* { box-sizing: border-box; margin: 0; padding: 0; }
        
        :root {
            --header-height: 56px;
            /* Accent colors */
            --pink-primary: #ec4899;
            --purple-primary: #a855f7;
            --violet-primary: #8b5cf6;
            --cyan-accent: #06b6d4;
        }

        /* Dark theme (default) */
        [data-theme="dark"] {
            --bg-primary: linear-gradient(135deg, #0f0f1a 0%, #1a1025 50%, #0d1117 100%);
            --bg-solid: #0f0f1a;
            --text-primary: #ffffff;
            --text-secondary: rgba(255,255,255,0.6);
            --text-tertiary: rgba(255,255,255,0.4);
            --text-muted: rgba(255,255,255,0.35);
            --lg-bg: rgba(255, 255, 255, 0.08);
            --lg-border: rgba(255, 255, 255, 0.18);
            --lg-blur: 24px;
            --lg-specular: inset 0 1px 0 rgba(255, 255, 255, 0.25), inset 0 -1px 0 rgba(255, 255, 255, 0.05);
            --lg-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-border: rgba(255, 255, 255, 0.06);
            --glass-blur: 20px;
            --card-bg: rgba(255,255,255,0.04);
            --card-border: rgba(255,255,255,0.06);
            --card-hover-bg: rgba(255,255,255,0.07);
            --card-hover-border: rgba(255,255,255,0.1);
            --overlay-bg: rgba(0,0,0,0.8);
            --modal-bg: rgba(20,15,30,0.95);
            --input-bg: rgba(255,255,255,0.03);
            --input-border: rgba(255,255,255,0.08);
            --tag-bg: rgba(255,255,255,0.08);
            --tag-color: rgba(255,255,255,0.5);
            /* Bubbles */
            --bubble-tutor-bg: rgba(255,255,255,0.04);
            --bubble-tutor-border: rgba(255,255,255,0.06);
            --bubble-tutor-shadow: 0 4px 20px rgba(0,0,0,0.25);
            --bubble-user-bg: transparent;
            --bubble-user-border: rgba(236,72,153,0.25);
            --bubble-user-border-style: dashed;
            --bubble-user-shadow: none;
            /* Speak button */
            --btn-speak-bg: linear-gradient(135deg, rgba(236,72,153,0.3) 0%, rgba(168,85,247,0.3) 100%);
            --btn-speak-border: rgba(236,72,153,0.25);
            --btn-speak-shadow: 0 4px 20px rgba(236,72,153,0.15);
            --btn-speak-color: #ffffff;
            --btn-speak-icon: #ffffff;
        }

        /* Light theme */
        [data-theme="light"] {
            --bg-primary: linear-gradient(135deg, #e8eaf2 0%, #dde0ec 50%, #e0e3ef 100%);
            --bg-solid: #f8f9fc;
            --text-primary: #1a1a2e;
            --text-secondary: rgba(26,26,46,0.6);
            --text-tertiary: rgba(26,26,46,0.45);
            --text-muted: rgba(26,26,46,0.35);
            --lg-bg: rgba(255, 255, 255, 0.7);
            --lg-border: rgba(0, 0, 0, 0.08);
            --lg-blur: 24px;
            --lg-specular: inset 0 1px 0 rgba(255, 255, 255, 0.8), inset 0 -1px 0 rgba(0, 0, 0, 0.03);
            --lg-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            --glass-bg: rgba(255, 255, 255, 0.6);
            --glass-border: rgba(0, 0, 0, 0.06);
            --glass-blur: 20px;
            --card-bg: rgba(255,255,255,0.7);
            --card-border: rgba(0,0,0,0.06);
            --card-hover-bg: rgba(255,255,255,0.85);
            --card-hover-border: rgba(0,0,0,0.1);
            --overlay-bg: rgba(0,0,0,0.3);
            --modal-bg: rgba(255,255,255,0.95);
            --input-bg: rgba(0,0,0,0.03);
            --input-border: rgba(0,0,0,0.08);
            --tag-bg: rgba(0,0,0,0.05);
            --tag-color: rgba(0,0,0,0.5);
            /* Bubbles */
            --bubble-tutor-bg: rgba(255,255,255,0.75);
            --bubble-tutor-border: rgba(0,0,0,0.06);
            --bubble-tutor-shadow: 0 2px 12px rgba(0,0,0,0.06);
            --bubble-user-bg: transparent;
            --bubble-user-border: rgba(236,72,153,0.2);
            --bubble-user-border-style: dashed;
            --bubble-user-shadow: none;
            /* Speak button */
            --btn-speak-bg: linear-gradient(135deg, rgba(236,72,153,0.15) 0%, rgba(168,85,247,0.15) 100%);
            --btn-speak-border: rgba(236,72,153,0.2);
            --btn-speak-shadow: 0 2px 12px rgba(236,72,153,0.1);
            --btn-speak-color: #1a1a2e;
            --btn-speak-icon: #ec4899;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
            background: var(--bg-primary);
            height: 100dvh;
            display: flex;
            flex-direction: column;
            color: var(--text-primary);
            overflow: hidden;
        }

        /* Home page: scrollable, no fixed height constraint */
        body.home-page {
            height: auto;
            min-height: 100dvh;
            overflow: auto;
        }

        /* Wide screen centering */
        @media (min-width: 600px) {
            body {
                justify-content: center;
                align-items: center;
            }
            body > .header,
            body > .chat-area,
            body > .bottom-bar {
                width: 70%;
                max-width: 640px;
            }
            .history-modal .history-content {
                width: 70%;
                max-width: 640px;
            }
        }        
        /* Header - Lightweight, matches home header */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 20px;
            height: var(--header-height);
            flex-shrink: 0;
            background: transparent;
        }
        
        .close-btn {
            background: none;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            color: var(--text-tertiary);
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .close-btn:hover {
            color: var(--text-primary);
        }
        
        .header-center {
            display: flex;
            align-items: center;
            gap: 10px;
            flex: 1;
            margin: 0 12px;
            min-width: 0;
        }
        
        .header-title {
            font-size: 15px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .header-title .brand { color: var(--text-tertiary); font-weight: 500; font-size: 14px; }
        .header-title .sep { color: var(--text-muted); font-weight: 300; }
        .header-title .lesson { color: var(--text-primary); font-weight: 600; font-size: 15px; }
        
        .timer {
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: 13px;
            color: var(--text-tertiary);
            white-space: nowrap;
            margin-left: auto;
            flex-shrink: 0;
        }
        .timer .dot {
            width: 6px;
            height: 6px;
            background: #ef4444;
            border-radius: 50%;
            animation: pulse 1s infinite;
            box-shadow: 0 0 6px rgba(239, 68, 68, 0.5);
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }
        
        .history-btn {
            background: none;
            border: none;
            color: var(--text-tertiary);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            font-size: 20px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .history-btn:hover { 
            color: var(--text-primary);
        }
        
        /* Main chat area */
        .chat-area {
            flex: 1;
            min-height: 0;
            display: flex;
            flex-direction: column;
            padding: 8px 16px;
            overflow-y: auto;
            justify-content: center;
            gap: 10px;
        }
        
        /* Tutor message bubble - Glass */
        .message-tutor {
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }
        
        .tutor-icon-area {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            width: 44px;
            flex-shrink: 0;
        }
        
        .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
            position: relative;
            transition: transform 0.1s ease-out, box-shadow 0.1s ease-out, background 0.1s ease-out;
            --audio-level: 0;
        }
        
        /* Pulsing animation for speaking */
        .avatar.speaking {
            background: rgba(139, 92, 246, 0.2);
            border-color: rgba(139, 92, 246, 0.4);
            box-shadow: 
                0 4px 16px rgba(139, 92, 246, 0.3),
                0 0 calc(var(--audio-level) * 25px + 5px) rgba(139, 92, 246, calc(var(--audio-level) * 0.6 + 0.2)),
                0 0 calc(var(--audio-level) * 40px + 10px) rgba(167, 139, 250, calc(var(--audio-level) * 0.4)),
                inset 0 0 20px rgba(139, 92, 246, 0.1);
        }
        
        /* Concentric rings - ring 1 */
        .avatar.speaking::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 100%;
            height: 100%;
            border-radius: 50%;
            border: 2px solid rgba(167, 139, 250, 0.6);
            transform: translate(-50%, -50%) scale(1);
            animation: pulse-ring 1.5s ease-out infinite;
            pointer-events: none;
        }
        
        /* Concentric rings - ring 2 */
        .avatar.speaking::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 100%;
            height: 100%;
            border-radius: 50%;
            border: 2px solid rgba(139, 92, 246, 0.5);
            transform: translate(-50%, -50%) scale(1);
            animation: pulse-ring 1.5s ease-out infinite 0.5s;
            pointer-events: none;
        }
        
        @keyframes pulse-ring {
            0% {
                transform: translate(-50%, -50%) scale(1);
                opacity: 0.8;
            }
            100% {
                transform: translate(-50%, -50%) scale(1.8);
                opacity: 0;
            }
        }
        
        /* Tutor visualizer under avatar - HIDDEN */
        .tutor-visualizer {
            display: none !important;
        }
        .tutor-visualizer.active {
            display: none !important;
        }
        .tutor-visualizer .bar {
            display: none;
            border-radius: 2px;
            box-shadow: 
                0 0 4px rgba(0, 245, 212, 0.7),
                0 0 8px rgba(0, 187, 249, 0.5);
            transition: height 0.06s ease-out;
        }
        
        .bubble-tutor {
            background: var(--bubble-tutor-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--bubble-tutor-border);
            border-radius: 4px 24px 24px 24px;
            padding: 16px 20px;
            min-height: 70px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
            box-shadow: var(--bubble-tutor-shadow);
        }
        
        .tutor-speech {
            font-size: 22px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        
        /* Hot text animation for streaming transcript */
        .tutor-speech .stable-text {
            color: var(--text-primary);
        }
        .tutor-speech .hot-text {
            color: #f97316; /* orange-500 - hot */
            transition: color 0.6s ease-out;
        }
        .tutor-speech .hot-text.cooling {
            color: var(--text-primary);
        }
        
        .tutor-translation {
            font-size: 14px;
            color: var(--text-secondary);
            font-style: italic;
            line-height: 1.4;
        }
        
        /* User reply bubble (dashed border) */
        .message-user {
            display: flex;
            flex-direction: column;
            gap: 10px;
            opacity: 0;
            transform: translateY(10px);
            transition: opacity 0.3s, transform 0.3s;
        }
        .message-user.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .message-user-content {
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }
        
        .user-icon-area {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            width: 44px;
            flex-shrink: 0;
        }
        
        .mic-icon-circle {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            position: relative;
            transition: transform 0.1s ease-out, box-shadow 0.1s ease-out, background 0.1s ease-out;
            --audio-level: 0;
        }
        
        /* Pulsing animation for speaking */
        .mic-icon-circle.speaking {
            background: rgba(236, 72, 153, 0.2);
            border-color: rgba(236, 72, 153, 0.4);
            box-shadow: 
                0 4px 16px rgba(236, 72, 153, 0.3),
                0 0 calc(var(--audio-level) * 25px + 5px) rgba(236, 72, 153, calc(var(--audio-level) * 0.6 + 0.2)),
                0 0 calc(var(--audio-level) * 40px + 10px) rgba(168, 85, 247, calc(var(--audio-level) * 0.4)),
                inset 0 0 20px rgba(236, 72, 153, 0.1);
        }
        
        /* Concentric rings - ring 1 */
        .mic-icon-circle.speaking::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 100%;
            height: 100%;
            border-radius: 50%;
            border: 2px solid rgba(236, 72, 153, 0.6);
            transform: translate(-50%, -50%) scale(1);
            animation: pulse-ring-user 1.5s ease-out infinite;
            pointer-events: none;
        }
        
        /* Concentric rings - ring 2 */
        .mic-icon-circle.speaking::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 100%;
            height: 100%;
            border-radius: 50%;
            border: 2px solid rgba(168, 85, 247, 0.5);
            transform: translate(-50%, -50%) scale(1);
            animation: pulse-ring-user 1.5s ease-out infinite 0.5s;
            pointer-events: none;
        }
        
        @keyframes pulse-ring-user {
            0% {
                transform: translate(-50%, -50%) scale(1);
                opacity: 0.8;
            }
            100% {
                transform: translate(-50%, -50%) scale(1.8);
                opacity: 0;
            }
        }
        
        /* User visualizer under mic icon - HIDDEN */
        .user-visualizer {
            display: none !important;
        }
        .user-visualizer.active {
            display: none !important;
        }
        .user-visualizer .bar {
            display: none;
        }
        
        .bubble-user {
            border: 1px var(--bubble-user-border-style, dashed) var(--bubble-user-border);
            border-radius: 4px 24px 24px 24px;
            padding: 16px 20px;
            min-height: 60px;
            background: var(--bubble-user-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
            box-shadow: var(--bubble-user-shadow);
        }
        
        .user-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 4px 0 56px;
        }
        
        .user-footer-text {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        
        .user-label {
            font-size: 12px;
            color: var(--text-tertiary);
            font-weight: 500;
        }
        
        .user-hint {
            font-size: 11px;
            color: var(--text-muted);
            font-style: italic;
        }
        
        .skip-btn {
            background: var(--lg-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--lg-border);
            color: var(--text-secondary);
            font-size: 12px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: 14px;
            cursor: pointer;
            letter-spacing: 0.5px;
            transition: all 0.3s ease;
            box-shadow: var(--lg-specular);
        }
        .skip-btn:hover { 
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.25);
            color: var(--text-primary);
            transform: scale(1.02);
        }
        
        .prompt-greek {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.3;
            color: var(--text-primary);
        }
        
        .prompt-russian {
            font-size: 13px;
            color: var(--text-secondary);
            font-style: italic;
        }
        
        /* Bottom bar - transparent, unified with chat background */
        .bottom-bar {
            background: transparent;
            padding: 6px 20px calc(env(safe-area-inset-bottom, 20px) + 24px);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }
        
        .controls-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .auto-mic {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 11px;
            color: var(--text-tertiary);
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        
        .auto-mic input[type="checkbox"] {
            width: 44px;
            height: 24px;
            appearance: none;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--lg-border);
            border-radius: 12px;
            position: relative;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: var(--lg-specular);
        }
        .auto-mic input[type="checkbox"]::after {
            content: '';
            position: absolute;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: white;
            top: 2px;
            left: 3px;
            transition: all 0.3s ease;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }
        .auto-mic input[type="checkbox"]:checked {
            background: linear-gradient(135deg, var(--pink-primary) 0%, var(--purple-primary) 100%);
            border-color: transparent;
        }
        .auto-mic input[type="checkbox"]:checked::after {
            left: 22px;
        }
        
        /* Hold to speak button */
        .speak-btn {
            width: 100%;
            padding: 32px 18px;
            border: 1px solid var(--btn-speak-border);
            border-radius: 20px;
            background: var(--btn-speak-bg);
            color: var(--btn-speak-color);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            transition: all 0.2s ease;
            box-shadow: var(--btn-speak-shadow);
            user-select: none;
            -webkit-user-select: none;
            touch-action: none;
            --audio-level: 0;
            font-family: inherit;
        }
        .speak-btn:active, .speak-btn.pressed {
            transform: scale(0.98);
            box-shadow: var(--btn-speak-shadow);
        }
        /* PTT mode listening - pink/purple gradient with audio-based animation */
        .speak-btn.listening {
            color: #ffffff;
            background: linear-gradient(135deg, 
                rgba(236, 72, 153, calc(var(--audio-level) * 0.4 + 0.5)) 0%, 
                rgba(168, 85, 247, calc(var(--audio-level) * 0.4 + 0.5)) 100%);
            border-color: rgba(236, 72, 153, 0.5);
            box-shadow: 
                0 0 calc(var(--audio-level) * 40px + 8px) rgba(236, 72, 153, calc(var(--audio-level) * 0.5 + 0.2)),
                inset 0 0 calc(var(--audio-level) * 20px + 4px) rgba(255, 255, 255, calc(var(--audio-level) * 0.1));
        }
        .speak-btn .mic-icon {
            display: flex;
            align-items: center;
        }
        .speak-btn .mic-icon svg {
            width: 20px;
            height: 20px;
            stroke: var(--btn-speak-icon);
            fill: none;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
            transition: stroke 0.2s;
        }
        .speak-btn.listening .mic-icon svg,
        .speak-btn.pressed .mic-icon svg {
            stroke: #ffffff;
        }
        
        /* Auto-mic mode - thin indicator bar */
        .speak-btn.auto-mic-mode {
            padding: 14px 18px;
            border-radius: 14px;
            background: var(--glass-bg);
            border-color: var(--glass-border);
            box-shadow: none;
            cursor: default;
            pointer-events: none;
        }
        .speak-btn.auto-mic-mode.paused {
            cursor: pointer;
            pointer-events: auto;
        }
        .speak-btn.auto-mic-mode.listening {
            background: linear-gradient(135deg, 
                rgba(236, 72, 153, calc(var(--audio-level) * 0.4 + 0.4)) 0%, 
                rgba(168, 85, 247, calc(var(--audio-level) * 0.4 + 0.4)) 100%);
            border-color: rgba(236, 72, 153, 0.4);
            box-shadow: 0 0 calc(var(--audio-level) * 25px + 4px) rgba(236, 72, 153, calc(var(--audio-level) * 0.4 + 0.1));
        }
        .speak-btn.auto-mic-mode .mic-icon {
            font-size: 16px;
        }
        
        /* Home screen (own page, normal flow) */
        .home-screen {
            width: 100%;
            max-width: 640px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            min-height: 100dvh;
        }
        @media (min-width: 600px) {
            .home-screen {
                width: 70%;
            }
        }
        @media (max-width: 599px) {
            .home-screen {
                max-width: 100%;
            }
        }
        
        /* Home Header */
        .home-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 20px;
            flex-shrink: 0;
        }
        .home-logo {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo-icon { font-size: 24px; }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .logo-dot { color: var(--pink-primary); }
        .home-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--lg-bg);
            border: 1.5px solid var(--lg-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            overflow: hidden;
            box-shadow: var(--lg-specular), 0 2px 8px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: all 0.2s;
            position: relative;
        }
        .home-avatar:hover {
            border-color: var(--cyan-accent);
            box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.2);
        }

        /* Back button (freetalk page) */
        .back-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--lg-bg);
            border: 1.5px solid var(--lg-border);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: var(--text-secondary);
            transition: all 0.2s;
        }
        .back-btn:hover {
            border-color: var(--cyan-accent);
            color: var(--text-primary);
        }

        /* Profile dropdown menu */
        .profile-dropdown {
            position: absolute;
            top: 60px;
            right: 20px;
            width: 220px;
            background: var(--modal-bg);
            backdrop-filter: blur(var(--lg-blur));
            -webkit-backdrop-filter: blur(var(--lg-blur));
            border: 1px solid var(--lg-border);
            border-radius: 16px;
            padding: 8px;
            z-index: 200;
            box-shadow: 0 16px 48px rgba(0,0,0,0.25);
            display: none;
        }
        .profile-dropdown.visible { display: block; }
        .profile-dropdown-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: 10px;
            border: none;
            background: none;
            color: var(--text-primary);
            font-size: 14px;
            font-weight: 500;
            width: 100%;
            cursor: pointer;
            transition: background 0.2s;
            font-family: inherit;
        }
        .profile-dropdown-item:hover {
            background: var(--card-bg);
        }
        .profile-dropdown-item svg {
            width: 18px;
            height: 18px;
            stroke: var(--text-tertiary);
            fill: none;
            stroke-width: 2;
            flex-shrink: 0;
        }
        .profile-dropdown-divider {
            height: 1px;
            background: var(--card-border);
            margin: 4px 8px;
        }

        /* Home Content (scrollable) */
        .home-content {
            flex: 1;
            overflow-y: auto;
            padding: 0 20px 32px;
            -webkit-overflow-scrolling: touch;
        }
        .home-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .home-title .accent { color: var(--cyan-accent); }
        .home-subtitle {
            font-size: 14px;
            color: var(--text-tertiary);
            margin-bottom: 20px;
            font-weight: 400;
        }

        /* Difficulty Filter */
        .difficulty-filter {
            display: flex;
            gap: 8px;
            margin-bottom: 20px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .diff-btn {
            padding: 10px 20px;
            border-radius: 24px;
            border: 1px solid var(--card-border);
            background: var(--card-bg);
            color: var(--text-tertiary);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            white-space: nowrap;
            transition: all 0.3s;
            font-family: inherit;
        }
        .diff-btn.active {
            background: var(--lg-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-color: var(--lg-border);
            color: var(--text-primary);
            box-shadow: var(--lg-specular), 0 4px 16px rgba(6, 182, 212, 0.15);
        }
        .diff-btn-free.active {
            border-color: rgba(168, 85, 247, 0.4);
            box-shadow: 0 0 0 1px rgba(168, 85, 247, 0.15), 0 4px 16px rgba(168, 85, 247, 0.15);
        }

        /* Free Talk Banner */
        .freetalk-banner {
            grid-column: 1 / -1;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 20px;
            margin-bottom: 16px;
            border-radius: 18px;
            border: 1px solid var(--card-border);
            background: var(--card-bg);
            cursor: pointer;
            transition: all 0.3s;
            font-family: inherit;
            color: var(--text-primary);
            text-align: left;
            width: 100%;
        }
        .freetalk-banner:hover {
            border-color: var(--card-hover-border);
            background: var(--card-hover-bg);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(0,0,0,0.08);
        }
        .freetalk-banner-icon {
            font-size: 28px;
            flex-shrink: 0;
        }
        .freetalk-banner-text {
            flex: 1;
            min-width: 0;
        }
        .freetalk-banner-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .freetalk-banner-desc {
            font-size: 12px;
            color: var(--text-tertiary);
            margin-top: 2px;
        }
        .freetalk-banner-arrow {
            font-size: 18px;
            color: var(--text-tertiary);
            flex-shrink: 0;
        }

        /* Free conversation card accent */
        .free-card {
            border-color: rgba(168, 85, 247, 0.2);
        }
        .free-card:hover {
            border-color: rgba(168, 85, 247, 0.4);
        }

        /* End conversation button (free mode) */
        .end-conversation-btn {
            padding: 8px 18px;
            border-radius: 20px;
            border: 1px solid rgba(239, 68, 68, 0.3);
            background: rgba(239, 68, 68, 0.1);
            color: #f87171;
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            font-family: inherit;
            transition: all 0.2s;
        }
        .end-conversation-btn:hover {
            background: rgba(239, 68, 68, 0.2);
            border-color: rgba(239, 68, 68, 0.5);
        }
        .end-conversation-btn.hidden {
            display: none;
        }

        /* Featured Card */
        .featured-card {
            background: var(--glass-bg);
            backdrop-filter: blur(var(--lg-blur));
            -webkit-backdrop-filter: blur(var(--lg-blur));
            border: 1px solid var(--card-border);
            border-radius: 20px;
            padding: 24px;
            margin-bottom: 28px;
            position: relative;
            overflow: hidden;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: var(--lg-specular), var(--lg-shadow);
        }
        .featured-card:hover {
            transform: translateY(-2px);
            border-color: var(--card-hover-border);
            background: var(--card-hover-bg);
        }
        .featured-badge {
            font-size: 11px;
            font-weight: 700;
            color: var(--pink-primary);
            letter-spacing: 1px;
            margin-bottom: 8px;
        }
        .featured-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .featured-desc {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .featured-meta {
            font-size: 12px;
            color: var(--text-tertiary);
        }
        .featured-mic {
            position: absolute;
            right: 24px;
            top: 50%;
            transform: translateY(-50%);
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #818cf8 0%, #a78bfa 50%, #c084fc 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            box-shadow: 0 4px 20px rgba(129, 140, 248, 0.3);
        }

        /* Section Headers */
        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 14px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .view-all-link {
            background: none;
            border: none;
            color: var(--cyan-accent);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
        }
        .back-link {
            background: none;
            border: none;
            color: var(--cyan-accent);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
        }

        /* Sub-sections */
        .sub-section { margin-top: 8px; }
        .sub-section.hidden { display: none; }

        /* Lesson/Topic/Pack Grid */
        .lesson-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .lesson-card, .topic-card, .pack-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 18px;
            padding: 18px 16px;
            text-align: left;
            cursor: pointer;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            gap: 6px;
            color: var(--text-primary);
            font-family: inherit;
        }
        .lesson-card:hover, .topic-card:hover, .pack-card:hover {
            transform: translateY(-2px);
            border-color: var(--card-hover-border);
            background: var(--card-hover-bg);
            box-shadow: 0 4px 16px rgba(0,0,0,0.08);
        }
        .card-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 6px;
        }
        .card-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .card-desc {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.3;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 4px;
        }
        .tag {
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 8px;
            background: var(--tag-bg);
            color: var(--tag-color);
        }
        .tag.a1 { background: rgba(6, 182, 212, 0.12); color: #22d3ee; }
        .tag.a2 { background: rgba(34, 197, 94, 0.12); color: #4ade80; }
        .tag.b1 { background: rgba(234, 179, 8, 0.12); color: #facc15; }
        .tag.free { background: rgba(168, 85, 247, 0.12); color: #c084fc; }
        .time {
            font-size: 11px;
            color: var(--text-tertiary);
        }

        /* Custom Words */
        .custom-words-input {
            margin-top: 16px;
        }
        .custom-words-input.hidden { display: none; }
        .custom-words-input textarea {
            width: 100%;
            height: 120px;
            background: var(--input-bg);
            border: 1px solid var(--input-border);
            border-radius: 16px;
            padding: 14px;
            color: var(--text-primary);
            font-size: 14px;
            font-family: inherit;
            resize: none;
            outline: none;
            transition: border-color 0.3s;
        }
        .custom-words-input textarea:focus {
            border-color: var(--cyan-accent);
            box-shadow: 0 0 0 1px rgba(6, 182, 212, 0.2);
        }
        .start-custom-btn {
            width: 100%;
            margin-top: 10px;
            padding: 14px;
            border-radius: 14px;
            border: none;
            background: linear-gradient(135deg, var(--pink-primary), var(--purple-primary));
            color: white;
            font-size: 14px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
        }
        .start-custom-btn:hover { transform: scale(1.02); }

        /* Bottom Navigation - removed, profile dropdown used instead */
        
        /* History modal - Glass */
        .history-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--overlay-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            z-index: 1000;
            overflow-y: auto;
            padding: 20px;
        }
        .history-modal.visible { display: block; }
        
        .history-content {
            max-width: 500px;
            margin: 0 auto;
            background: var(--modal-bg);
            backdrop-filter: blur(var(--lg-blur));
            -webkit-backdrop-filter: blur(var(--lg-blur));
            border: 1px solid var(--lg-border);
            border-radius: 24px;
            padding: 20px;
            max-height: 90vh;
            overflow-y: auto;
            box-shadow: var(--lg-specular), 0 16px 48px rgba(0, 0, 0, 0.15);
        }
        
        .history-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--glass-border);
        }
        .history-header h2 { 
            color: var(--text-primary); 
            font-size: 18px;
            margin: 0; 
        }
        .history-close {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            color: var(--text-primary);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            font-size: 18px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .history-close:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: scale(1.05);
        }
        
        .history-item {
            margin-bottom: 12px;
            padding: 14px 18px;
            border-radius: 16px;
            max-width: 85%;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .history-item.tutor {
            background: rgba(139, 92, 246, 0.15);
            border: 1px solid rgba(139, 92, 246, 0.25);
            margin-right: auto;
            border-bottom-left-radius: 4px;
        }
        .history-item.prompt {
            background: rgba(236, 72, 153, 0.15);
            border: 1px solid rgba(236, 72, 153, 0.25);
            margin-left: auto;
            border-bottom-right-radius: 4px;
        }
        .history-item .greek {
            font-size: 15px;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .history-item .russian {
            font-size: 13px;
            color: var(--text-secondary);
        }
        
        /* Debug console - Floating overlay */
        .debug-panel {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(0, 0, 0, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(6, 182, 212, 0.3);
            z-index: 2000;
            display: none;
            flex-direction: column;
            max-height: 50vh;
        }
        .debug-panel.visible { display: flex; }
        .debug-toolbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 6px 12px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            flex-shrink: 0;
        }
        .debug-toolbar-title {
            color: #06b6d4;
            font-size: 12px;
            font-weight: 700;
            font-family: 'SF Mono', Monaco, monospace;
        }
        .debug-toolbar-btns {
            display: flex;
            gap: 8px;
        }
        .debug-toolbar-btn {
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.15);
            color: #06b6d4;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 6px;
            cursor: pointer;
            font-family: 'SF Mono', Monaco, monospace;
        }
        .debug-toolbar-btn:hover { background: rgba(255,255,255,0.2); }
        .debug-log {
            color: #06b6d4;
            font-family: 'SF Mono', Monaco, monospace;
            font-size: 10px;
            overflow-y: auto;
            padding: 8px;
            flex: 1;
            -webkit-overflow-scrolling: touch;
        }
        .debug-log .log-warn { color: #facc15; }
        .debug-log .log-err { color: #f87171; }
        .debug-log .log-ok { color: #4ade80; }
        .debug-log .log-audio { color: #a78bfa; }
        .debug-toggle-btn {
            position: fixed;
            bottom: 8px;
            right: 8px;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(0,0,0,0.6);
            border: 1px solid rgba(6,182,212,0.3);
            color: #06b6d4;
            font-size: 16px;
            cursor: pointer;
            z-index: 2001;
            display: flex;
            align-items: center;
            justify-content: center;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            transition: all 0.2s;
        }
        .debug-toggle-btn:hover { background: rgba(0,0,0,0.8); transform: scale(1.1); }
        .debug-panel.visible ~ .debug-toggle-btn { bottom: calc(50vh + 8px); }

        /* ============ PROFILE MODAL ============ */
        .profile-modal {
            position: fixed;
            inset: 0;
            z-index: 500;
            display: none;
            align-items: center;
            justify-content: center;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }
        .profile-modal.visible { display: flex; }

        .profile-modal-content {
            width: 90%;
            max-width: 420px;
            max-height: 85vh;
            overflow-y: auto;
            background: var(--modal-bg);
            backdrop-filter: blur(var(--lg-blur));
            -webkit-backdrop-filter: blur(var(--lg-blur));
            border: 1px solid var(--lg-border);
            border-radius: 20px;
            padding: 24px;
            box-shadow: 0 24px 64px rgba(0,0,0,0.3);
        }

        .profile-modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }
        .profile-modal-header h2 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
        }
        .profile-modal-close {
            width: 32px;
            height: 32px;
            border: none;
            background: var(--card-bg);
            border-radius: 50%;
            color: var(--text-tertiary);
            font-size: 16px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
        }
        .profile-modal-close:hover {
            background: var(--card-border);
            color: var(--text-primary);
        }

        .profile-section {
            margin-bottom: 20px;
        }
        .profile-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }

        .profile-name-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 6px;
        }
        .profile-name-btn {
            padding: 10px 12px;
            border: 1.5px solid var(--card-border);
            border-radius: 10px;
            background: var(--card-bg);
            color: var(--text-primary);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            text-align: left;
            font-family: inherit;
        }
        .profile-name-btn .name-gender {
            font-size: 11px;
            color: var(--text-tertiary);
            margin-left: 4px;
        }
        .profile-name-btn:hover {
            border-color: var(--cyan-accent);
            background: rgba(6, 182, 212, 0.05);
        }
        .profile-name-btn.selected {
            border-color: var(--cyan-accent);
            background: rgba(6, 182, 212, 0.12);
            box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.15);
        }

        .profile-country-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 6px;
        }
        .profile-country-btn {
            padding: 10px 12px;
            border: 1.5px solid var(--card-border);
            border-radius: 10px;
            background: var(--card-bg);
            color: var(--text-primary);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            text-align: left;
            font-family: inherit;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .profile-country-btn .country-flag {
            font-size: 18px;
        }
        .profile-country-btn:hover {
            border-color: var(--cyan-accent);
            background: rgba(6, 182, 212, 0.05);
        }
        .profile-country-btn.selected {
            border-color: var(--cyan-accent);
            background: rgba(6, 182, 212, 0.12);
            box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.15);
        }

        .profile-summary {
            padding: 14px 16px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 12px;
            margin-bottom: 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
            min-height: 44px;
        }
        .profile-summary .summary-label {
            font-size: 12px;
            color: var(--text-tertiary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.3px;
            margin-bottom: 4px;
        }
        .profile-summary .summary-text {
            color: var(--text-primary);
            font-weight: 500;
        }

        .profile-save-btn {
            width: 100%;
            padding: 14px;
            border: none;
            border-radius: 12px;
            background: linear-gradient(135deg, #06b6d4, #0891b2);
            color: white;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            font-family: inherit;
        }
        .profile-save-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(6, 182, 212, 0.3);
        }
        .profile-save-btn:active {
            transform: translateY(0);
        }
        .profile-save-btn:disabled {
            opacity: 0.4;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .profile-theme-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0;
            margin-bottom: 16px;
        }
        .profile-theme-row .profile-label {
            margin-bottom: 0;
        }
        .profile-theme-toggle {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border: 1px solid var(--card-border);
            border-radius: 10px;
            background: var(--card-bg);
            color: var(--text-secondary);
            font-size: 13px;
            font-family: inherit;
            cursor: pointer;
            transition: all 0.2s;
        }
        .profile-theme-toggle:hover {
            background: var(--hover-bg, rgba(255,255,255,0.05));
            color: var(--text-primary);
        }
        .profile-theme-toggle svg {
            flex-shrink: 0;
        }