/* CSS Variables for Yubi Custom Theme */
:root {
    --bg-app: #0E1D21;            /* Deep Night Canvas */
    --bg-card: rgba(18, 46, 52, 0.75); /* Dark Teal Glass Card */
    --bg-card-hover: rgba(28, 65, 74, 0.88);
    --bg-sidebar: #0E1D21;
    --bg-accent-plum: #622347;     /* Deep Plum Accent */
    
    --border-glow: rgba(224, 180, 178, 0.2);
    --border-color: rgba(103, 126, 138, 0.35); /* Steel Blue Border */
    
    --text-primary: #E0B4B2;       /* Soft Blush Rose Primary Text */
    --text-secondary: #ABAFB5;     /* Light Slate Grey Secondary Text */
    --text-muted: #677E8A;         /* Steel Blue Grey Muted Text */
    
    --color-accent: #E0B4B2;       /* Rose Accent */
    --color-plum: #622347;         /* Deep Plum */
    --color-positive: #52B788;     /* Mint Emerald Accuracy */
    --color-warning: #E5A866;      /* Amber Warning */
    --color-negative: #E05A65;     /* Coral Rose Error */
    --color-streak: #E0B4B2;       /* Streak Rose */
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Layout Structure */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 320px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    flex-shrink: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 2.4rem;
    height: 2.4rem;
    object-fit: contain;
    border-radius: 6px;
}

.logo-text h1 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

/* Upload Widget */
.upload-widget h3, .profiles-section h3 {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 1.5rem 1rem;
    text-align: center;
    background: rgba(18, 46, 52, 0.4);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--color-accent);
    background: rgba(98, 35, 71, 0.25);
    box-shadow: 0 0 15px var(--border-glow);
}

.upload-icon {
    width: 2.5rem;
    height: 2.5rem;
    color: var(--text-secondary);
}

.drop-zone p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Buttons */
.btn-primary {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    background-color: var(--color-plum);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
    border: 1px solid rgba(224, 180, 178, 0.3);
}

.btn-primary:hover {
    background-color: #782c57;
    transform: translateY(-1px);
    box-shadow: 0 0 12px rgba(224, 180, 178, 0.2);
}

.btn-secondary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    font-size: 0.85rem;
    font-weight: 500;
    background-color: rgba(18, 46, 52, 0.8);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-secondary:hover {
    background-color: rgba(103, 126, 138, 0.25);
    border-color: var(--text-secondary);
}

.btn-danger {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    font-size: 0.85rem;
    font-weight: 500;
    background-color: rgba(224, 90, 101, 0.15);
    color: var(--color-negative);
    border: 1px solid rgba(224, 90, 101, 0.3);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-danger:hover {
    background-color: rgba(224, 90, 101, 0.3);
    border-color: var(--color-negative);
}

.btn-demo {
    width: 100%;
    margin-top: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    font-size: 0.82rem;
    font-weight: 600;
    background: linear-gradient(135deg, rgba(98, 35, 71, 0.6), rgba(18, 46, 52, 0.8));
    color: var(--color-accent);
    border: 1px solid var(--border-glow);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-demo:hover {
    background: linear-gradient(135deg, rgba(98, 35, 71, 0.9), rgba(18, 46, 52, 0.95));
    border-color: var(--color-accent);
    box-shadow: 0 0 12px var(--border-glow);
}

.empty-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.btn-icon {
    width: 1rem;
    height: 1rem;
}

.hidden-input {
    display: none;
}

/* Profile Switcher List */
.profile-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 0.25rem;
}

.profile-empty-state {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.4;
    text-align: center;
    padding: 1rem 0;
}

.profile-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    border: 1px solid transparent;
    cursor: pointer;
    background-color: rgba(18, 46, 52, 0.4);
    transition: var(--transition-fast);
}

.profile-item:hover {
    background-color: rgba(18, 46, 52, 0.8);
    border-color: var(--border-color);
}

.profile-item.active {
    background: rgba(98, 35, 71, 0.4);
    border-color: var(--color-accent);
    box-shadow: inset 0 0 10px rgba(224, 180, 178, 0.1);
}

.profile-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    overflow: hidden;
}

.profile-name {
    font-weight: 600;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.profile-details {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.profile-active-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-accent);
    box-shadow: 0 0 8px var(--color-accent);
}

.sidebar-footer {
    margin-top: auto;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
}

/* Main Dashboard Area */
.main-content {
    flex-grow: 1;
    padding: 2.5rem;
    overflow-y: auto;
    height: 100vh;
}

/* Empty Dashboard State */
.empty-dashboard {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-card {
    max-width: 500px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 3rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
}

.icon-ring {
    width: 4.5rem;
    height: 4.5rem;
    border-radius: 50%;
    background: rgba(98, 35, 71, 0.3);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
}

.icon-ring svg {
    width: 2.25rem;
    height: 2.25rem;
}

.empty-card h2 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.6rem;
    color: var(--text-primary);
}

.empty-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Dashboard Grid when active */
.dashboard-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.25rem;
}

.user-meta h2 {
    font-family: var(--font-heading);
    font-size: 1.85rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    font-size: 0.7rem;
    font-weight: 600;
    background-color: var(--color-plum);
    color: var(--text-primary);
    border-radius: 20px;
    border: 1px solid rgba(224, 180, 178, 0.3);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

/* Filter Bar */
.filters-bar {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1rem 1.25rem;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.filter-select {
    background: #0E1D21;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.4rem 0.8rem;
    font-size: 0.825rem;
    outline: none;
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-select:hover, .filter-select:focus {
    border-color: var(--color-accent);
    background: rgba(98, 35, 71, 0.2);
}

.filter-summary {
    margin-left: auto;
    font-size: 0.775rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Stats Cards Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.25rem;
}

.stats-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: var(--transition-normal);
}

.stats-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 550;
}

.card-icon {
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wpm-icon { background: rgba(224, 180, 178, 0.15); color: var(--color-accent); }
.peak-icon { background: rgba(229, 168, 102, 0.15); color: var(--color-warning); }
.accuracy-icon { background: rgba(82, 183, 136, 0.15); color: var(--color-positive); }
.sessions-icon { background: rgba(171, 175, 181, 0.15); color: var(--text-secondary); }
.streak-icon { background: rgba(98, 35, 71, 0.4); color: var(--color-accent); }

.card-icon svg {
    width: 1rem;
    height: 1rem;
}

.card-value {
    font-family: var(--font-heading);
    font-size: 1.85rem;
    font-weight: 700;
    color: var(--text-primary);
}

.card-footer {
    font-size: 0.725rem;
    font-weight: 500;
}

.text-positive { color: var(--color-positive); }
.text-highlight { color: var(--color-warning); }
.text-streak { color: var(--color-accent); }
.text-muted { color: var(--text-muted); }

/* Charts Row */
.charts-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 1.5rem;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.chart-header h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.chart-body {
    position: relative;
    height: 280px;
    width: 100%;
}

/* Keyboard Section & Selector */
.keyboard-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
}

.section-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
    gap: 1rem;
}

.section-header-flex h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.heatmap-mode-selector {
    display: flex;
    background: #0E1D21;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 3px;
    gap: 3px;
}

.btn-toggle {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.btn-toggle.active {
    background: var(--color-plum);
    color: var(--text-primary);
    border: 1px solid rgba(224, 180, 178, 0.3);
}

.keyboard-legend {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.775rem;
    color: var(--text-secondary);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.level-perfect { background-color: var(--color-positive); }
.level-good { background-color: #52B788; }
.level-warning { background-color: var(--color-warning); }
.level-poor { background-color: var(--color-negative); }
.level-unused { background-color: #677E8A; }

/* Keyboard Container and Keys */
.keyboard-container {
    display: flex;
    justify-content: center;
    background-color: rgba(14, 29, 33, 0.6);
    border-radius: 12px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
}

.keyboard {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    width: 100%;
    max-width: 900px;
}

.keyboard-row {
    display: flex;
    gap: 0.4rem;
    width: 100%;
}

.justify-center {
    justify-content: center;
}

.key {
    background: #122E34;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
    flex: 1;
    color: var(--text-primary);
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.key:hover {
    transform: translateY(-2px);
    border-color: var(--color-accent);
    box-shadow: 0 0 10px rgba(224, 180, 178, 0.2);
}

.key-action {
    background-color: #0E1D21;
    font-size: 0.75rem;
    color: var(--text-muted);
    cursor: default;
}
.key-action:hover {
    transform: none;
    border-color: var(--border-color);
}

.key-backspace { flex-grow: 1.7; }
.key-tab { flex-grow: 1.4; }
.key-caps { flex-grow: 1.7; }
.key-enter { flex-grow: 1.7; }
.key-leftshift { flex-grow: 2.1; }
.key-rightshift { flex-grow: 2.1; }
.key-space { flex-grow: 6.5; }

/* Keyboard Heatmap Color states */
.key.perfect {
    background-color: rgba(82, 183, 136, 0.25);
    border-color: rgba(82, 183, 136, 0.6);
    color: #b7e4c7;
}
.key.good {
    background-color: rgba(82, 183, 136, 0.15);
    border-color: rgba(82, 183, 136, 0.4);
    color: #d8f3dc;
}
.key.warning {
    background-color: rgba(229, 168, 102, 0.2);
    border-color: rgba(229, 168, 102, 0.5);
    color: #fde68a;
}
.key.poor {
    background-color: rgba(220, 90, 101, 0.25);
    border-color: rgba(220, 90, 101, 0.6);
    color: #fecaca;
}

/* History Table Section */
.history-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
}

.table-card {
    border-radius: 10px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    background-color: rgba(14, 29, 33, 0.4);
}

.table-container {
    max-height: 400px;
    overflow-y: auto;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.825rem;
}

.history-table th {
    background-color: #0E1D21;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.history-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.history-table tbody tr {
    transition: var(--transition-fast);
}

.history-table tbody tr:hover {
    background-color: rgba(98, 35, 71, 0.15);
}

.history-table tbody tr:last-child td {
    border-bottom: none;
}

.cell-wpm {
    font-weight: 600;
    color: var(--color-accent);
}

.tag-badge {
    display: inline-block;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    background: rgba(98, 35, 71, 0.3);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.acc-pill-container {
    display: flex;
    gap: 0.25rem;
}

.acc-pill {
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 550;
    background: rgba(103, 126, 138, 0.15);
    color: var(--text-secondary);
}

.acc-pill.perfect { background-color: rgba(82, 183, 136, 0.2); color: #52B788; }
.acc-pill.good { background-color: rgba(82, 183, 136, 0.12); color: #74c69d; }
.acc-pill.warning { background-color: rgba(229, 168, 102, 0.15); color: #E5A866; }
.acc-pill.poor { background-color: rgba(224, 90, 101, 0.15); color: #E05A65; }

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(14, 29, 33, 0.85);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease-out;
}

.modal-card {
    background: #122E34;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    width: 90%;
    max-width: 480px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: #0E1D21;
}

.modal-title-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.key-badge {
    width: 2.75rem;
    height: 2.75rem;
    background: var(--color-plum);
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.4rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(224, 180, 178, 0.3);
    box-shadow: 0 0 15px rgba(224, 180, 178, 0.2);
}

.modal-header h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-subtitle {
    font-size: 0.775rem;
    color: var(--text-secondary);
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.modal-close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.modal-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    background: #0E1D21;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.modal-stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.modal-stat-item .label {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 500;
}

.modal-stat-item .value {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-mistakes-section h4 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.modal-desc {
    font-size: 0.775rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.mistakes-pills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.mistake-pill {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(224, 90, 101, 0.15);
    border: 1px solid rgba(224, 90, 101, 0.3);
    padding: 0.35rem 0.65rem;
    border-radius: 6px;
    font-size: 0.8rem;
}

.mistake-pill .char {
    font-weight: 700;
    color: var(--color-negative);
}

.mistake-pill .count {
    font-size: 0.725rem;
    color: var(--text-secondary);
}

/* Micro-animations */
.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: .7; transform: scale(0.96); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}

.hidden {
    display: none !important;
}

/* 2-Second Blue Light Emitting Keyframe Animation */
@keyframes pulse-blue-glow {
    0%, 100% {
        box-shadow: 0 0 6px rgba(56, 189, 248, 0.4), 0 0 12px rgba(56, 189, 248, 0.2);
        border-color: rgba(56, 189, 248, 0.6);
    }
    50% {
        box-shadow: 0 0 22px rgba(56, 189, 248, 0.95), 0 0 40px rgba(56, 189, 248, 0.7), inset 0 0 12px rgba(56, 189, 248, 0.35);
        border-color: #38bdf8;
    }
}

/* Documentation & Setup Guide Styling */
.btn-doc {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    font-size: 0.825rem;
    font-weight: 600;
    background: rgba(14, 42, 54, 0.95);
    color: #e0f2fe;
    border: 1.5px solid #38bdf8;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-bottom: 0.75rem;
    animation: pulse-blue-glow 2s infinite ease-in-out;
}

.btn-doc:hover {
    background: rgba(56, 189, 248, 0.25);
    color: #ffffff;
    box-shadow: 0 0 25px rgba(56, 189, 248, 1);
}

/* Light Emitting Note Card */
.glow-note-card {
    background: rgba(14, 42, 54, 0.85);
    border: 1.5px solid #38bdf8;
    border-radius: 10px;
    padding: 0.9rem 1.1rem;
    margin: 0.4rem 0 0.6rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.blue-glow-pulse {
    animation: pulse-blue-glow 2s infinite ease-in-out;
}

.glow-note-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #38bdf8;
}

.glow-note-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: #38bdf8;
    flex-shrink: 0;
}

.glow-note-title {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: #38bdf8;
}

.glow-note-body {
    font-size: 0.85rem;
    color: #f0f9ff;
    line-height: 1.45;
    margin: 0;
}

.glow-note-body strong {
    color: #38bdf8;
    font-weight: 800;
}

.docs-modal-card {
    max-width: 680px;
    width: 90%;
}

.doc-icon-badge {
    width: 2.4rem;
    height: 2.4rem;
    background: rgba(98, 35, 71, 0.4);
    border: 1px solid var(--border-glow);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
}

.doc-icon-badge svg {
    width: 1.3rem;
    height: 1.3rem;
}

.docs-body {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    max-height: 70vh;
    overflow-y: auto;
    padding-right: 0.25rem;
}

.doc-step-card {
    background: rgba(18, 46, 52, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.step-header h4 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    color: var(--text-primary);
    margin: 0;
}

.step-badge {
    padding: 0.2rem 0.6rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--color-plum);
    color: var(--text-primary);
    border-radius: 4px;
}

.step-badge.alt-badge {
    background: rgba(103, 126, 138, 0.4);
    color: var(--text-secondary);
}

.doc-step-card p {
    font-size: 0.825rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin: 0;
}

.doc-sublabel {
    font-size: 0.775rem;
    font-weight: 550;
    color: var(--text-secondary);
    margin-top: 0.4rem;
    margin-bottom: -0.1rem;
}

.code-snippet-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #091418;
    border: 1px solid rgba(103, 126, 138, 0.3);
    border-radius: 8px;
    padding: 0.65rem 0.85rem;
    margin-top: 0.25rem;
    gap: 0.75rem;
}

.code-snippet-box pre {
    margin: 0;
    overflow-x: auto;
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 0.825rem;
    color: #e2e8f0;
}

.code-snippet-box code {
    white-space: pre-wrap;
    word-break: break-all;
}

.btn-copy {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(18, 46, 52, 0.9);
    color: var(--color-accent);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.btn-copy:hover {
    background: rgba(98, 35, 71, 0.6);
    border-color: var(--color-accent);
    color: #ffffff;
}

.btn-copy.copied {
    background: rgba(82, 183, 136, 0.25);
    border-color: var(--color-positive);
    color: var(--color-positive);
}

.copy-icon {
    width: 0.85rem;
    height: 0.85rem;
}

.doc-instructions-list {
    margin: 0;
    padding-left: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.doc-instructions-list li {
    font-size: 0.825rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

kbd {
    display: inline-block;
    padding: 0.15rem 0.45rem;
    font-family: monospace;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    background: rgba(18, 46, 52, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Responsive Scaling & Mobile Restriction */
.mobile-unavailable-container {
    display: none;
}

@media (max-width: 1400px) {
    .charts-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 1024px) {
    .app-container,
    .modal-overlay {
        display: none !important;
    }

    .mobile-unavailable-container {
        display: flex !important;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: var(--bg-app);
        background-image: 
            radial-gradient(circle at 50% 30%, rgba(98, 35, 71, 0.35) 0%, transparent 70%),
            radial-gradient(circle at 80% 80%, rgba(18, 46, 52, 0.6) 0%, transparent 50%);
        align-items: center;
        justify-content: center;
        padding: 1.5rem;
        z-index: 99999;
        text-align: center;
    }

    .mobile-unavailable-card {
        max-width: 440px;
        width: 100%;
        background: rgba(18, 46, 52, 0.85);
        border: 1px solid var(--border-color);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-radius: 24px;
        padding: 2.5rem 2rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1.25rem;
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 25px rgba(98, 35, 71, 0.2);
        animation: fadeIn 0.4s ease-out;
    }

    .mobile-icon-ring {
        width: 4.5rem;
        height: 4.5rem;
        border-radius: 50%;
        background: rgba(224, 90, 101, 0.15);
        border: 1.5px solid rgba(224, 90, 101, 0.4);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--color-negative);
    }

    .mobile-icon-ring svg {
        width: 2.25rem;
        height: 2.25rem;
    }

    .mobile-unavailable-badge {
        display: inline-block;
        padding: 0.25rem 0.75rem;
        font-size: 0.725rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        background: rgba(98, 35, 71, 0.5);
        color: var(--color-accent);
        border-radius: 20px;
        border: 1px solid var(--border-glow);
    }

    .mobile-unavailable-card h2 {
        font-family: var(--font-heading);
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--text-primary);
        letter-spacing: -0.01em;
    }

    .mobile-message {
        font-size: 0.95rem;
        color: var(--text-primary);
        line-height: 1.5;
        font-weight: 500;
        background: rgba(14, 29, 33, 0.6);
        padding: 1rem 1.25rem;
        border-radius: 12px;
        border: 1px dashed var(--border-color);
    }

    .mobile-hint {
        display: flex;
        align-items: center;
        gap: 0.65rem;
        font-size: 0.8rem;
        color: var(--text-secondary);
        text-align: left;
        line-height: 1.4;
        background: rgba(14, 42, 54, 0.5);
        padding: 0.85rem 1rem;
        border-radius: 10px;
        border: 1px solid rgba(103, 126, 138, 0.2);
    }

    .hint-icon {
        width: 1.4rem;
        height: 1.4rem;
        color: var(--color-accent);
        flex-shrink: 0;
    }
}