 100%;
    }

    .auth-card {
        padding: 1.5rem;
    }

    .navbar {
        padding: 0.5rem 0.75rem;
    }

    .task-meta {
        flex-wrap: wrap;
    }
}