/* AI Chat - Premium Stylesheet */

/* CSS Variables - Light Theme (Default) */
:root {
    --primary: #6366F1;
    --primary-light: #818CF8;
    --primary-dark: #4F46E5;
    --secondary: #F59E0B;
    --background: #F8FAFC;
    --surface: #FFFFFF;
    --surface-elevated: #FFFFFF;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --border: #E2E8F0;
    --user-bubble: linear-gradient(135deg, #6366F1, #8B5CF6);
    --ai-bubble: #F1F5F9;
    --success: #10B981;
    --error: #EF4444;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 24px;
    --font-size-2xl: 28px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
[data-theme="dark"] {
    --primary: #818CF8;
    --primary-light: #A5B4FC;
    --primary-dark: #6366F1;
    --secondary: #FBBF24;
    --background: #0F172A;
    --surface: #1E293B;
    --surface-elevated: #334155;
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --border: #334155;
    --user-bubble: linear-gradient(135deg, #818CF8, #A78BFA);
    --ai-bubble: #334155;
    --success: #34D399;
    --error: #F87171;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(129, 140, 248, 0.3);
}

/* Pink Theme */
[data-theme="pink"] {
    --primary: #EC4899;
    --primary-light: #F472B6;
    --primary-dark: #DB2777;
    --secondary: #8B5CF6;
    --background: #FDF2F8;
    --surface: #FFFFFF;
    --text-primary: #831843;
    --text-secondary: #9D174D;
    --border: #F9A8D4;
    --user-bubble: linear-gradient(135deg, #EC4899, #F472B6);
    --ai-bubble: #FCE7F3;
    --shadow-glow: 0 0 20px rgba(236, 72, 153, 0.3);
}

/* Ocean Theme */
[data-theme="ocean"] {
    --primary: #0EA5E9;
    --primary-light: #38BDF8;
    --primary-dark: #0284C7;
    --secondary: #14B8A6;
    --background: #F0F9FF;
    --surface: #FFFFFF;
    --text-primary: #0C4A6E;
    --text-secondary: #0369A1;
    --border: #7DD3FC;
    --user-bubble: linear-gradient(135deg, #0EA5E9, #38BDF8);
    --ai-bubble: #E0F2FE;
    --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.3);
}

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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--background);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    touch-action: manipulation;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

#app {
    height: 100%;
    display: flex;
    flex-direction: column;
    background: var(--background);
}

/* Page */
.page {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    background: var(--background);
    z-index: 1;
}

.page.active { z-index: 10; }

/* Login Page - Premium */
#login-page {
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.login-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.login-bg .bg-gradient {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    animation: bgFloat 20s ease-in-out infinite;
}

.login-bg .bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%236366F1' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-2%, 2%) rotate(1deg); }
}

.login-container {
    width: 100%;
    max-width: 380px;
    padding: var(--spacing-xl);
    background: var(--surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 1;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.logo-container {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.logo-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 80px;
    height: 80px;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(129, 140, 248, 0.4) 0%, transparent 70%);
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

.logo {
    position: relative;
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.login-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.tagline {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Form Styles - Premium */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    color: var(--text-secondary);
    pointer-events: none;
    transition: color var(--transition);
}

.input-wrapper:focus-within .input-icon {
    color: var(--primary);
}

.form-group input {
    width: 100%;
    padding: 14px 14px 14px 44px;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition);
    font-family: var(--font-family);
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

.password-input input {
    padding-right: 44px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition);
}

.toggle-password:hover { color: var(--primary); }

/* Form Options */
.form-options {
    display: flex;
    align-items: center;
    margin-top: var(--spacing-xs);
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.checkbox-wrapper input {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-radius: 4px;
    position: relative;
    transition: all var(--transition);
}

.checkbox-wrapper input:checked + .checkmark {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-wrapper input:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label {
    user-select: none;
}

/* Error Message */
.error-message {
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    border-radius: var(--radius-sm);
    color: var(--error);
    font-size: var(--font-size-sm);
    text-align: center;
    animation: shake 0.4s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Buttons - Premium */
.btn-primary {
    width: 100%;
    padding: 14px var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: #FFFFFF;
    background: var(--primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover::before { opacity: 1; }

.btn-primary:active { transform: translateY(0); }

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.spinner {
    animation: spin 1s linear infinite;
}

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

.btn-secondary {
    padding: 12px var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--primary);
    background: transparent;
    border: 2px solid var(--primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-secondary:hover {
    background: var(--primary);
    color: #FFFFFF;
}

.btn-danger {
    padding: 12px var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--error);
    background: transparent;
    border: 2px solid var(--error);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    width: 100%;
}

.btn-danger:hover {
    background: var(--error);
    color: #FFFFFF;
}

.btn-logout {
    width: 100%;
    padding: 14px var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-primary);
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

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

.btn-link {
    background: none;
    border: none;
    color: var(--primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    padding: 0;
    transition: color var(--transition);
}

.btn-link:hover { color: var(--primary-dark); text-decoration: underline; }

/* Auth Toggle */
.auth-toggle {
    margin-top: var(--spacing-lg);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* App Info */
.app-info {
    margin-top: var(--spacing-lg);
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Header - Premium */
.page-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.home-header {
    background: linear-gradient(180deg, var(--surface) 0%, var(--surface) 90%, transparent 100%);
    padding-bottom: var(--spacing-lg);
    border-bottom: none;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-md);
}

.header-text h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.user-greeting {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.back-btn, .menu-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}

.back-btn:hover, .menu-btn:hover { background: var(--border); }

.header-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-left: var(--spacing-md);
}

.header-content h1, .header-content h2 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Page Content */
.page-content {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.home-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Welcome Card */
.welcome-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    color: white;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-glow);
    animation: slideUp 0.5s ease-out 0.1s both;
}

.welcome-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.welcome-text h2 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.welcome-text p {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: var(--spacing-md);
}

.action-btn {
    flex: 1;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    border: none;
}

.action-btn.primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.action-btn.primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Sessions Section */
.sessions-section {
    flex: 1;
}

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

.section-header h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
}

.session-count {
    background: var(--border);
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* Sessions List */
.sessions-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.session-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--surface);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
    box-shadow: var(--shadow-sm);
}

.session-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.session-item:active { transform: scale(0.98); }

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

.session-title {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.session-preview {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-time {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-left: var(--spacing-sm);
    white-space: nowrap;
}

.session-delete {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    opacity: 0;
    transition: all var(--transition);
}

.session-item:hover .session-delete { opacity: 1; }

.session-delete:hover { color: var(--error); }

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xxl);
    text-align: center;
    color: var(--text-secondary);
}

.empty-state p {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* Bottom Navigation */
.bottom-nav {
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding-bottom: calc(var(--spacing-sm) + env(safe-area-inset-bottom));
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.05);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    border-radius: var(--radius-md);
    min-width: 64px;
}

.nav-item:hover, .nav-item.active {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Chat Page */
.chat-header {
    background: var(--surface);
}

.chat-content {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom));
}

/* Messages */
.message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: fadeIn 0.3s ease;
}

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

.message.user { align-self: flex-end; align-items: flex-end; }
.message.ai { align-self: flex-start; align-items: flex-start; }

.message-bubble {
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    word-wrap: break-word;
    white-space: pre-wrap;
    line-height: 1.6;
}

.message.user .message-bubble {
    background: var(--user-bubble);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.ai .message-bubble {
    background: var(--ai-bubble);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.message-time {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 4px;
    padding: 0 4px;
}

/* Chat Input */
.chat-input-area {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding-bottom: calc(var(--spacing-sm) + env(safe-area-inset-bottom));
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-sm);
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 6px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.input-container:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

#message-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 10px 12px;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    outline: none;
    resize: none;
    max-height: 120px;
    font-family: var(--font-family);
    line-height: 1.5;
}

#message-input::placeholder { color: var(--text-secondary); }

.send-btn {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
}

.send-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

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

.send-btn:disabled {
    background: var(--border);
    cursor: not-allowed;
    transform: none;
}

/* Typing Indicator */
.typing-indicator {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--surface);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    z-index: 50;
}

.typing-dots { display: flex; gap: 4px; }

.typing-dots span {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.6; }
    30% { transform: translateY(-4px); opacity: 1; }
}

/* Settings Page */
.settings-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding-bottom: calc(var(--spacing-lg) + env(safe-area-inset-bottom));
}

.settings-section {
    background: var(--surface);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.settings-section h3 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
}

/* Profile Card */
.profile-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.profile-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-md);
}

.profile-info h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
    text-transform: none;
}

.profile-info p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: none;
    margin: 0;
}

/* API Status */
.api-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--success);
    margin-bottom: var(--spacing-md);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Theme Grid */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.theme-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
}

.theme-card:hover { border-color: var(--text-secondary); }

.theme-card.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.theme-preview {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border);
}

.light-preview { background: linear-gradient(135deg, #FFFFFF 50%, #F8FAFC 50%); }
.dark-preview { background: linear-gradient(135deg, #1E293B 50%, #0F172A 50%); }
.pink-preview { background: linear-gradient(135deg, #FDF2F8 50%, #FCE7F3 50%); }
.ocean-preview { background: linear-gradient(135deg, #F0F9FF 50%, #E0F2FE 50%); }

.theme-card span {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* About */
.about-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.about-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border);
    font-size: var(--font-size-sm);
}

.about-row:last-child { border-bottom: none; }

.about-row span:first-child { color: var(--text-secondary); }
.about-row span:last-child { color: var(--text-primary); font-weight: 500; }

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 320px;
    animation: modalIn 0.2s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.modal-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.modal-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: background var(--transition);
}

.modal-item:hover { background: var(--border); }
.modal-item.danger { color: var(--error); }
.modal-item.danger:hover { background: rgba(239, 68, 68, 0.1); }

.modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.modal-actions button { flex: 1; }

#session-name-input {
    width: 100%;
    padding: 12px var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    outline: none;
    font-family: var(--font-family);
}

#session-name-input:focus { border-color: var(--primary); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* Selection */
::selection { background: var(--primary); color: white; }

/* Responsive */
@media (min-width: 481px) {
    .page {
        max-width: 480px;
        margin: 0 auto;
        box-shadow: var(--shadow-xl);
    }
    body { background: var(--border); }
    #login-page { max-width: none; box-shadow: none; }
}

/* Safe Area */
@supports (padding: max(0px)) {
    .bottom-nav {
        padding-left: max(var(--spacing-md), env(safe-area-inset-left));
        padding-right: max(var(--spacing-md), env(safe-area-inset-right));
    }
}