/* Microsoft Fluent Design System - MTB Tracker Theme */

/* Fluent Design Tokens */
:root {
    /* Color Palette */
    --fluent-primary: #0078d4;
    --fluent-primary-hover: #106ebe;
    --fluent-primary-pressed: #005a9e;
    --fluent-primary-light: #deecf9;
    
    --fluent-text-primary: #323130;
    --fluent-text-secondary: #605e5c;
    --fluent-text-tertiary: #8a8886;
    --fluent-text-disabled: #a19f9d;
    --fluent-text-white: #ffffff;
    
    --fluent-bg-primary: #ffffff;
    --fluent-bg-secondary: #f3f2f1;
    --fluent-bg-tertiary: #faf9f8;
    --fluent-bg-quaternary: #f8f7f6;
    
    --fluent-surface-primary: #ffffff;
    --fluent-surface-secondary: #f3f2f1;
    --fluent-surface-stroke: #e1dfdd;
    --fluent-surface-stroke-flyout: #c8c6c4;
    
    --fluent-accent-colors: #0078d4;
    --fluent-success: #107c10;
    --fluent-warning: #ffb900;
    --fluent-error: #d13438;
    --fluent-info: #0078d4;
    
    /* Typography */
    --fluent-font-family: 'Segoe UI', 'Segoe UI Web', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    --fluent-font-size-caption: 12px;
    --fluent-font-size-body: 14px;
    --fluent-font-size-subtitle: 16px;
    --fluent-font-size-title-3: 20px;
    --fluent-font-size-title-2: 24px;
    --fluent-font-size-title-1: 32px;
    --fluent-font-size-large-title: 40px;
    --fluent-font-size-display: 68px;
    
    --fluent-font-weight-regular: 400;
    --fluent-font-weight-medium: 500;
    --fluent-font-weight-semibold: 600;
    --fluent-font-weight-bold: 700;
    
    /* Spacing */
    --fluent-spacing-2xs: 2px;
    --fluent-spacing-xs: 4px;
    --fluent-spacing-s: 8px;
    --fluent-spacing-m: 12px;
    --fluent-spacing-l: 16px;
    --fluent-spacing-xl: 20px;
    --fluent-spacing-2xl: 24px;
    --fluent-spacing-3xl: 32px;
    --fluent-spacing-4xl: 40px;
    --fluent-spacing-5xl: 48px;
    
    /* Border Radius */
    --fluent-border-radius-none: 0px;
    --fluent-border-radius-small: 2px;
    --fluent-border-radius-medium: 4px;
    --fluent-border-radius-large: 6px;
    --fluent-border-radius-xl: 8px;
    --fluent-border-radius-circular: 50%;
    
    /* Shadows - Fluent Depth System */
    --fluent-shadow-2: 0px 1px 2px rgba(0, 0, 0, 0.14), 0px 0px 2px rgba(0, 0, 0, 0.12);
    --fluent-shadow-4: 0px 2px 4px rgba(0, 0, 0, 0.14), 0px 0px 2px rgba(0, 0, 0, 0.12);
    --fluent-shadow-8: 0px 4px 8px rgba(0, 0, 0, 0.14), 0px 0px 2px rgba(0, 0, 0, 0.12);
    --fluent-shadow-16: 0px 8px 16px rgba(0, 0, 0, 0.14), 0px 0px 2px rgba(0, 0, 0, 0.12);
    --fluent-shadow-32: 0px 16px 32px rgba(0, 0, 0, 0.14), 0px 0px 2px rgba(0, 0, 0, 0.12);
    --fluent-shadow-64: 0px 32px 64px rgba(0, 0, 0, 0.14), 0px 0px 2px rgba(0, 0, 0, 0.12);
    
    /* Motion */
    --fluent-duration-ultra-fast: 50ms;
    --fluent-duration-faster: 100ms;
    --fluent-duration-fast: 150ms;
    --fluent-duration-normal: 200ms;
    --fluent-duration-gentle: 250ms;
    --fluent-duration-slow: 300ms;
    --fluent-duration-slower: 400ms;
    --fluent-duration-ultra-slow: 500ms;
    
    --fluent-curve-accelerate-max: cubic-bezier(1, 0, 1, 1);
    --fluent-curve-accelerate-mid: cubic-bezier(0.7, 0, 1, 0.5);
    --fluent-curve-accelerate-min: cubic-bezier(0.8, 0, 1, 0.2);
    --fluent-curve-decelerate-max: cubic-bezier(0, 0, 0, 1);
    --fluent-curve-decelerate-mid: cubic-bezier(0.1, 0.9, 0.2, 1);
    --fluent-curve-decelerate-min: cubic-bezier(0.33, 0, 0.1, 1);
    --fluent-curve-max-easy-ease: cubic-bezier(0.8, 0, 0.2, 1);
    --fluent-curve-easy-ease: cubic-bezier(0.33, 0, 0.67, 1);
    --fluent-curve-linear: cubic-bezier(0, 0, 1, 1);
}

/* Dark Mode Variables */
:root[data-theme="dark"] {
    --fluent-text-primary: #ffffff;
    --fluent-text-secondary: #c8c6c4;
    --fluent-text-tertiary: #a19f9d;
    --fluent-text-disabled: #797775;
    
    --fluent-bg-primary: #1b1a19;
    --fluent-bg-secondary: #201f1e;
    --fluent-bg-tertiary: #292827;
    --fluent-bg-quaternary: #323130;
    
    --fluent-surface-primary: #201f1e;
    --fluent-surface-secondary: #292827;
    --fluent-surface-stroke: #323130;
    --fluent-surface-stroke-flyout: #3b3a39;
}

/* Base Styles */
.fluent-theme {
    font-family: var(--fluent-font-family);
    font-size: var(--fluent-font-size-body);
    line-height: 1.4;
    color: var(--fluent-text-primary);
    background-color: var(--fluent-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.fluent-theme * {
    box-sizing: border-box;
}

/* Typography */
.fluent-display {
    font-size: var(--fluent-font-size-display);
    font-weight: var(--fluent-font-weight-semibold);
    line-height: 1.1;
}

.fluent-large-title {
    font-size: var(--fluent-font-size-large-title);
    font-weight: var(--fluent-font-weight-semibold);
    line-height: 1.2;
}

.fluent-title-1 {
    font-size: var(--fluent-font-size-title-1);
    font-weight: var(--fluent-font-weight-semibold);
    line-height: 1.25;
}

.fluent-title-2 {
    font-size: var(--fluent-font-size-title-2);
    font-weight: var(--fluent-font-weight-semibold);
    line-height: 1.3;
}

.fluent-title-3 {
    font-size: var(--fluent-font-size-title-3);
    font-weight: var(--fluent-font-weight-semibold);
    line-height: 1.3;
}

.fluent-subtitle {
    font-size: var(--fluent-font-size-subtitle);
    font-weight: var(--fluent-font-weight-regular);
    line-height: 1.4;
}

.fluent-body {
    font-size: var(--fluent-font-size-body);
    font-weight: var(--fluent-font-weight-regular);
    line-height: 1.4;
}

.fluent-caption {
    font-size: var(--fluent-font-size-caption);
    font-weight: var(--fluent-font-weight-regular);
    line-height: 1.3;
}

/* Layout Components */
.fluent-container {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--fluent-spacing-l);
}

.fluent-grid {
    display: grid;
    gap: var(--fluent-spacing-l);
}

.fluent-flex {
    display: flex;
    gap: var(--fluent-spacing-m);
}

.fluent-flex-column {
    display: flex;
    flex-direction: column;
    gap: var(--fluent-spacing-m);
}

/* Command Bar (Navigation) */
.fluent-command-bar {
    background: var(--fluent-surface-primary);
    border-bottom: 1px solid var(--fluent-surface-stroke);
    height: 48px;
    display: flex;
    align-items: center;
    padding: 0 var(--fluent-spacing-l);
    box-shadow: var(--fluent-shadow-2);
}

.fluent-command-bar-brand {
    font-size: var(--fluent-font-size-subtitle);
    font-weight: var(--fluent-font-weight-semibold);
    color: var(--fluent-text-primary);
    text-decoration: none;
    margin-right: var(--fluent-spacing-3xl);
}

.fluent-command-bar-nav {
    display: flex;
    align-items: center;
    gap: var(--fluent-spacing-xl);
    margin-left: auto;
}

.fluent-command-bar-item {
    color: var(--fluent-text-secondary);
    text-decoration: none;
    font-size: var(--fluent-font-size-body);
    padding: var(--fluent-spacing-s) var(--fluent-spacing-m);
    border-radius: var(--fluent-border-radius-medium);
    transition: all var(--fluent-duration-normal) var(--fluent-curve-easy-ease);
}

.fluent-command-bar-item:hover {
    background: var(--fluent-bg-secondary);
    color: var(--fluent-text-primary);
}

.fluent-command-bar-item.active {
    color: var(--fluent-primary);
    background: var(--fluent-primary-light);
}

/* Cards */
.fluent-card {
    background: var(--fluent-surface-primary);
    border: 1px solid var(--fluent-surface-stroke);
    border-radius: var(--fluent-border-radius-large);
    padding: var(--fluent-spacing-l);
    box-shadow: var(--fluent-shadow-2);
    transition: all var(--fluent-duration-normal) var(--fluent-curve-easy-ease);
}

.fluent-card:hover {
    box-shadow: var(--fluent-shadow-4);
    border-color: var(--fluent-surface-stroke-flyout);
}

.fluent-card-header {
    margin-bottom: var(--fluent-spacing-l);
}

.fluent-card-title {
    font-size: var(--fluent-font-size-title-3);
    font-weight: var(--fluent-font-weight-semibold);
    color: var(--fluent-text-primary);
    margin: 0 0 var(--fluent-spacing-xs) 0;
}

.fluent-card-subtitle {
    font-size: var(--fluent-font-size-body);
    color: var(--fluent-text-secondary);
    margin: 0;
}

.fluent-card-content {
    color: var(--fluent-text-primary);
}

/* Metric Cards */
.fluent-metric-card {
    background: var(--fluent-surface-primary);
    border: 1px solid var(--fluent-surface-stroke);
    border-radius: var(--fluent-border-radius-large);
    padding: var(--fluent-spacing-l);
    text-align: center;
    transition: all var(--fluent-duration-normal) var(--fluent-curve-easy-ease);
}

.fluent-metric-card:hover {
    box-shadow: var(--fluent-shadow-4);
    transform: translateY(-2px);
}

.fluent-metric-value {
    font-size: var(--fluent-font-size-title-1);
    font-weight: var(--fluent-font-weight-semibold);
    color: var(--fluent-primary);
    margin: 0;
}

.fluent-metric-label {
    font-size: var(--fluent-font-size-caption);
    color: var(--fluent-text-secondary);
    margin: var(--fluent-spacing-xs) 0 0 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.fluent-metric-change {
    font-size: var(--fluent-font-size-caption);
    margin-top: var(--fluent-spacing-xs);
    font-weight: var(--fluent-font-weight-medium);
}

.fluent-metric-change.positive {
    color: var(--fluent-success);
}

.fluent-metric-change.negative {
    color: var(--fluent-error);
}

.fluent-metric-change.neutral {
    color: var(--fluent-text-tertiary);
}

/* Buttons */
.fluent-button {
    font-family: var(--fluent-font-family);
    font-size: var(--fluent-font-size-body);
    font-weight: var(--fluent-font-weight-medium);
    border: 1px solid transparent;
    border-radius: var(--fluent-border-radius-medium);
    padding: var(--fluent-spacing-s) var(--fluent-spacing-l);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--fluent-spacing-s);
    text-decoration: none;
    transition: all var(--fluent-duration-normal) var(--fluent-curve-easy-ease);
    min-height: 32px;
    outline: none;
    position: relative;
    overflow: hidden;
}

.fluent-button:focus-visible {
    outline: 2px solid var(--fluent-primary);
    outline-offset: 2px;
}

.fluent-button-primary {
    background: var(--fluent-primary);
    color: var(--fluent-text-white);
}

.fluent-button-primary:hover {
    background: var(--fluent-primary-hover);
}

.fluent-button-primary:active {
    background: var(--fluent-primary-pressed);
}

.fluent-button-secondary {
    background: var(--fluent-surface-primary);
    border-color: var(--fluent-surface-stroke);
    color: var(--fluent-text-primary);
}

.fluent-button-secondary:hover {
    background: var(--fluent-bg-secondary);
    border-color: var(--fluent-surface-stroke-flyout);
}

.fluent-button-secondary:active {
    background: var(--fluent-bg-tertiary);
}

.fluent-button-subtle {
    background: transparent;
    color: var(--fluent-text-primary);
}

.fluent-button-subtle:hover {
    background: var(--fluent-bg-secondary);
}

.fluent-button-subtle:active {
    background: var(--fluent-bg-tertiary);
}

/* Input Controls */
.fluent-input {
    font-family: var(--fluent-font-family);
    font-size: var(--fluent-font-size-body);
    background: var(--fluent-surface-primary);
    border: 1px solid var(--fluent-surface-stroke);
    border-radius: var(--fluent-border-radius-medium);
    padding: var(--fluent-spacing-s) var(--fluent-spacing-m);
    color: var(--fluent-text-primary);
    outline: none;
    transition: all var(--fluent-duration-normal) var(--fluent-curve-easy-ease);
    min-height: 32px;
}

.fluent-input:focus {
    border-color: var(--fluent-primary);
    box-shadow: 0 0 0 1px var(--fluent-primary);
}

.fluent-input::placeholder {
    color: var(--fluent-text-tertiary);
}

.fluent-select {
    font-family: var(--fluent-font-family);
    font-size: var(--fluent-font-size-body);
    background: var(--fluent-surface-primary);
    border: 1px solid var(--fluent-surface-stroke);
    border-radius: var(--fluent-border-radius-medium);
    padding: var(--fluent-spacing-s) var(--fluent-spacing-m);
    color: var(--fluent-text-primary);
    outline: none;
    transition: all var(--fluent-duration-normal) var(--fluent-curve-easy-ease);
    min-height: 32px;
    cursor: pointer;
}

.fluent-select:focus {
    border-color: var(--fluent-primary);
    box-shadow: 0 0 0 1px var(--fluent-primary);
}

/* Tables */
.fluent-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--fluent-surface-primary);
    border-radius: var(--fluent-border-radius-large);
    overflow: hidden;
    box-shadow: var(--fluent-shadow-2);
}

.fluent-table th {
    background: var(--fluent-bg-secondary);
    padding: var(--fluent-spacing-m) var(--fluent-spacing-l);
    text-align: left;
    font-size: var(--fluent-font-size-body);
    font-weight: var(--fluent-font-weight-semibold);
    color: var(--fluent-text-primary);
    border-bottom: 1px solid var(--fluent-surface-stroke);
}

.fluent-table td {
    padding: var(--fluent-spacing-m) var(--fluent-spacing-l);
    border-bottom: 1px solid var(--fluent-surface-stroke);
    color: var(--fluent-text-primary);
    font-size: var(--fluent-font-size-body);
}

.fluent-table tr:hover {
    background: var(--fluent-bg-secondary);
}

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

/* Progress Bar */
.fluent-progress {
    width: 100%;
    height: 4px;
    background: var(--fluent-bg-tertiary);
    border-radius: var(--fluent-border-radius-small);
    overflow: hidden;
}

.fluent-progress-fill {
    height: 100%;
    background: var(--fluent-primary);
    border-radius: var(--fluent-border-radius-small);
    transition: width var(--fluent-duration-gentle) var(--fluent-curve-easy-ease);
}

/* Badge */
.fluent-badge {
    display: inline-flex;
    align-items: center;
    font-size: var(--fluent-font-size-caption);
    font-weight: var(--fluent-font-weight-medium);
    padding: var(--fluent-spacing-xs) var(--fluent-spacing-s);
    border-radius: var(--fluent-border-radius-large);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.fluent-badge-primary {
    background: var(--fluent-primary-light);
    color: var(--fluent-primary);
}

.fluent-badge-success {
    background: rgba(16, 124, 16, 0.1);
    color: var(--fluent-success);
}

.fluent-badge-warning {
    background: rgba(255, 185, 0, 0.1);
    color: var(--fluent-warning);
}

.fluent-badge-error {
    background: rgba(209, 52, 56, 0.1);
    color: var(--fluent-error);
}

/* Alert */
.fluent-alert {
    background: var(--fluent-surface-primary);
    border: 1px solid var(--fluent-surface-stroke);
    border-radius: var(--fluent-border-radius-large);
    padding: var(--fluent-spacing-l);
    margin: var(--fluent-spacing-l) 0;
    display: flex;
    align-items: flex-start;
    gap: var(--fluent-spacing-m);
}

.fluent-alert-info {
    border-left: 4px solid var(--fluent-info);
    background: rgba(0, 120, 212, 0.05);
}

.fluent-alert-success {
    border-left: 4px solid var(--fluent-success);
    background: rgba(16, 124, 16, 0.05);
}

.fluent-alert-warning {
    border-left: 4px solid var(--fluent-warning);
    background: rgba(255, 185, 0, 0.05);
}

.fluent-alert-error {
    border-left: 4px solid var(--fluent-error);
    background: rgba(209, 52, 56, 0.05);
}

/* Bootstrap Compatibility - Bootstrap class mappings to Fluent Design */

/* Container System */
.container, .container-fluid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--fluent-spacing-l);
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(-1 * var(--fluent-spacing-s));
}

.col, .col-md-6, .col-md-4, .col-md-8, .col-md-12 {
    flex: 1;
    padding: 0 var(--fluent-spacing-s);
}

.col-md-6 {
    flex: 0 0 50%;
    max-width: 50%;
}

.col-md-4 {
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
}

.col-md-8 {
    flex: 0 0 66.666667%;
    max-width: 66.666667%;
}

.col-md-12 {
    flex: 0 0 100%;
    max-width: 100%;
}

/* Cards */
.card {
    background: var(--fluent-surface-primary);
    border: 1px solid var(--fluent-surface-stroke);
    border-radius: var(--fluent-border-radius-large);
    box-shadow: var(--fluent-shadow-2);
    margin-bottom: var(--fluent-spacing-l);
    overflow: hidden;
}

.card-header {
    background: var(--fluent-bg-secondary);
    border-bottom: 1px solid var(--fluent-surface-stroke);
    padding: var(--fluent-spacing-l);
    font-weight: var(--fluent-font-weight-semibold);
}

.card-header.bg-primary {
    background: var(--fluent-primary) !important;
    color: var(--fluent-text-white) !important;
    border-bottom-color: var(--fluent-primary);
}

.card-body {
    padding: var(--fluent-spacing-l);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--fluent-font-family);
    font-size: var(--fluent-font-size-body);
    font-weight: var(--fluent-font-weight-medium);
    padding: var(--fluent-spacing-s) var(--fluent-spacing-l);
    border: 1px solid transparent;
    border-radius: var(--fluent-border-radius-medium);
    cursor: pointer;
    transition: all var(--fluent-duration-normal) var(--fluent-curve-easy-ease);
    text-decoration: none;
    min-height: 32px;
    gap: var(--fluent-spacing-xs);
}

.btn-primary {
    background: var(--fluent-primary);
    color: var(--fluent-text-white);
    border-color: var(--fluent-primary);
}

.btn-primary:hover {
    background: var(--fluent-primary-hover);
    border-color: var(--fluent-primary-hover);
    color: var(--fluent-text-white);
}

.btn-success {
    background: var(--fluent-success);
    color: var(--fluent-text-white);
    border-color: var(--fluent-success);
}

.btn-outline-secondary {
    background: transparent;
    color: var(--fluent-text-secondary);
    border-color: var(--fluent-surface-stroke);
}

.btn-outline-secondary:hover {
    background: var(--fluent-bg-secondary);
    color: var(--fluent-text-primary);
}

/* Form Controls */
.form-control, .form-select {
    font-family: var(--fluent-font-family);
    font-size: var(--fluent-font-size-body);
    background: var(--fluent-surface-primary);
    border: 1px solid var(--fluent-surface-stroke);
    border-radius: var(--fluent-border-radius-medium);
    padding: var(--fluent-spacing-s) var(--fluent-spacing-m);
    color: var(--fluent-text-primary);
    outline: none;
    transition: all var(--fluent-duration-normal) var(--fluent-curve-easy-ease);
    min-height: 32px;
    width: 100%;
}

.form-control:focus, .form-select:focus {
    border-color: var(--fluent-primary);
    box-shadow: 0 0 0 1px var(--fluent-primary);
}

.form-control::placeholder {
    color: var(--fluent-text-tertiary);
}

/* Input Groups */
.input-group {
    display: flex;
    width: 100%;
}

.input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: 0;
}

.input-group .btn {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* List Groups */
.list-group {
    background: var(--fluent-surface-primary);
    border-radius: var(--fluent-border-radius-large);
    border: 1px solid var(--fluent-surface-stroke);
    overflow: hidden;
}

.list-group-item {
    background: var(--fluent-surface-primary);
    border: none;
    border-bottom: 1px solid var(--fluent-surface-stroke);
    padding: var(--fluent-spacing-m) var(--fluent-spacing-l);
    color: var(--fluent-text-primary);
    transition: all var(--fluent-duration-normal) var(--fluent-curve-easy-ease);
}

.list-group-item:last-child {
    border-bottom: none;
}

.list-group-item:hover {
    background: var(--fluent-bg-secondary);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    font-size: var(--fluent-font-size-caption);
    font-weight: var(--fluent-font-weight-medium);
    padding: var(--fluent-spacing-xs) var(--fluent-spacing-s);
    border-radius: var(--fluent-border-radius-large);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge.bg-primary, .bg-primary {
    background: var(--fluent-primary) !important;
    color: var(--fluent-text-white) !important;
}

/* Alerts */
.alert {
    background: var(--fluent-surface-primary);
    border: 1px solid var(--fluent-surface-stroke);
    border-radius: var(--fluent-border-radius-large);
    padding: var(--fluent-spacing-l);
    margin: var(--fluent-spacing-l) 0;
    display: flex;
    align-items: flex-start;
    gap: var(--fluent-spacing-m);
}

.alert-info {
    border-left: 4px solid var(--fluent-info);
    background: rgba(0, 120, 212, 0.05);
}

/* Spacing utilities */
.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--fluent-spacing-xs) !important; }
.mb-2 { margin-bottom: var(--fluent-spacing-s) !important; }
.mb-3 { margin-bottom: var(--fluent-spacing-m) !important; }
.mb-4 { margin-bottom: var(--fluent-spacing-l) !important; }
.mb-5 { margin-bottom: var(--fluent-spacing-2xl) !important; }

.mt-2 { margin-top: var(--fluent-spacing-s) !important; }
.mt-3 { margin-top: var(--fluent-spacing-m) !important; }

.py-5 { padding-top: var(--fluent-spacing-2xl) !important; padding-bottom: var(--fluent-spacing-2xl) !important; }

/* Display utilities */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

.justify-content-between { justify-content: space-between !important; }
.align-items-center { align-items: center !important; }

.text-center { text-align: center !important; }
.text-muted { color: var(--fluent-text-tertiary) !important; }
.text-white { color: var(--fluent-text-white) !important; }

/* Gap utilities */
.gap-2 { gap: var(--fluent-spacing-s) !important; }

/* Typography */
h1, .h1 { font-size: var(--fluent-font-size-title-1); font-weight: var(--fluent-font-weight-semibold); margin-bottom: var(--fluent-spacing-l); }
h3, .h3 { font-size: var(--fluent-font-size-title-3); font-weight: var(--fluent-font-weight-semibold); margin-bottom: var(--fluent-spacing-m); }
h4, .h4 { font-size: var(--fluent-font-size-subtitle); font-weight: var(--fluent-font-weight-semibold); margin-bottom: var(--fluent-spacing-m); }
h5, .h5 { font-size: var(--fluent-font-size-body); font-weight: var(--fluent-font-weight-semibold); margin-bottom: var(--fluent-spacing-s); }

small, .small { font-size: var(--fluent-font-size-caption); color: var(--fluent-text-secondary); }

/* Responsive Design */
@media (max-width: 768px) {
    .fluent-container {
        padding: 0 var(--fluent-spacing-m);
    }
    
    .container {
        padding: 0 var(--fluent-spacing-m);
    }
    
    .fluent-command-bar {
        height: 44px;
        padding: 0 var(--fluent-spacing-m);
    }
    
    .fluent-command-bar-nav {
        gap: var(--fluent-spacing-m);
    }
    
    .fluent-grid {
        grid-template-columns: 1fr;
        gap: var(--fluent-spacing-m);
    }
    
    .fluent-card, .card {
        padding: var(--fluent-spacing-m);
    }
    
    .fluent-table {
        font-size: var(--fluent-font-size-caption);
    }
    
    .fluent-table th,
    .fluent-table td {
        padding: var(--fluent-spacing-s) var(--fluent-spacing-m);
    }
    
    .col-md-6, .col-md-4, .col-md-8, .col-md-12 {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .fluent-container {
        padding: 0 var(--fluent-spacing-s);
    }
    
    .fluent-command-bar {
        padding: 0 var(--fluent-spacing-s);
    }
    
    .fluent-flex,
    .fluent-flex-column {
        gap: var(--fluent-spacing-s);
    }
    
    .fluent-grid {
        gap: var(--fluent-spacing-s);
    }
}

/* Hover Effects (Fluent Reveal) */
@media (hover: hover) {
    .fluent-reveal {
        position: relative;
        overflow: hidden;
    }
    
    .fluent-reveal::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.1) 0%, transparent 50%);
        opacity: 0;
        transition: opacity var(--fluent-duration-fast) var(--fluent-curve-easy-ease);
        pointer-events: none;
    }
    
    .fluent-reveal:hover::before {
        opacity: 1;
    }
}

/* Print Styles */
@media print {
    .fluent-theme {
        background: white;
        color: black;
    }
    
    .fluent-command-bar {
        display: none;
    }
    
    .fluent-card {
        border: 1px solid #ccc;
        box-shadow: none;
        break-inside: avoid;
    }
    
    .fluent-table {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .fluent-button {
        display: none;
    }
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* === Theme Selector Dropdown === */
.dropdown {
    display: inline-block !important;
    position: relative !important;
}

.dropdown-toggle {
    background: none !important;
    border: 1px solid var(--fluent-stroke-primary) !important;
    border-radius: var(--fluent-border-radius-m) !important;
    padding: 8px 12px !important;
    color: var(--fluent-text-primary) !important;
    font-size: 14px !important;
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    cursor: pointer !important;
}

.dropdown-toggle:hover {
    background-color: var(--fluent-bg-subtle-hover) !important;
}

.dropdown-menu {
    background-color: var(--fluent-bg-primary) !important;
    border: 1px solid var(--fluent-stroke-primary) !important;
    border-radius: var(--fluent-border-radius-m) !important;
    box-shadow: var(--fluent-shadow-16) !important;
    padding: 4px !important;
    min-width: 200px !important;
    z-index: 1000 !important;
}

.dropdown-item {
    padding: 8px 12px !important;
    color: var(--fluent-text-primary) !important;
    text-decoration: none !important;
    border-radius: var(--fluent-border-radius-s) !important;
    display: block !important;
}

.dropdown-item:hover {
    background-color: var(--fluent-bg-subtle-hover) !important;
    color: var(--fluent-text-primary) !important;
}

.theme-name {
    font-weight: 500;
}