/* ==========================================================================
   CS2 AIM TRAINING HUB - UNIFIED SPA & DESKTOP DUAL-ENGINE STYLESHEET
   Tactical Glassmorphism + CS2 Electric Orange & Amber Highlights
   ========================================================================== */

:root {
    --bg-main: #0a0c10;
    --bg-surface: #10141d;
    --bg-card: rgba(18, 23, 33, 0.85);
    --bg-card-hover: rgba(24, 30, 44, 0.98);
    --bg-input: #151a26;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 120, 0, 0.4);
    
    /* CS2 Brand Colors */
    --cs-orange: #ff7800;
    --cs-orange-bright: #ff9100;
    --cs-amber: #f59e0b;
    --cs-orange-glow: rgba(255, 120, 0, 0.28);
    --cs-gold: #fbbf24;
    
    /* Functional Accents */
    --accent-cyan: #00d2ff;
    --accent-cyan-glow: rgba(0, 210, 255, 0.25);
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-purple: #a855f7;

    /* Text */
    --text-main: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    /* Fonts */
    --font-heading: 'Rajdhani', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Chakra Petch', 'JetBrains Mono', monospace;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-card: 0 8px 24px -6px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px -3px var(--cs-orange-glow);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(circle at 15% 10%, rgba(255, 120, 0, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 85% 60%, rgba(0, 210, 255, 0.04) 0%, transparent 45%),
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 32px 32px, 32px 32px;
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}
::-webkit-scrollbar-track {
    background: #0d1017;
}
::-webkit-scrollbar-thumb {
    background: #232a3b;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--cs-orange);
}

/* Utilities */
.text-orange { color: var(--cs-orange) !important; }
.text-amber { color: var(--cs-amber) !important; }
.text-cyan { color: var(--accent-cyan) !important; }
.text-green { color: var(--accent-green) !important; }
.text-muted { color: var(--text-muted) !important; }

/* SVG Icon Helper */
.svg-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    fill: currentColor;
    flex-shrink: 0;
    vertical-align: middle;
}
.svg-icon.stroke {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Container */
.app-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 20px 24px 40px 24px;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 16px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-subtle);
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #ff7800 0%, #d97706 100%);
    color: #fff;
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 1px;
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    box-shadow: 0 0 16px rgba(255, 120, 0, 0.4);
    clip-path: polygon(0 0, 100% 0, 92% 100%, 0% 100%);
}

.title-group h1 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #ffffff;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 8px;
}

.title-group h1 span {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 14px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.streak-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 5px 10px;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 13px;
    color: #fbbf24;
}

.streak-badge .svg-icon {
    width: 14px;
    height: 14px;
    color: #f59e0b;
    filter: drop-shadow(0 0 6px #f59e0b);
}

.header-player {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 700;
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 7px 16px;
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.5px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    outline: none;
    text-decoration: none;
    text-transform: uppercase;
}

.btn-primary {
    background: linear-gradient(135deg, #ff7800 0%, #ea580c 100%);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(255, 120, 0, 0.35);
}
.btn-primary:hover {
    background: linear-gradient(135deg, #ff8c1a 0%, #f97316 100%);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border-subtle);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-icon {
    padding: 7px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-icon:hover {
    color: var(--text-main);
    border-color: var(--border-hover);
    background: rgba(255, 120, 0, 0.1);
}

/* Glass Card Base */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
}

/* KPI Summary Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 20px;
}

.kpi-card {
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.kpi-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 8px 24px -4px rgba(0, 0, 0, 0.7), var(--shadow-glow);
}

.kpi-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.kpi-title {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kpi-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
}

.kpi-value-row {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 4px;
}

.kpi-value {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: 0.5px;
    color: #ffffff;
}

.kpi-unit {
    font-size: 13px;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-weight: 600;
}

.kpi-footer {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-muted);
}

.badge-pb {
    background: linear-gradient(135deg, #f59e0b 0%, #b45309 100%);
    color: #000;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}

/* Chart Card Wrapper */
.chart-card-wrapper {
    display: flex;
    flex-direction: column;
}

/* Card Header */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
    flex-wrap: wrap;
    gap: 10px;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
}

.card-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.select-compact {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 12px;
    padding: 5px 8px;
    border-radius: var(--radius-sm);
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}
.select-compact:hover, .select-compact:focus {
    border-color: var(--cs-orange);
}

/* Time Range Filter Bar */
.time-filter-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 18px;
    background: rgba(12, 16, 24, 0.6);
    border-bottom: 1px solid var(--border-subtle);
    flex-wrap: wrap;
    gap: 8px;
}

.time-chip-group {
    display: flex;
    background: var(--bg-input);
    padding: 3px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    gap: 2px;
    overflow-x: auto;
    max-width: 100%;
}

.time-chip {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.time-chip:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}
.time-chip.active {
    background: var(--cs-orange);
    color: #fff;
    box-shadow: 0 2px 8px rgba(255, 120, 0, 0.35);
}

.custom-range-box {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.date-input-compact {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 4px 6px;
    border-radius: var(--radius-sm);
    outline: none;
    color-scheme: dark;
}

/* Range Stats Bar */
.range-stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: rgba(0, 0, 0, 0.25);
    border-bottom: 1px solid var(--border-subtle);
    padding: 8px 18px;
    gap: 10px;
}

.range-stat-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.range-stat-item .label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    font-family: var(--font-heading);
    letter-spacing: 0.5px;
}
.range-stat-item .val {
    font-family: var(--font-heading);
    font-size: 15px;
    font-weight: 700;
    color: #ffffff;
}

/* Chart Canvas Container */
.chart-body {
    padding: 14px 16px;
    min-height: 340px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.empty-chart-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-muted);
    height: 100%;
    text-align: center;
}

/* Training Container */
.training-analytics-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Heatmap Section */
.heatmap-card {
    padding: 16px 18px;
}

.heatmap-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.heatmap-grid-container {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 6px;
}

.heatmap-day-labels {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    font-size: 10px;
    color: var(--text-muted);
    height: 98px;
    padding-right: 4px;
}

.heatmap-weeks {
    display: flex;
    gap: 4px;
}

.heatmap-week-col {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.heatmap-cell {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    background: #151a24;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
}
.heatmap-cell:hover {
    transform: scale(1.4);
    z-index: 10;
    box-shadow: 0 0 8px rgba(255, 120, 0, 0.6);
}

.heatmap-cell.level-0 { background: #151a24; }
.heatmap-cell.level-1 { background: #78350f; }
.heatmap-cell.level-2 { background: #b45309; }
.heatmap-cell.level-3 { background: #f59e0b; }
.heatmap-cell.level-4 { background: #ff9800; box-shadow: 0 0 5px rgba(255, 152, 0, 0.4); }
.heatmap-cell.future { opacity: 0.12; pointer-events: none; }
.heatmap-cell.is-today {
    border: 1.5px solid #ff7800 !important;
    box-shadow: 0 0 8px rgba(255, 120, 0, 0.8) !important;
}

.heatmap-legend {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 5px;
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 8px;
}

.heatmap-floating-tooltip {
    position: absolute;
    z-index: 9999;
    background: rgba(14, 18, 26, 0.95);
    border: 1px solid var(--border-hover);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 11px;
    line-height: 1.4;
    color: #fff;
    pointer-events: none;
    box-shadow: 0 8px 20px rgba(0,0,0,0.8);
    display: none;
    font-family: var(--font-mono);
}

/* Weapon Stats Rows */
.weapon-stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 8px;
    transition: background 0.2s, border-color 0.2s;
}
.weapon-stat-row:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 120, 0, 0.25);
}

.weapon-name-col {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.weapon-badge {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 13px;
    color: #ffffff;
}

.weapon-count {
    font-size: 11px;
    color: var(--text-muted);
}

.weapon-metric-col {
    display: flex;
    gap: 14px;
}

.metric-mini {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}
.metric-mini .label {
    font-size: 9px;
    color: var(--text-muted);
    text-transform: uppercase;
}
.metric-mini .val {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 13px;
}

/* History Section */
.history-section {
    display: flex;
    flex-direction: column;
}

.table-filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 18px;
    background: rgba(20, 26, 38, 0.5);
    border-bottom: 1px solid var(--border-subtle);
    flex-wrap: wrap;
    gap: 10px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-btn-group {
    display: flex;
    background: var(--bg-input);
    padding: 3px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    overflow-x: auto;
    max-width: 100%;
}

.filter-chip {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.filter-chip.active {
    background: var(--cs-orange);
    color: #fff;
    box-shadow: 0 2px 8px rgba(255, 120, 0, 0.35);
}

/* Desktop Data Table */
.desktop-table-container {
    display: block;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    text-align: left;
}

.data-table th {
    background: rgba(14, 18, 26, 0.6);
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 11px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-subtle);
}

.data-table td {
    padding: 11px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-main);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background 0.15s;
}
.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.025);
}

.tag-mode {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    color: var(--text-secondary);
}

.tag-weapon {
    display: inline-block;
    background: rgba(0, 210, 255, 0.08);
    border: 1px solid rgba(0, 210, 255, 0.2);
    color: #38bdf8;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 4px;
}

.time-val {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
    color: var(--cs-orange);
}

.kpm-val {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-cyan);
}

.action-btn-mini {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 11px;
    font-family: var(--font-heading);
    font-weight: 700;
}
.action-btn-mini:hover {
    color: #fff;
    border-color: var(--cs-orange);
    background: rgba(255, 120, 0, 0.15);
}

/* Mobile Record Card Stream */
.mobile-card-list {
    display: none;
    padding: 12px;
    flex-direction: column;
    gap: 10px;
}

.mobile-record-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.m-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.m-card-id {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
}

.m-card-date {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-secondary);
}

.m-card-stats {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.2);
    padding: 8px 12px;
    border-radius: 6px;
}

.m-stat-block {
    display: flex;
    flex-direction: column;
}
.m-stat-block .m-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    font-family: var(--font-heading);
}
.m-stat-block .m-val {
    font-family: var(--font-heading);
    font-size: 17px;
    font-weight: 700;
}

.m-card-note-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 4px;
    padding: 6px 10px;
    border-left: 2.5px solid var(--cs-orange);
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(6, 8, 12, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.modal-backdrop.active {
    display: flex;
    opacity: 1;
}

.modal-card {
    background: #121722;
    border: 1px solid rgba(255, 120, 0, 0.4);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.8), 0 0 30px rgba(255, 120, 0, 0.2);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 500px;
    overflow: hidden;
    animation: modalSlideUp 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideUp {
    from { transform: translateY(16px) scale(0.97); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-subtle);
}

.modal-header h3 {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
}
.modal-close-btn:hover {
    color: #fff;
}

.modal-body {
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
}

.form-input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 9px 12px;
    color: #ffffff;
    font-size: 13px;
    font-family: var(--font-body);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-input:focus {
    border-color: var(--cs-orange);
    box-shadow: 0 0 10px rgba(255, 120, 0, 0.25);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 14px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid var(--border-subtle);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 20000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #141926;
    border: 1px solid var(--border-subtle);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0,0,0,0.6);
    color: #fff;
    font-size: 13px;
    animation: toastIn 0.25s ease-out;
}
.toast.success { border-color: var(--accent-green); }
.toast.error { border-color: var(--accent-red); }

@keyframes toastIn {
    from { transform: translateX(30px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* =======================================================
   MOBILE BOTTOM NAVIGATION BAR
   ======================================================= */

.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(12, 16, 24, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 9999;
    justify-content: space-around;
    align-items: center;
    padding: 0 8px;
    box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.8);
}

.nav-tab-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: var(--radius-md);
    transition: all 0.15s ease;
    flex: 1;
}

.nav-tab-btn .svg-icon {
    width: 19px;
    height: 19px;
}

.nav-tab-btn.active {
    color: var(--cs-orange);
}
.nav-tab-btn.active .svg-icon {
    transform: translateY(-2px);
    color: var(--cs-orange);
    filter: drop-shadow(0 0 8px rgba(255, 120, 0, 0.7));
}

/* =======================================================
   RESPONSIVE LAYOUT ENGINE
   ======================================================= */

/* 📱 MOBILE VIEW ENGINE (< 992px) */
@media (max-width: 991px) {
    .mobile-bottom-nav {
        display: flex;
    }

    .desktop-only {
        display: none !important;
    }

    .app-container {
        padding: 12px 14px 76px 14px; /* Space for bottom nav */
    }

    .app-header {
        padding-bottom: 12px;
        margin-bottom: 14px;
    }

    .title-group h1 span {
        display: none;
    }

    /* 2x2 KPI Grid on Mobile */
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        margin-bottom: 14px;
    }

    .kpi-card {
        padding: 12px 14px;
    }

    .kpi-value {
        font-size: 22px;
    }

    .chart-body {
        min-height: 280px;
        padding: 10px;
    }

    .range-stats-bar {
        grid-template-columns: repeat(2, 1fr);
        padding: 8px 12px;
        gap: 8px;
    }

    .time-filter-toolbar {
        padding: 8px 12px;
    }

    /* Mobile Table: Show Cards, Hide Wide Table */
    .desktop-table-container {
        display: none !important;
    }

    .mobile-card-list {
        display: flex;
    }

    /* 🌟 TRUE SPA PAGE ROUTING ON MOBILE: ONLY ACTIVE PAGE IS DISPLAYED */
    .app-page {
        display: none;
    }

    .app-page.active {
        display: block;
        animation: pageFadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    }

    @keyframes pageFadeIn {
        from { opacity: 0; transform: translateY(6px); }
        to { opacity: 1; transform: translateY(0); }
    }
}

/* 🖥️ DESKTOP WIDESCREEN ENGINE (>= 992px) */
@media (min-width: 992px) {
    .mobile-bottom-nav {
        display: none !important;
    }

    .desktop-table-container {
        display: block !important;
    }

    .mobile-card-list {
        display: none !important;
    }

    /* On Desktop, all sections flow together as a unified widescreen dashboard */
    .app-page {
        display: block !important;
    }

    .spa-main-content {
        display: grid;
        grid-template-columns: 2fr 1fr;
        grid-template-areas: 
            "overview training"
            "history history"
            "settings settings";
        gap: 20px;
    }

    #pageOverview {
        grid-area: overview;
    }

    #pageTraining {
        grid-area: training;
    }

    #pageHistory {
        grid-area: history;
    }

    #pageSettings {
        grid-area: settings;
    }
}