/* ==========================================================================
   돌림힘 (Torque) & 회전 평형 시뮬레이션 - Main Style Sheet (No Scroll Fit)
   ========================================================================== */

/* --- CSS Variables & Design System --- */
:root {
    /* Color Palette */
    --bg-dark: #090d16;
    --bg-card: rgba(17, 24, 39, 0.85);
    --bg-card-hover: rgba(30, 41, 59, 0.9);
    --bg-input: rgba(15, 23, 42, 0.8);
    --border-color: rgba(255, 255, 255, 0.12);
    --border-glow: rgba(56, 189, 248, 0.3);
    
    /* Brand & Accent Colors */
    --primary: #38bdf8;          /* Position vector r (Sky Blue) */
    --primary-glow: rgba(56, 189, 248, 0.4);
    --force-color: #ff5252;      /* Force vector F (Coral Red) */
    --force-glow: rgba(255, 82, 82, 0.4);
    --torque-color: #c084fc;     /* Torque tau (Violet/Purple) */
    --torque-glow: rgba(192, 132, 252, 0.4);
    --arm-color: #fbbf24;        /* Lever arm d (Amber Gold) */
    --success: #34d399;         /* Equilibrium / Success (Emerald) */
    --warning: #fb923c;         /* Warning / Unbalanced (Orange) */
    
    /* Text Colors */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    /* Fonts */
    --font-sans: 'Inter', 'Noto Sans KR', sans-serif;
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Shadows & Effects */
    --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 16px rgba(56, 189, 248, 0.15);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
    width: 100%;
    height: 100%;
    max-height: 100vh;
    overflow: hidden;
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
}

/* Background Ambient Glow */
body::before {
    content: '';
    position: fixed;
    top: -20%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.06) 0%, rgba(192, 132, 252, 0.04) 50%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    bottom: -20%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(255, 82, 82, 0.05) 0%, rgba(251, 191, 36, 0.03) 50%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* --- App Main Layout --- */
.app-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-height: 100vh;
    max-width: 1600px;
    margin: 0 auto;
    padding: 8px 12px;
    gap: 8px;
    box-sizing: border-box;
}

/* --- App Header --- */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 8px 16px;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
    gap: 10px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--primary);
    color: var(--primary);
}

.title-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.7); }
    70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(56, 189, 248, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0); }
}

.title-container h1 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Nav Tabs */
.nav-tabs {
    display: flex;
    align-items: center;
    background: rgba(15, 23, 42, 0.6);
    padding: 3px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
    gap: 3px;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tab-btn i {
    font-size: 0.9rem;
}

.tab-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    background: var(--primary);
    color: #0f172a;
    box-shadow: 0 2px 8px var(--primary-glow);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.principle-btn {
    background: linear-gradient(135deg, rgba(192, 132, 252, 0.2) 0%, rgba(56, 189, 248, 0.2) 100%);
    border-color: rgba(192, 132, 252, 0.4);
    color: var(--text-main);
}

.principle-btn:hover {
    background: linear-gradient(135deg, rgba(192, 132, 252, 0.35) 0%, rgba(56, 189, 248, 0.35) 100%);
    border-color: var(--torque-color);
    color: #fff;
}

/* --- Main Content & Tab Panes --- */
.main-content {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

.tab-pane {
    display: none;
    flex: 1;
    min-height: 0;
    animation: fadeIn 0.2s ease-out;
}

.tab-pane.active {
    display: flex;
    flex-direction: column;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Simulation Layout (Canvas + Sidebar) */
.simulation-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 10px;
    flex: 1;
    min-height: 0;
}

@media (max-width: 1024px) {
    .simulation-layout {
        grid-template-columns: 1fr;
    }
}

/* --- Canvas Wrapper --- */
.canvas-container-wrapper {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    flex: 1;
    min-height: 0;
}

.canvas-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
    background: rgba(15, 23, 42, 0.8);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    gap: 8px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 700;
    background: rgba(56, 189, 248, 0.15);
    color: var(--primary);
    border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge.success {
    background: rgba(52, 211, 153, 0.15);
    color: var(--success);
    border-color: rgba(52, 211, 153, 0.3);
}

.badge.warning {
    background: rgba(251, 146, 60, 0.15);
    color: var(--warning);
    border-color: rgba(251, 146, 60, 0.3);
}

.badge.purple {
    background: rgba(192, 132, 252, 0.15);
    color: var(--torque-color);
    border-color: rgba(192, 132, 252, 0.3);
}

.canvas-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.sm-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.sm-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

.sm-btn.active {
    background: rgba(56, 189, 248, 0.2);
    border-color: var(--primary);
    color: var(--primary);
}

/* Canvas Viewport */
.canvas-viewport {
    position: relative;
    flex: 1;
    min-height: 0;
    width: 100%;
    background: radial-gradient(circle at center, #111827 0%, #0b0f19 100%);
    cursor: default;
    overflow: hidden;
}

.canvas-viewport canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

/* Canvas Real-Time Data Chips */
.canvas-overlay-data {
    position: absolute;
    top: 10px;
    left: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    pointer-events: none;
    z-index: 5;
}

.data-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 4px 10px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-main);
    box-shadow: var(--shadow-sm);
}

.data-chip strong {
    font-family: var(--font-mono);
    font-size: 0.88rem;
}

.r-chip i { color: var(--primary); }
.f-chip i { color: var(--force-color); }
.t-chip i { color: var(--torque-color); }
.arm-chip i { color: var(--arm-color); }

.interactive-tip {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(15, 23, 42, 0.9);
    border-top: 1px solid var(--border-color);
    font-size: 0.78rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

.interactive-tip i {
    color: var(--primary);
}

/* --- Control Sidebar --- */
.control-sidebar {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding-right: 2px;
}

/* Control Cards */
.control-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
}

.card-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-main);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 6px;
}

.card-title i {
    color: var(--primary);
    margin-right: 4px;
}

/* Sliders & Controls */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.control-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.val-badge {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.82rem;
    color: var(--primary);
    background: rgba(56, 189, 248, 0.1);
    padding: 1px 6px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(56, 189, 248, 0.2);
}

.val-badge.red {
    color: var(--force-color);
    background: rgba(255, 82, 82, 0.1);
    border-color: rgba(255, 82, 82, 0.2);
}

.val-badge.purple {
    color: var(--torque-color);
    background: rgba(192, 132, 252, 0.1);
    border-color: rgba(192, 132, 252, 0.2);
}

.val-badge.gold {
    color: var(--arm-color);
    background: rgba(251, 191, 36, 0.1);
    border-color: rgba(251, 191, 36, 0.2);
}

.slider-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 5px;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    outline: none;
    border: 1px solid var(--border-color);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 8px var(--primary-glow);
    transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

/* Preset Buttons Grid */
.preset-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
}

.preset-btn {
    padding: 6px 8px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
}

.preset-btn:hover {
    background: rgba(56, 189, 248, 0.1);
    border-color: var(--primary);
    color: var(--text-main);
}

.preset-btn.active {
    background: rgba(56, 189, 248, 0.2);
    border-color: var(--primary);
    color: var(--primary);
}

/* Math Formula Breakdown Card */
.formula-card {
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(192, 132, 252, 0.3);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}

.formula-header {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--torque-color);
    display: flex;
    align-items: center;
    gap: 6px;
}

.formula-box {
    background: rgba(0, 0, 0, 0.4);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: #e2e8f0;
    line-height: 1.5;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.formula-box .highlight-r { color: var(--primary); font-weight: 700; }
.formula-box .highlight-f { color: var(--force-color); font-weight: 700; }
.formula-box .highlight-t { color: var(--torque-color); font-weight: 700; }
.formula-box .highlight-d { color: var(--arm-color); font-weight: 700; }

/* Interactive Weight Inventory Palette (For Seesaw tab) */
.weight-palette {
    display: flex;
    gap: 8px;
    justify-content: space-around;
    padding: 6px;
    background: rgba(15, 23, 42, 0.6);
    border-radius: var(--radius-sm);
    border: 1px dashed var(--border-color);
}

.weight-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: linear-gradient(145deg, #334155, #1e293b);
    border: 2px solid #475569;
    border-radius: var(--radius-sm);
    color: #fff;
    font-weight: 700;
    font-size: 0.78rem;
    cursor: grab;
    user-select: none;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.weight-item:hover {
    transform: translateY(-2px) scale(1.05);
    border-color: var(--primary);
    box-shadow: 0 4px 10px var(--primary-glow);
}

.weight-item.w-1 { border-color: #38bdf8; }
.weight-item.w-2 { border-color: #34d399; }
.weight-item.w-5 { border-color: #fb923c; }
.weight-item.w-10 { border-color: #f43f5e; }

.action-row {
    display: flex;
    gap: 6px;
}

.action-btn {
    flex: 1;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: var(--transition-fast);
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.12);
}

.action-btn.danger {
    background: rgba(244, 63, 94, 0.15);
    border-color: rgba(244, 63, 94, 0.3);
    color: #f43f5e;
}

.action-btn.danger:hover {
    background: rgba(244, 63, 94, 0.3);
}

.action-btn.active {
    background: rgba(56, 189, 248, 0.2);
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.2);
}

/* --- Modal Dialog (Principle Info) --- */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.modal-backdrop.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    width: 90%;
    max-width: 640px;
    max-height: 85vh;
    background: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: scale(0.95);
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-backdrop.open .modal-card {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 18px;
    background: rgba(30, 41, 59, 0.6);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.15s ease;
}

.close-btn:hover {
    color: #fff;
}

.modal-body {
    padding: 16px 18px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    color: #cbd5e1;
    font-size: 0.88rem;
    line-height: 1.5;
}

.info-block {
    background: rgba(255, 255, 255, 0.03);
    border-left: 3px solid var(--primary);
    padding: 10px 14px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.info-block h3 {
    font-size: 0.92rem;
    color: #f8fafc;
    margin-bottom: 4px;
}

.info-block code {
    font-family: var(--font-mono);
    color: var(--primary);
    background: rgba(56, 189, 248, 0.1);
    padding: 2px 5px;
    border-radius: 4px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

::-webkit-scrollbar-track {
    background: rgba(15, 23, 42, 0.5);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.18);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.35);
}

/* ==========================================================================
   Mobile & Tablet Responsive Design System
   ========================================================================== */
@media (max-width: 1024px) {
    html, body {
        overflow-y: auto !important;
        height: auto !important;
        max-height: none !important;
    }

    .app-container {
        height: auto !important;
        min-height: 100vh;
        padding-bottom: 24px;
    }

    .app-header {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        height: auto;
        padding: 10px 14px;
        gap: 8px;
        background: rgba(11, 15, 25, 0.95);
        border-bottom: 1px solid var(--border-color);
    }

    .header-left {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
    }

    .header-left .title-container h1 {
        font-size: 1.05rem;
        font-weight: 800;
    }

    .nav-tabs {
        display: flex;
        width: 100%;
        gap: 4px;
        background: rgba(255, 255, 255, 0.04);
        padding: 3px;
        border-radius: 12px;
        border: 1px solid var(--border-color);
    }

    .tab-btn {
        flex: 1;
        padding: 8px 6px;
        font-size: 0.8rem;
        font-weight: 700;
        justify-content: center;
        border-radius: 8px;
    }

    .header-right {
        width: 100%;
    }

    .principle-btn {
        width: 100%;
        justify-content: center;
        padding: 9px 12px;
        font-size: 0.85rem;
        font-weight: 700;
        border-radius: 10px;
        background: linear-gradient(135deg, rgba(168, 85, 247, 0.25) 0%, rgba(56, 189, 248, 0.25) 100%);
        border: 1px solid rgba(168, 85, 247, 0.4);
        color: #E9D5FF;
        box-shadow: 0 0 10px rgba(168, 85, 247, 0.15);
    }

    .simulation-layout {
        grid-template-columns: 1fr !important;
        gap: 12px;
        padding: 10px 12px;
    }

    .canvas-container-wrapper {
        min-height: 380px;
        height: 420px;
        border-radius: 16px;
    }

    .canvas-overlay-data {
        display: none !important;
    }

    .canvas-header {
        padding: 10px 12px;
    }

    .status-indicator {
        flex-wrap: wrap;
        gap: 6px;
    }

    .badge {
        font-size: 0.76rem;
        padding: 3px 8px;
        border-radius: 12px;
    }

    .control-sidebar {
        width: 100% !important;
        max-height: none;
        overflow-y: visible;
    }

    .weight-palette {
        gap: 8px;
        padding: 8px;
    }

    .weight-item {
        width: 48px;
        height: 48px;
        font-size: 0.85rem;
    }

    .action-btn {
        padding: 10px 12px;
        font-size: 0.85rem;
        min-height: 44px;
    }
}

@media (max-width: 600px) {
    .app-header {
        padding: 8px 10px;
        gap: 6px;
    }

    .header-left {
        gap: 6px;
    }

    .header-left .title-container h1 {
        font-size: 0.88rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .back-btn {
        padding: 5px 8px;
        font-size: 0.76rem;
        flex-shrink: 0;
    }

    .canvas-container-wrapper {
        min-height: 350px;
        height: 380px;
    }

    .tab-btn {
        padding: 7px 4px;
    }

    .tab-btn span {
        font-size: 0.72rem;
    }

    .weight-item {
        width: 42px;
        height: 42px;
        font-size: 0.78rem;
    }

    .interactive-tip {
        font-size: 0.74rem;
        padding: 8px 10px;
    }
}

@media (max-width: 420px) {
    .header-left .title-container h1 {
        font-size: 0.82rem;
    }
    
    .tab-btn i {
        display: none;
    }

    .canvas-container-wrapper {
        min-height: 330px;
        height: 360px;
    }
}