/**
 * Podcastify Web App Styles - Dark Premium Theme
 * Aligned with Landing Page Design System
 */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: all var(--transition-normal);
}

a:hover {
    color: var(--accent-secondary);
    text-shadow: var(--glow-text);
}

img {
    max-width: 100%;
    height: auto;
}

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

/* ============================================
   NAVIGATION
   ============================================ */
.main-nav {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: 1.25rem;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: var(--space-2);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-m);
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-normal);
    position: relative;
}

.nav-link:hover {
    background: var(--glass-bg-hover);
    color: var(--text-primary);
    text-shadow: none;
}

.nav-link.active {
    background: var(--gradient-button);
    color: var(--bg-primary);
    box-shadow: var(--glow-primary);
}

.nav-icon {
    font-size: 1.125rem;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.user-credits {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.user-credits:hover {
    border-color: var(--glass-border-glow);
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.2);
}

.user-menu {
    position: relative;
}

.user-button {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--gradient-button);
    color: var(--bg-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 20px rgba(168, 85, 247, 0.3);
}

.user-button:hover {
    transform: scale(1.05);
    box-shadow: var(--glow-primary);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 240px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-l);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--glass-border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
}

.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: var(--space-4);
}

.user-name {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
}

.user-email {
    display: block;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.dropdown-divider {
    height: 1px;
    background: var(--glass-border);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: none;
    background: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--glass-bg-hover);
    color: var(--text-primary);
}

.dropdown-item.text-danger {
    color: var(--danger);
}

.dropdown-item.text-danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

.nav-auth {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.lang-switch-btn {
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-m);
    background: var(--glass-bg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.lang-switch-btn:hover {
    background: var(--glass-bg-hover);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border: none;
    border-radius: var(--radius-m);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-button);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(168, 85, 247, 0.4);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover {
    box-shadow: var(--glow-primary);
    transform: translateY(-2px);
    color: var(--bg-primary);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    box-shadow: 0 0 30px rgba(168, 85, 247, 0.2);
}

.btn-ghost {
    background: var(--glass-bg);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

.btn-ghost:hover {
    background: var(--glass-bg-hover);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

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

.btn-danger:hover {
    background: #dc2626;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
}

.btn-lg {
    padding: var(--space-4) var(--space-6);
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-m);
    font-size: 1rem;
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.2), 0 0 20px rgba(168, 85, 247, 0.1);
}

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

/* Autofill styling for dark mode */
.form-input:-webkit-autofill,
.form-input:-webkit-autofill:hover,
.form-input:-webkit-autofill:focus {
    -webkit-text-fill-color: var(--text-primary);
    -webkit-box-shadow: 0 0 0px 1000px var(--bg-tertiary) inset;
    transition: background-color 5000s ease-in-out 0s;
}

.form-hint {
    margin-top: var(--space-1);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.form-error {
    margin-top: var(--space-1);
    font-size: 0.875rem;
    color: var(--danger);
}

textarea.form-input {
    min-height: 120px;
    resize: vertical;
}

select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a1a1aa' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--glass-bg);
    border-radius: var(--radius-l);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: var(--glass-border-glow);
    box-shadow: 0 0 30px rgba(168, 85, 247, 0.1);
}

.card-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--glass-border);
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--glass-border);
    background: var(--bg-secondary);
    border-radius: 0 0 var(--radius-l) var(--radius-l);
}

/* ============================================
   AUTH PAGES
   ============================================ */
.auth-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

.auth-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    position: relative;
}

/* Glow background effect */
.auth-main::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: var(--gradient-glow);
    filter: blur(100px);
    opacity: 0.5;
    pointer-events: none;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
}

.auth-card .card {
    background: rgba(26, 26, 37, 0.8);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-logo {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    animation: glowPulseSubtle 3s ease-in-out infinite;
}

.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.auth-subtitle {
    color: var(--text-tertiary);
}

.auth-form {
    margin-bottom: var(--space-6);
}

.auth-footer {
    text-align: center;
    color: var(--text-tertiary);
}

.auth-footer a {
    font-weight: 500;
}

.auth-links {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    font-size: 0.875rem;
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-m);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    backdrop-filter: blur(10px);
    border: 1px solid;
}

.alert-success {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
    border-color: rgba(34, 197, 94, 0.3);
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border-color: rgba(239, 68, 68, 0.3);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    border-color: rgba(245, 158, 11, 0.3);
}

.alert-info {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border-color: rgba(59, 130, 246, 0.3);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-4);
    width: 100%;
}

.page-header {
    margin-bottom: var(--space-8);
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.page-subtitle {
    color: var(--text-tertiary);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: var(--space-l) 0;
    position: relative;
}

.section-header {
    margin-bottom: var(--space-m);
}

.section-title {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.section-title .highlight {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
}

/* Section with glow background */
.section-glow {
    position: relative;
}

.section-glow::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 600px;
    background: var(--gradient-glow);
    filter: blur(120px);
    opacity: 0.3;
    pointer-events: none;
    z-index: -1;
}

/* Section divider with glow line */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    margin: var(--space-l) 0;
    opacity: 0.3;
}

/* Content container within sections */
.section-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Feature grid for sections */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-l);
    padding: var(--space-6);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--glass-border-glow);
    box-shadow: var(--glow-primary);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-button);
    border-radius: var(--radius-m);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--space-4);
    box-shadow: var(--glow-primary);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-4);
}

.stat-item {
    text-align: center;
    padding: var(--space-4);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--space-2);
}

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

/* ============================================
   SELECTION CARDS
   ============================================ */
.selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-3);
}

.selection-card {
    padding: var(--space-4);
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-m);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.selection-card:hover {
    border-color: rgba(168, 85, 247, 0.3);
    background: var(--glass-bg-hover);
    transform: translateY(-2px);
}

.selection-card.selected {
    border-color: var(--accent-primary);
    background: rgba(168, 85, 247, 0.1);
    box-shadow: var(--glow-primary);
}

.selection-card.selected::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: var(--gradient-button);
    z-index: -1;
    opacity: 0.1;
}

.selection-icon {
    font-size: 1.5rem;
    margin-bottom: var(--space-2);
}

.selection-title {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: var(--space-1);
    color: var(--text-primary);
}

.selection-desc {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* ============================================
   PODCAST GRID
   ============================================ */
.podcast-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-6);
}

.podcast-card {
    background: var(--glass-bg);
    border-radius: var(--radius-l);
    overflow: hidden;
    border: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
}

.podcast-card:hover {
    border-color: var(--glass-border-glow);
    box-shadow: var(--glow-primary);
    transform: translateY(-4px);
}

.podcast-cover {
    aspect-ratio: 16/9;
    background: var(--gradient-hero);
    background-size: 200% 200%;
    animation: gradientShift 6s ease infinite;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.podcast-info {
    padding: var(--space-4);
}

.podcast-title {
    font-weight: 600;
    margin-bottom: var(--space-2);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--text-primary);
    /* Reserve space for exactly 2 lines */
    line-height: 1.4;
    min-height: calc(1.4em * 2);
}

.podcast-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.podcast-actions {
    display: flex;
    gap: var(--space-2);
    padding: 0 var(--space-4) var(--space-4);
}

.podcast-actions .play-btn {
    flex: 1;
}

.podcast-actions .delete-btn {
    padding: var(--space-2) var(--space-3);
}

/* ============================================
   AUDIO PLAYER
   ============================================ */
.audio-player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-top: 1px solid var(--glass-border-glow);
    padding: var(--space-4);
    box-shadow: 0 -10px 40px rgba(168, 85, 247, 0.1);
    z-index: 100;
}

.player-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

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

.player-title {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.player-controls {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.player-btn {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--gradient-button);
    color: var(--bg-primary);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    box-shadow: var(--glow-primary);
}

.player-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--glow-intense);
}

.player-progress {
    flex: 2;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    cursor: pointer;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-hero);
    border-radius: var(--radius-full);
    transition: width 100ms linear;
    box-shadow: 0 0 10px rgba(168, 85, 247, 0.5);
}

.player-time {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    min-width: 45px;
}

.player-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    margin-left: var(--space-3);
}

.player-close:hover {
    background: var(--glass-bg-hover);
    color: var(--text-primary);
}

/* ============================================
   SPA NAVIGATION
   ============================================ */
#page-content {
    min-height: calc(100vh - 80px);
    transition: opacity 0.15s ease;
}

#page-content.spa-loading {
    opacity: 0.5;
    pointer-events: none;
}

.spa-loader {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
}

.spa-loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================
   CREDITS PAGE
   ============================================ */
.credits-display {
    text-align: center;
    padding: var(--space-8);
    background: var(--gradient-hero);
    background-size: 200% 200%;
    animation: gradientShift 6s ease infinite;
    color: white;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-8);
    box-shadow: var(--glow-primary);
}

.credits-number {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--space-2);
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.5);
}

.credits-label {
    font-size: 1.25rem;
    opacity: 0.9;
}

.credits-packages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.credits-package {
    padding: var(--space-6);
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.credits-package:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--glow-primary);
    transform: translateY(-4px);
}

.package-credits {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-2);
}

.package-price {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-1);
    color: var(--text-primary);
}

.package-hint {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ============================================
   PROGRESS OVERLAY
   ============================================ */
.progress-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.progress-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border-glow);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: var(--glow-primary);
}

.progress-spinner {
    width: 64px;
    height: 64px;
    border: 4px solid var(--glass-border);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-6);
    filter: drop-shadow(0 0 10px rgba(168, 85, 247, 0.6));
}

.progress-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--space-12);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.empty-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.empty-text {
    color: var(--text-tertiary);
    margin-bottom: var(--space-6);
}

/* ============================================
   GRADIENT TEXT UTILITY
   ============================================ */
.gradient-text {
    background: var(--gradient-hero);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 6s ease infinite;
}

.glow-text {
    text-shadow: var(--glow-text);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.hidden { display: none !important; }

/* ============================================
   MOBILE BOTTOM NAVIGATION
   ============================================ */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-top: 1px solid var(--glass-border);
    padding-bottom: env(safe-area-inset-bottom);
    z-index: 1000;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.875rem 0.5rem;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: all var(--transition-fast);
    flex: 1;
}

.mobile-nav-item:hover,
.mobile-nav-item.active {
    color: var(--accent-primary);
}

.mobile-nav-item.active .mobile-nav-icon {
    text-shadow: var(--glow-text);
}

.mobile-nav-icon {
    font-size: 1.5rem;
    line-height: 1;
    height: 1.5rem;
}

.mobile-nav-label {
    font-size: 0.6875rem;
    font-weight: 500;
}

/* Mobile User Avatar in Nav */
.mobile-user-avatar {
    width: 1.75rem;
    height: 1.75rem;
    background: var(--gradient-button);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--bg-primary);
}

.mobile-user-menu-trigger {
    cursor: pointer;
}

/* Mobile User Popup */
.mobile-user-popup {
    display: none;
    position: fixed;
    top: 70px;
    right: 1rem;
    z-index: 9999;
}

.mobile-user-popup.active {
    display: block !important;
}

/* Backdrop when popup is open */
.mobile-user-popup::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: -1;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-popup-content {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-l);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.4);
    min-width: 220px;
    overflow: hidden;
}

.mobile-popup-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
}

.mobile-popup-avatar {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--gradient-button);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--bg-primary);
}

.mobile-popup-user-info {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.mobile-popup-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.mobile-popup-credits {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.mobile-popup-items {
    padding: var(--space-2) 0;
}

.mobile-popup-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--text-primary);
    text-decoration: none;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.mobile-popup-item:hover {
    background: var(--glass-bg);
}

.mobile-popup-item.text-danger {
    color: var(--error);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .nav-container {
        height: 74px;
    }

    .nav-links {
        display: none;
    }

    .mobile-nav {
        display: flex;
    }

    .main-content {
        padding: var(--space-4);
        padding-bottom: calc(var(--space-4) + 70px); /* Space for mobile nav */
    }

    /* Adjust audio player position when mobile nav is visible */
    .audio-player.active {
        bottom: 65px;
    }

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

    .player-container {
        flex-wrap: nowrap;
        gap: var(--space-2);
    }

    .player-info {
        order: 1;
        flex: 0 1 auto;
        max-width: 80px;
        min-width: 60px;
    }

    .player-controls {
        order: 2;
        flex-shrink: 0;
    }

    .player-controls .player-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .player-progress {
        order: 3;
        flex: 1;
    }

    .player-progress .player-time {
        display: none;
    }

    .player-close {
        order: 4;
        flex-shrink: 0;
    }

    .credits-number {
        font-size: 3rem;
    }

    .auth-main::before {
        width: 300px;
        height: 200px;
    }
}

/* Backdrop-filter fallback */
@supports not (backdrop-filter: blur(20px)) {
    .main-nav,
    .audio-player,
    .progress-overlay {
        background: var(--bg-secondary);
    }

    .auth-card .card {
        background: var(--bg-tertiary);
    }
}