/* ==========================================================================
   RESET AND BASE STYLES
   ========================================================================== */

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

/* CSS Variables */
:root {
    /* Modern dark theme - Figma design */
    --bg-primary: #000000;
    --bg-secondary: #1C1C1E;
    --bg-tertiary: #2C2C2E;
    --bg-elevated: #3A3A3C;

    /* Accent colors */
    --color-accent: #3B9EFF;
    --color-accent-dark: #0A84FF;
    --color-accent-light: #64B5F6;

    /* Course card gradients */
    --gradient-blue: linear-gradient(135deg, #3B9EFF 0%, #1E88E5 100%);
    --gradient-orange: linear-gradient(135deg, #FF9F68 0%, #FF7043 100%);

    /* Text colors */
    --text-primary: #FFFFFF;
    --text-secondary: #8E8E93;
    --text-tertiary: #636366;
    --text-quaternary: #48484A;

    /* System colors */
    --accent-success: #34C759;
    --accent-danger: #FF3B30;
    --accent-warning: #FF9500;

    /* UI elements */
    --border-radius-sm: 12px;
    --border-radius-md: 16px;
    --border-radius-lg: 20px;
    --border-radius-xl: 24px;
    --border-radius-full: 50px;

    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 20px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
}

html {
    overflow-x: hidden;
    overflow-y: auto;
}

body {
    font-family: 'Onest', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'Roboto', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    padding-top: 30px;
}

main {
    padding-bottom: 0;
}

/* ==========================================================================
   LAYOUT COMPONENTS
   ========================================================================== */

/* Container */
.container {
    max-width: 428px;
    margin: 0 auto;
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + 25px);
    overflow-x: hidden;
}

/* Modern Navbar - Hidden for mobile */
.navbar {
    display: none;
}

/* Mobile Header */
.mobile-header {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: var(--spacing-md);
    padding-top: 40px;
    position: sticky;
    top: 0;
    background-color: var(--bg-primary);
    z-index: 100;
}

.mobile-header-title {
    font-size: 24px;
    font-weight: 400;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-lg) 0;
    text-align: left;
    letter-spacing: -0.5px;
}

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

/* User greeting header - Hidden for new design */
.user-greeting {
    display: none;
}

/* User Avatar */
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border: 2px solid var(--bg-elevated);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
    padding: 16px 24px;
    border: none;
    border-radius: var(--border-radius-full);
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    letter-spacing: -0.3px;
}

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

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

.btn-primary:active {
    transform: scale(0.98);
}

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

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1.5px solid var(--bg-tertiary);
}

.btn-outline:hover {
    background-color: var(--bg-secondary);
    border-color: var(--bg-elevated);
}

.btn-danger {
    background-color: var(--accent-danger);
    color: var(--text-primary);
}

.btn-danger:hover {
    opacity: 0.9;
}

.btn-full {
    width: 100%;
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.4rem;
    transition: transform 0.2s;
    color: var(--text-primary);
}

.btn-icon:hover {
    transform: scale(1.1);
}

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

.btn-record {
    margin-top: 1rem;
    width: 100%;
}

/* Page header */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 700;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Section header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2rem 0 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.section-header h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    font-weight: 700;
}

/* Category tags - Hidden for new design */
.category-tags {
    display: none;
}

/* ==========================================================================
   LESSONS & CASES PAGES
   ========================================================================== */

/* Lessons List */
.lessons-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-bottom: var(--spacing-2xl);
}

.lesson-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--bg-secondary);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.lesson-list-item:active {
    background-color: var(--bg-secondary);
}

.lesson-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
}


.lesson-details {
    flex: 1;
    min-width: 0;
}

.lesson-title {
    font-size: 19px;
    font-weight: 300;
    color: var(--text-primary);
    margin-bottom: 1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lesson-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
}

.lesson-count-widget {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(44, 44, 46, 0.8);
    padding: 6px 10px;
    border-radius: 16px;
    flex-shrink: 0;
}

.lesson-count-widget i {
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.lesson-count-number {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1;
}

.case-arrow {
    font-size: 24px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

/* Lecture download button */
.lecture-download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-accent);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.lecture-download-btn:hover {
    background: var(--color-accent-light);
}

.lecture-download-btn:active {
    transform: scale(0.95);
    background: var(--color-accent-dark);
}

.lecture-download-btn i {
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Cases list - Course detail view */
.cases-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding-bottom: 100px;
}

.case-card {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    border: none;
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.case-header h4 {
    font-size: 17px;
    color: var(--text-primary);
    font-weight: 600;
}

.case-duration {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Section headers for cases */
.cases-section-label {
    font-size: 17px;
    font-weight: 400;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    /* margin: 0 0 0; */
    opacity: 80%;
}

/* ==========================================================================
   AUDIO PLAYER
   ========================================================================== */

.audio-player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom));
    z-index: 40;
    border-top-left-radius: var(--border-radius-lg);
    border-top-right-radius: var(--border-radius-lg);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.audio-player-inner {
    max-width: 428px;
    margin: 0 auto;
}

.audio-player-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.audio-player-thumb {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.audio-player-text {
    flex: 1;
    min-width: 0;
}

.audio-player-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.audio-player-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-progress {
    margin-bottom: var(--spacing-sm);
}

.progress-bar {
    position: relative;
    height: 4px;
    background-color: var(--bg-tertiary);
    border-radius: 2px;
    margin-bottom: 4px;
    overflow: visible;
    cursor: pointer;
}

.progress-bar:active {
    cursor: grabbing;
}

.progress-fill {
    position: absolute;
    height: 4px;
    background: var(--text-primary);
    border-radius: 2px;
    width: 0%;
    pointer-events: none;
}

.progress-fill::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: var(--text-primary);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.progress-slider {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    height: 4px;
    opacity: 0;
    cursor: pointer;
}

.player-time {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.player-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
}

.player-controls .btn-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: none;
    color: var(--text-primary);
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
}

.player-controls .play-btn {
    width: 56px;
    height: 56px;
    background: rgba(255,255,255,0.15);
    color: rgba(255,255,255);
    font-size: 24px;
}

.player-controls .btn-icon:active {
    transform: scale(0.95);
}

.player-volume {
    display: none;
}

.speed-select {
    display: none;
}

/* ==========================================================================
   AUTHENTICATION PAGES
   ========================================================================== */

.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 1rem;
}

.auth-card {
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
}

.auth-card h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    text-align: center;
    color: var(--text-primary);
}

.auth-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-footer a {
    color: var(--color-coral);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.9rem;
    background: var(--bg-tertiary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: all 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-coral);
    background: var(--bg-secondary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-tertiary);
}

/* Statistics */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-secondary);
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    border-top: 4px solid var(--color-green);
}

.stat-card:nth-child(2) {
    border-top-color: var(--color-coral);
}

.stat-card:nth-child(3) {
    border-top-color: var(--color-yellow);
}

.stat-card:nth-child(4) {
    border-top-color: var(--color-purple);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

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

/* Table */
.table-container {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow-x: auto;
}

.recordings-table {
    width: 100%;
    border-collapse: collapse;
}

.recordings-table thead {
    background-color: var(--bg-tertiary);
}

.recordings-table th,
.recordings-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.recordings-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.recordings-table tr:last-child td {
    border-bottom: none;
}

.recordings-table tr:hover {
    background-color: var(--bg-tertiary);
}

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

.empty-state a {
    color: var(--color-coral);
    text-decoration: none;
}

/* ==========================================================================
   MODALS & RECORDING
   ========================================================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-primary);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: transparent;
    width: 100%;
    max-width: 428px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + env(safe-area-inset-top));
}

.modal-header h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    flex: 1;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 8px;
}

.modal-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

/* Recording modal - New Design */
.recording-modal-content {
    background: var(--bg-primary);
    width: 100%;
    max-width: 428px;
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
}

.recording-modal-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + 120px);
    background: var(--bg-primary);
    text-align: center;
    flex-shrink: 0;
}

.recording-modal-header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.recording-back-btn {
    background: var(--bg-secondary);
    border: none;
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: var(--border-radius-full);
    font-size: 17px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: background 0.2s ease;
}

.recording-back-btn:active {
    background: var(--bg-tertiary);
}

.recording-menu-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px;
    transition: opacity 0.2s ease;
}

.recording-menu-btn:active {
    opacity: 0.6;
}

.recording-modal-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    overflow: hidden;
    min-height: 0;
}

.recording-case-info {
    text-align: center;
    margin-bottom: var(--spacing-md);
    flex-shrink: 0;
}

.recording-case-title {
    font-size: clamp(20px, 5vw, 28px);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 4px 0;
    letter-spacing: 0;
    text-align: center;
}

.recording-chapter-subtitle {
    font-size: clamp(13px, 3vw, 15px);
    color: var(--text-secondary);
    margin: 0;
    text-align: center;
    font-weight: 400;
}

/* Recording visualization */
.recording-visualization {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    position: relative;
    min-height: 0;
}

.recording-timer-bubble {
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 10px 24px;
    border-radius: var(--border-radius-full);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
}

#recording-timer {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 1px;
    font-variant-numeric: tabular-nums;
}

/* Waveform canvas */
.recording-waveform-container {
    width: 100%;
    max-width: 400px;
    height: clamp(120px, 20vh, 180px);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    flex-shrink: 0;
}

#waveform-canvas {
    display: block;
    margin: 0 auto;
    max-width: 100%;
}

/* Recording control button */
.recording-control-button {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
}

.record-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    padding: 0;
}

.record-btn:active {
    transform: scale(0.95);
}

.pause-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    padding: 0;
    color: var(--text-primary);
}

.pause-btn:active {
    transform: scale(0.95);
}

.pause-btn.paused {
    background: var(--color-accent);
}

.record-btn-inner {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.record-icon {
    width: 24px;
    height: 24px;
    background: var(--text-primary);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.record-btn.recording .record-icon {
    background: var(--accent-danger);
    border-radius: 4px;
}

.record-btn.stopped .record-icon {
    width: 0;
    height: 0;
    border-left: 20px solid var(--text-primary);
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    border-radius: 0;
    background: transparent;
    margin-left: 4px;
}

/* Preview audio player - Same style as main player */
.recording-preview-section {
    width: 100%;
    max-width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    margin-top: var(--spacing-md);
    flex-shrink: 0;
}

.preview-audio-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.preview-audio-thumb {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.preview-audio-text {
    flex: 1;
    min-width: 0;
}

.preview-audio-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.preview-audio-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.preview-player-progress {
    margin-bottom: var(--spacing-sm);
}

.preview-progress-bar {
    position: relative;
    height: 4px;
    background-color: var(--bg-tertiary);
    border-radius: 2px;
    margin-bottom: 4px;
    overflow: hidden;
    cursor: pointer;
}

.preview-progress-fill {
    position: absolute;
    height: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    width: 0%;
    transition: width 0.1s ease;
}

.preview-player-time {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.preview-player-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
}

.preview-btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: none;
    color: var(--text-primary);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.preview-btn-icon:active {
    transform: scale(0.95);
}

.preview-play-btn {
    width: 56px;
    height: 56px;
    background: var(--text-primary);
    color: var(--bg-primary);
    font-size: 24px;
}

/* Bottom action buttons - New Design */
.recording-modal-footer {
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-lg) + env(safe-area-inset-bottom, 16px));
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    flex-shrink: 0;
    gap: 30px;
}

.recording-footer-btn {
    border: none;
    font-size: 14px;
    font-weight: 300;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: transparent;
    color: var(--text-primary);
    padding: 0;
    white-space: nowrap;
}

.recording-footer-btn:active {
    opacity: 0.6;
}

.btn-cancel {
    background: transparent;
    color: var(--accent-danger);
}

.btn-save {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: var(--border-radius-full);
    padding: 14px 40px;
    font-size: 17px;
    font-weight: 600;
}

.btn-save:active {
    transform: scale(0.96);
    opacity: 1;
}

.btn-retry {
    background: transparent;
    color: var(--text-primary);
}

.retry-icon {
    font-size: 20px;
    font-weight: 600;
}

/* Old modal footer styles */
.modal-footer {
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom));
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.modal-footer .btn {
    flex: 1;
    max-width: 120px;
}

.btn-text-danger {
    background: transparent;
    color: var(--accent-danger);
    border: none;
    padding: 12px 24px;
}

.btn-text-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 12px 24px;
}

.preview-controls {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    width: 100%;
}

#preview-section {
    width: 100%;
}

#preview-section h4 {
    display: none;
}

#preview-audio {
    width: 100%;
    filter: invert(1);
    margin: var(--spacing-md) 0;
}

/* Admin */
.tabs-mobile-select {
    display: none;
    width: 100%;
    padding: 0.75rem 1rem;
    margin-bottom: 2rem;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-weight: 500;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s;
}

.tabs-mobile-select:focus {
    outline: none;
    border-color: var(--color-coral);
}

.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: all 0.2s;
    margin-bottom: -2px;
    white-space: nowrap;
    flex-shrink: 0;
}

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

.tab-btn.active {
    color: var(--color-coral);
    border-bottom-color: var(--color-coral);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.admin-item-card {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    margin-bottom: 1rem;
}

.admin-item-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
}

.admin-item-header h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.admin-item-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.admin-item-header small {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.admin-item-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.filters select {
    padding: 0.6rem;
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
}

/* ==========================================================================
   UTILITY COMPONENTS
   ========================================================================== */

/* Toast notifications */
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
}

.toast {
    background: var(--bg-secondary);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    margin-bottom: 0.5rem;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
    max-width: 300px;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-success {
    border-left: 4px solid var(--accent-success);
}

.toast-error {
    border-left: 4px solid var(--accent-danger);
}

.toast-warning {
    border-left: 4px solid var(--accent-warning);
}

.toast-info {
    border-left: 4px solid var(--color-blue);
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--color-coral);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* User recordings section */
.user-recordings-section {
    margin-top: var(--spacing-md);
}

.user-recordings-section h5 {
    display: none;
}

.user-recordings-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.recording-item {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.recording-item img,
.recording-item .recording-avatar {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
}

.recording-avatar {
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

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

.recording-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.recording-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
}

/* Playing waves animation */
.playing-waves {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    height: 20px;
}

.playing-waves .wave-bar {
    width: 3px;
    height: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}

.playing-waves .wave-bar:nth-child(1) {
    animation-delay: 0s;
}

.playing-waves .wave-bar:nth-child(2) {
    animation-delay: 0.2s;
}

.playing-waves .wave-bar:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes wave {
    0%, 100% {
        transform: scaleY(0.3);
    }
    50% {
        transform: scaleY(1);
    }
}

/* Fixed bottom button */
.fixed-bottom-btn {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom));
    background: var(--bg-secondary);
    z-index: 50;
    border-top-left-radius: var(--border-radius-lg);
    border-top-right-radius: var(--border-radius-lg);
}

.fixed-bottom-btn.player-active {
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

.fixed-bottom-btn .btn {
    width: 100%;
    max-width: 428px;
    margin: 0 auto;
    display: flex;
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 768px) {
    .navbar-container {
        flex-direction: column;
        gap: 1rem;
    }

    .navbar-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .navbar-user {
        width: 100%;
        text-align: center;
    }

    .lessons-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .player-controls {
        flex-wrap: wrap;
    }

    .player-volume {
        display: none;
    }

    .auth-card {
        padding: 2rem;
    }

    .timer {
        font-size: 2rem;
    }

    .table-container {
        overflow-x: scroll;
    }

    .recordings-table {
        min-width: 600px;
    }

    .tabs-mobile-select {
        display: block;
    }

    .tabs {
        display: none;
    }

    .user-greeting {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .filters {
        flex-direction: column;
    }

    .lesson-card h3 {
        font-size: 1.2rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }
}