/* ============================================
   Audiobook Maker Pro v3.1 - Main Styles
   UPDATED: Archive button visibility, dynamic help button, no hint bar
============================================= */

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Merriweather', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* ============================================
   Welcome Overlay
============================================= */

.welcome-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
    overflow-y: auto;
    padding: 24px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.welcome-card {
    background: white;
    border-radius: 20px;
    padding: 40px 48px;
    max-width: 900px;
    width: 95%;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    text-align: center;
    animation: scaleIn 0.3s ease;
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.welcome-header i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 12px;
    display: block;
}

.welcome-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.welcome-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 32px;
}

.welcome-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 16px;
    margin-bottom: 36px;
}

.welcome-step {
    flex: 1;
    max-width: 260px;
    text-align: center;
}

.welcome-step-number {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    background: var(--primary-color);
    color: white;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.welcome-step-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, #ede9fe, #e0e7ff);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.welcome-step h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.welcome-step-details {
    text-align: left;
}

.welcome-step-details p {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0 0 8px 0;
}

.welcome-step-details p:last-child {
    margin-bottom: 0;
}

.welcome-step-alt {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px dashed var(--border-color);
}

.welcome-alt-label {
    display: block;
    font-size: 0.68rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 4px;
    text-align: center;
}

.welcome-ui-btn {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 2px 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    vertical-align: middle;
}

.welcome-ui-btn i {
    font-size: 0.7rem;
}

.welcome-ui-btn.success-btn {
    background: #d1fae5;
    border-color: #6ee7b7;
    color: #065f46;
}

.welcome-ui-btn.primary-btn {
    background: #e0e7ff;
    border-color: #a5b4fc;
    color: #3730a3;
}

.welcome-ui-dot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    font-size: 0.6rem;
    vertical-align: middle;
    color: white;
}

.welcome-ui-dot.chapter-dot {
    background: #f59e0b;
}

.welcome-step-arrow {
    display: flex;
    align-items: center;
    padding-top: 70px;
    color: var(--text-muted);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.welcome-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.welcome-dismiss-label {
    font-size: 0.82rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .welcome-steps {
        flex-direction: column;
        align-items: center;
    }
    .welcome-step {
        max-width: 100%;
    }
    .welcome-step-details {
        text-align: center;
    }
    .welcome-step-arrow {
        transform: rotate(90deg);
        padding: 8px 0;
    }
    .welcome-card {
        padding: 28px 20px;
    }
}


/* ============================================
   Floating Guide Panel (Draggable)
============================================= */

.floating-guide-panel {
    position: fixed;
    top: 100px;
    right: 24px;
    width: 340px;
    max-height: calc(100vh - 120px);
    background: white;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0,0,0,0.04);
    z-index: 9000;
    display: none;
    flex-direction: column;
    overflow: hidden;
    animation: guideSlideIn 0.3s ease;
    user-select: none;
}

.floating-guide-panel.visible {
    display: flex;
}

@keyframes guideSlideIn {
    from { opacity: 0; transform: translateY(-12px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.guide-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #7c3aed 100%);
    color: white;
    cursor: grab;
    flex-shrink: 0;
}

.guide-panel-header:active {
    cursor: grabbing;
}

.guide-panel-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.guide-panel-title i {
    font-size: 1rem;
}

.guide-panel-controls {
    display: flex;
    gap: 4px;
}

.guide-panel-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(255,255,255,0.15);
    color: white;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 0.75rem;
}

.guide-panel-btn:hover {
    background: rgba(255,255,255,0.3);
}

.guide-panel-body {
    padding: 16px;
    overflow-y: auto;
    flex: 1;
}

.floating-guide-panel.collapsed .guide-panel-body {
    display: none;
}

.guide-section {
    margin-bottom: 16px;
}

.guide-section:last-of-type {
    margin-bottom: 12px;
}

.guide-section-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    background: linear-gradient(135deg, #ede9fe, #e0e7ff);
    color: var(--primary-color);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
}

.guide-section-badge.step3-badge {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #065f46;
}

.guide-instruction {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid #f1f5f9;
}

.guide-instruction:last-child {
    border-bottom: none;
}

.guide-step-num {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.guide-instruction-text {
    font-size: 0.8rem;
    line-height: 1.55;
    color: var(--text-secondary);
}

.guide-instruction-text strong {
    color: var(--text-primary);
}

.guide-ui {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 2px 7px;
    border-radius: 5px;
    font-size: 0.68rem;
    font-weight: 600;
    white-space: nowrap;
    vertical-align: middle;
    line-height: 1;
}

.guide-ui i {
    font-size: 0.62rem;
}

.chapter-marker-ui {
    background: #fef3c7;
    border: 1.5px solid #f59e0b;
    color: #92400e;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    padding: 0;
    justify-content: center;
}

.chapter-marker-ui i {
    font-size: 0.7rem;
}

.voice-dropdown-ui {
    background: #f8fafc;
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 5px;
    gap: 2px;
}

.generate-btn-ui {
    background: #d1fae5;
    border: 1.5px solid #6ee7b7;
    color: #065f46;
    border-radius: 5px;
}

.image-btn-ui {
    background: #cffafe;
    border: 1.5px solid #06b6d4;
    color: #0e7490;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    padding: 0;
    justify-content: center;
}

.image-btn-ui i {
    font-size: 0.7rem;
}

.add-block-btn-ui {
    background: #e0e7ff;
    border: 1.5px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 50%;
    width: 22px;
    height: 22px;
    padding: 0;
    justify-content: center;
}

.add-block-btn-ui i {
    font-size: 0.7rem;
}

.reader-tab-ui {
    background: #f8fafc;
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 5px;
}

.export-btn-ui {
    background: #e0e7ff;
    border: 1.5px solid #a5b4fc;
    color: #3730a3;
    border-radius: 5px;
}

.guide-panel-footer {
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.guide-dont-show {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.guide-dont-show input {
    margin: 0;
}

.floating-guide-toggle {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, #7c3aed 100%);
    color: white;
    border: none;
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.4);
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 8999;
    transition: transform 0.2s, box-shadow 0.2s;
    font-size: 1.2rem;
}

.floating-guide-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.5);
}

.floating-guide-toggle.visible {
    display: flex;
}

@media (max-width: 768px) {
    .floating-guide-panel {
        width: calc(100vw - 32px);
        right: 16px;
        left: 16px;
        top: auto;
        bottom: 72px;
        max-height: 60vh;
    }
    .floating-guide-toggle {
        bottom: 16px;
        right: 16px;
    }
}


/* ============================================
   Workflow Progress Bar
============================================= */

.workflow-progress {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 12px 24px;
    background: white;
    border-bottom: 1px solid var(--border-color);
}

.workflow-step {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: all 0.3s;
}

.workflow-step-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    transition: all 0.3s;
}

.workflow-step.active {
    color: var(--primary-color);
    background: #ede9fe;
}

.workflow-step.active .workflow-step-dot {
    background: var(--primary-color);
    color: white;
}

.workflow-step.completed {
    color: var(--success-color);
}

.workflow-step.completed .workflow-step-dot {
    background: var(--success-color);
    color: white;
    font-size: 0.75rem;
}

.workflow-connector {
    width: 40px;
    height: 2px;
    background: var(--border-color);
    transition: background 0.3s;
}

.workflow-connector.active {
    background: var(--success-color);
}

/* ============================================
   Reader Tab Badge
============================================= */

.reader-tab-badge {
    background: var(--success-color);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ============================================
   Loading Overlay
============================================= */

.loading-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    flex-direction: column;
}

.loading-overlay.active {
    display: flex;
}

.loading-content {
    text-align: center;
}

.loading-content .spinner-border {
    width: 3rem;
    height: 3rem;
    margin-bottom: 1rem;
}

/* ============================================
   App Container & Header
============================================= */

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #7c3aed 100%);
    color: white;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.app-title i {
    font-size: 1.75rem;
}

.version-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.project-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.project-name-input {
    width: 200px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    border-radius: var(--border-radius-sm);
}

.project-name-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.project-name-input:focus {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
    box-shadow: none;
}

/* ============================================
   Header Button Overrides
============================================= */

/* Archive button — visible on purple header */
.btn-header-archive {
    background: rgba(255, 255, 255, 0.12);
    border: 1.5px solid rgba(255, 255, 255, 0.45);
    color: white;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    transition: all 0.2s;
}

.btn-header-archive:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.7);
    color: white;
}

.btn-header-archive:active {
    background: rgba(255, 255, 255, 0.3);
    color: white;
}

/* Help button — pill style, visible on purple header */
.btn-header-help {
    background: rgba(255, 255, 255, 0.12);
    border: 1.5px solid rgba(255, 255, 255, 0.45);
    color: white;
    font-weight: 600;
    font-size: 0.78rem;
    padding: 6px 14px;
    border-radius: 20px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 2px;
}

.btn-header-help:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.7);
    color: white;
}

.btn-header-help:active {
    background: rgba(255, 255, 255, 0.3);
    color: white;
}

.btn-header-help i {
    font-size: 0.9rem;
}

/* User menu button */
.btn-header-user {
    background: rgba(255, 255, 255, 0.12);
    border: 1.5px solid rgba(255, 255, 255, 0.45);
    color: white;
    font-weight: 600;
    font-size: 0.82rem;
    padding: 6px 14px;
    border-radius: 20px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 4px;
}

.btn-header-user:hover,
.btn-header-user:focus,
.btn-header-user.show {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.7);
    color: white;
}

.btn-header-user::after {
    margin-left: 4px;
}


/* ============================================
   Main Content Area
============================================= */

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px;
}

.main-tabs {
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 0;
}

.main-tabs .nav-link {
    color: var(--text-secondary);
    font-weight: 600;
    padding: 12px 24px;
    border: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}

.main-tabs .nav-link:hover {
    color: var(--primary-color);
    border-color: transparent;
}

.main-tabs .nav-link.active {
    color: var(--primary-color);
    background: transparent;
    border-color: var(--primary-color);
}

.tab-content {
    flex: 1;
    background: var(--bg-secondary);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.tab-pane {
    padding: 24px;
}

/* ============================================
   Two-Pathway Upload Layout
============================================= */

.upload-section {
    margin-bottom: 24px;
}

.upload-zone-wrapper {
    display: flex;
    gap: 0;
    align-items: stretch;
    min-height: 380px;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    background: var(--bg-tertiary);
    transition: border-color 0.3s;
}

.upload-zone,
.scratch-zone {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 32px;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    border-radius: 0;
    background: transparent;
    text-align: center;
}

.upload-zone:hover,
.upload-zone.drag-over {
    background: rgba(79, 70, 229, 0.04);
}

.scratch-zone:hover {
    background: rgba(79, 70, 229, 0.04);
}

.upload-content,
.scratch-content {
    max-width: 340px;
}

.upload-icon,
.scratch-icon {
    font-size: 3.5rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    display: block;
    transition: color 0.3s, transform 0.3s;
}

.upload-zone:hover .upload-icon,
.scratch-zone:hover .scratch-icon {
    color: var(--primary-color);
    transform: translateY(-4px);
}

.upload-zone h4,
.scratch-zone h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.upload-hint-text {
    margin-top: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.upload-hint-text i {
    color: var(--primary-color);
}

.pathway-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    flex-shrink: 0;
    position: relative;
    background: transparent;
}

.pathway-divider::before {
    content: '';
    position: absolute;
    top: 15%;
    bottom: 15%;
    left: 50%;
    width: 1px;
    background: var(--border-color);
    transform: translateX(-50%);
}

.pathway-divider span {
    position: relative;
    z-index: 1;
    background: var(--bg-tertiary);
    padding: 10px 6px;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   Editor Section
============================================= */

.editor-section {
    flex: 1;
    min-height: 500px;
}

.editor-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    min-height: 500px;
    padding: 24px 48px;
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.empty-editor-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-muted);
}

.empty-editor-message i {
    font-size: 4rem;
    margin-bottom: 16px;
    display: block;
}

/* ============================================
   Reader Section
============================================= */

.reader-container {
    min-height: 500px;
    font-family: var(--font-serif);
    font-size: 1.125rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.reader-empty-state {
    text-align: center;
    padding: 80px;
    color: var(--text-muted);
}

.reader-empty-state i {
    font-size: 4rem;
    margin-bottom: 16px;
    display: block;
}

/* ============================================
   Buttons
============================================= */

.btn {
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    transition: all 0.2s;
}

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

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

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

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

/* ============================================
   Modals
============================================= */

.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: 20px 24px;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: 16px 24px;
}

/* ============================================
   Project List in Archive
============================================= */

.project-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    margin-bottom: 12px;
    transition: all 0.2s;
}

.project-item:hover {
    border-color: var(--primary-color);
    background: var(--bg-tertiary);
}

.project-info h6 {
    margin: 0 0 4px 0;
    font-weight: 600;
}

.project-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.project-actions {
    display: flex;
    gap: 8px;
}

/* ============================================
   Responsive
============================================= */

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: 16px;
    }
    
    .project-controls {
        width: 100%;
        flex-wrap: wrap;
    }
    
    .project-name-input {
        width: 100%;
    }
    
    .main-content {
        padding: 16px;
    }
    
    .tab-pane {
        padding: 16px;
    }
    
    .editor-container {
        padding: 16px 24px;
    }
    
    .welcome-steps {
        flex-direction: column;
        align-items: center;
    }
    
    .welcome-step-arrow {
        transform: rotate(90deg);
        padding: 8px 0;
    }
    
    .welcome-card {
        padding: 32px 24px;
    }
    
    .workflow-progress {
        padding: 8px 12px;
        gap: 0;
    }
    
    .workflow-step span {
        display: none;
    }
    
    .workflow-connector {
        width: 24px;
    }
    
    /* Two-pathway stacks vertically on mobile */
    .upload-zone-wrapper {
        flex-direction: column;
        min-height: auto;
    }
    
    .upload-zone,
    .scratch-zone {
        padding: 32px 24px;
    }
    
    .pathway-divider {
        width: 100%;
        height: 56px;
        flex-direction: row;
    }
    
    .pathway-divider::before {
        top: 50%;
        bottom: auto;
        left: 15%;
        right: 15%;
        width: auto;
        height: 1px;
        transform: translateY(-50%);
    }
    
    /* Header help button - compact on mobile */
    .btn-header-help #headerHelpLabel {
        display: none;
    }
    
    .btn-header-help {
        padding: 6px 10px;
    }
}