:root {
    /* Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f5;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --accent-primary: #818cf8;
    --accent-secondary: #a78bfa;
    --border-color: #334155;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar.open {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-family: 'Playfair Display', serif;
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.close-sidebar {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

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

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    width: 100%;
    text-decoration: none;
}

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

.nav-icon {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 1024px) {
    .sidebar {
        position: relative;
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .close-sidebar {
        display: none;
    }
}

/* Top Bar */
.top-bar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .top-bar {
    background: rgba(15, 23, 42, 0.8);
}

.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 20px;
    color: var(--text-primary);
    transition: all 0.2s;
}

.menu-toggle:hover {
    background: var(--bg-tertiary);
}

.top-bar-title {
    flex: 1;
}

.top-bar-title h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

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

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

.action-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.action-icon:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Avatar Section */
.avatar-section {
    padding: 40px 24px;
    display: flex;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.avatar-container {
    position: relative;
}

.avatar-wrapper {
    width: 300px;
    height: 300px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--bg-secondary);
    box-shadow: var(--shadow-xl);
    position: relative;
    border: 3px solid var(--border-color);
}

.ready-player-me-avatar {
    width: 100%;
    height: 100%;
    border: none;
}

.fallback-avatar {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
}

.avatar-placeholder {
    color: white;
    opacity: 0.9;
}

.avatar-status {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-primary);
    padding: 8px 16px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    font-size: 14px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
    animation: pulse 2s infinite;
}

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

.avatar-status.speaking .status-indicator {
    background: var(--accent-primary);
    animation: pulse 1s infinite;
}

/* Avatar Speaking Animations */
.avatar-wrapper.speaking {
    animation: avatarFloat 2s ease-in-out infinite;
}

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

.fallback-avatar.avatar-speaking {
    animation: avatarPulse 1.5s ease-in-out infinite;
}

@keyframes avatarPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.fallback-avatar.avatar-speaking .avatar-placeholder path {
    transition: d 0.15s ease;
}

/* D-ID Avatar Video */
.did-avatar {
    border-radius: var(--radius-xl);
    background: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
}

.ready-player-me-avatar {
    width: 100%;
    height: 100%;
    border: none;
    border-radius: var(--radius-xl);
    background: var(--bg-secondary);
}

/* Chat Section */
.chat-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: 24px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 0;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.message {
    display: flex;
    gap: 12px;
    animation: fadeInUp 0.3s ease-out;
}

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

.message-avatar {
    flex-shrink: 0;
}

.mini-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
}

.message-content {
    flex: 1;
    background: var(--bg-secondary);
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.message-content p {
    color: var(--text-primary);
    font-size: 15px;
    line-height: 1.6;
}

.user-message {
    flex-direction: row-reverse;
}

.user-message .message-content {
    background: var(--accent-primary);
    color: white;
}

.user-message .message-content p {
    color: white;
}

.message-content.sucks {
    border-left: 4px solid #ef4444;
}

.message-content.doesnt-suck {
    border-left: 4px solid #10b981;
}

/* Input Container */
.input-container {
    position: sticky;
    bottom: 0;
    background: var(--bg-primary);
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.input-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.input-action-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.input-action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.input-wrapper {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 12px;
    transition: all 0.2s;
}

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

#issueInput {
    flex: 1;
    border: none;
    background: none;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    resize: none;
    max-height: 120px;
    outline: none;
}

#issueInput::placeholder {
    color: var(--text-tertiary);
}

.send-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-md);
    cursor: pointer;
    color: white;
    transition: all 0.2s;
    flex-shrink: 0;
}

.send-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

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

/* Stats Card */
.stats-card {
    display: flex;
    gap: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin: 24px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.3s ease-out;
}

.stat-item {
    flex: 1;
    text-align: center;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-divider {
    width: 1px;
    background: var(--border-color);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    animation: fadeIn 0.2s ease-out;
}

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

.modal {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease-out;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 24px;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 24px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

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

.modal-content {
    padding: 24px;
}

.settings-section {
    margin-bottom: 32px;
}

.settings-section h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.setting-group {
    margin-bottom: 20px;
}

.setting-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.setting-group input[type="text"],
.setting-group input[type="password"],
.setting-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.2s;
}

.setting-group input:focus,
.setting-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.setting-group input[type="range"] {
    width: 100%;
    margin-top: 8px;
}

.setting-group input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
}

.setting-group small {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-tertiary);
}

.setting-group small a {
    color: var(--accent-primary);
    text-decoration: none;
}

.setting-group small a:hover {
    text-decoration: underline;
}

/* History */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.history-item {
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
}

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

.history-issue {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.history-response {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 8px;
}

.history-meta {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 768px) {
    .avatar-wrapper {
        width: 250px;
        height: 250px;
    }
    
    .top-bar-title h1 {
        font-size: 20px;
    }
    
    .stats-card {
        flex-direction: column;
        gap: 16px;
    }
    
    .stat-divider {
        width: 100%;
        height: 1px;
    }
}

/* Loading States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 16px 20px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-tertiary);
    animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.7;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* Landing Page Styles */
.landing-page {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: 60px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.landing-header {
    text-align: center;
    margin-bottom: 60px;
    max-width: 800px;
}

.landing-title {
    font-family: 'Playfair Display', serif;
    font-size: 64px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    line-height: 1.2;
}

.landing-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    font-weight: 500;
}

.gurus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1200px;
    width: 100%;
    margin-bottom: 60px;
}

.guru-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 32px 24px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.guru-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--card-accent, var(--accent-primary)), var(--accent-secondary));
    transform: scaleX(0);
    transition: transform 0.3s;
}

.guru-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--card-accent, var(--accent-primary));
}

.guru-card:hover::before {
    transform: scaleX(1);
}

.guru-card.adult {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(220, 38, 38, 0.05));
    border-color: rgba(239, 68, 68, 0.3);
}

.guru-card.adult:hover {
    border-color: #ef4444;
    box-shadow: 0 20px 25px -5px rgba(239, 68, 68, 0.3);
}

.guru-card-icon {
    font-size: 64px;
    margin-bottom: 20px;
    text-align: center;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.guru-card-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    text-align: center;
}

.guru-card-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    text-align: center;
}

.guru-card-badge {
    display: inline-block;
    padding: 6px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 auto;
    display: block;
    width: fit-content;
    transition: all 0.2s;
}

.guru-card:hover .guru-card-badge {
    background: var(--card-accent, var(--accent-primary));
    color: white;
    border-color: var(--card-accent, var(--accent-primary));
}

.guru-card-badge.warning {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
    animation: pulse 2s infinite;
}

.guru-card.adult:hover .guru-card-badge.warning {
    background: #ef4444;
    color: white;
    border-color: #ef4444;
}

.landing-footer {
    text-align: center;
    margin-top: auto;
    padding-top: 40px;
    color: var(--text-tertiary);
    font-size: 14px;
}

@media (max-width: 768px) {
    .landing-title {
        font-size: 48px;
    }
    
    .gurus-grid {
        grid-template-columns: 1fr;
    }
    
    .guru-card {
        padding: 24px 20px;
    }
}