/* ==========================================================================
   Microsoft Fluent 2 Design System for Microsoft QR Studio
   Inspired by Microsoft 365, Windows 11 & Copilot Studio
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Segoe+UI:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,600&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
    /* Microsoft Brand Palette */
    --fluent-primary: #0078d4;
    --fluent-primary-hover: #106ebe;
    --fluent-primary-active: #005a9e;
    --fluent-primary-gradient: linear-gradient(135deg, #0078d4 0%, #005a9e 100%);
    --fluent-primary-tint: #eff6fc;
    --fluent-primary-dark: #004578;
    
    /* Fluent Accent Colors */
    --fluent-accent-blue: #0f6cbd;
    --fluent-accent-teal: #008272;
    --fluent-accent-green: #107c41;
    --fluent-accent-orange: #d83b01;
    --fluent-accent-purple: #6264a7;
    --fluent-accent-magenta: #b4009e;
    --fluent-accent-yellow: #ffb900;
    
    /* Light Theme (Default) */
    --fluent-bg-app: #f4f6f9;
    --fluent-bg-mesh: radial-gradient(at 0% 0%, rgba(0, 120, 212, 0.07) 0px, transparent 50%),
                      radial-gradient(at 100% 0%, rgba(98, 100, 167, 0.06) 0px, transparent 50%),
                      radial-gradient(at 50% 100%, rgba(16, 124, 65, 0.05) 0px, transparent 50%);
    --fluent-bg-card: rgba(255, 255, 255, 0.92);
    --fluent-bg-card-hover: #ffffff;
    --fluent-bg-subtle: #f8fafc;
    --fluent-bg-input: #f8fafc;
    --fluent-bg-input-hover: #f1f5f9;
    --fluent-bg-input-focus: #ffffff;
    --fluent-bg-acrylic: rgba(255, 255, 255, 0.85);
    
    --fluent-border-subtle: rgba(226, 232, 240, 0.8);
    --fluent-border-default: #e2e8f0;
    --fluent-border-strong: #cbd5e1;
    --fluent-border-interactive: #0078d4;
    
    --fluent-text-primary: #1e293b;
    --fluent-text-secondary: #475569;
    --fluent-text-subtle: #64748b;
    --fluent-text-disabled: #94a3b8;
    --fluent-text-on-accent: #ffffff;
    
    /* Ultra-Soft Atmospheric Multi-layer Shadows */
    --fluent-shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
    --fluent-shadow-sm: 0 2px 4px -1px rgba(15, 23, 42, 0.04), 0 1px 2px -1px rgba(15, 23, 42, 0.03);
    --fluent-shadow-md: 0 8px 16px -4px rgba(15, 23, 42, 0.06), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
    --fluent-shadow-lg: 0 16px 32px -6px rgba(15, 23, 42, 0.08), 0 8px 16px -4px rgba(15, 23, 42, 0.04);
    --fluent-shadow-xl: 0 24px 48px -12px rgba(15, 23, 42, 0.12), 0 12px 24px -6px rgba(15, 23, 42, 0.06);
    --fluent-shadow-glow: 0 8px 24px rgba(0, 120, 212, 0.28);
    
    /* Modern Rounded Radiuses */
    --fluent-radius-xs: 6px;
    --fluent-radius-sm: 8px;
    --fluent-radius-md: 12px;
    --fluent-radius-lg: 16px;
    --fluent-radius-xl: 22px;
    --fluent-radius-pill: 9999px;
    
    --fluent-transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
    --fluent-font-family: 'Segoe UI', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --fluent-bg-app: #0f172a;
    --fluent-bg-mesh: radial-gradient(at 0% 0%, rgba(0, 120, 212, 0.15) 0px, transparent 50%),
                      radial-gradient(at 100% 0%, rgba(98, 100, 167, 0.12) 0px, transparent 50%),
                      radial-gradient(at 50% 100%, rgba(16, 124, 65, 0.10) 0px, transparent 50%);
    --fluent-bg-card: rgba(30, 41, 59, 0.88);
    --fluent-bg-card-hover: rgba(30, 41, 59, 0.98);
    --fluent-bg-subtle: #1e293b;
    --fluent-bg-input: #1e293b;
    --fluent-bg-input-hover: #334155;
    --fluent-bg-input-focus: #0f172a;
    --fluent-bg-acrylic: rgba(15, 23, 42, 0.85);
    
    --fluent-border-subtle: rgba(51, 65, 85, 0.7);
    --fluent-border-default: #334155;
    --fluent-border-strong: #475569;
    --fluent-border-interactive: #38bdf8;
    
    --fluent-text-primary: #f8fafc;
    --fluent-text-secondary: #cbd5e1;
    --fluent-text-subtle: #94a3b8;
    --fluent-text-disabled: #64748b;
    
    --fluent-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --fluent-shadow-sm: 0 2px 4px -1px rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.3);
    --fluent-shadow-md: 0 8px 16px -4px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --fluent-shadow-lg: 0 16px 32px -6px rgba(0, 0, 0, 0.6), 0 8px 16px -4px rgba(0, 0, 0, 0.5);
    --fluent-shadow-xl: 0 24px 48px -12px rgba(0, 0, 0, 0.7), 0 12px 24px -6px rgba(0, 0, 0, 0.6);
    --fluent-shadow-glow: 0 8px 24px rgba(56, 189, 248, 0.35);
    
    --fluent-primary-tint: #1e3a5f;
}

/* ==========================================================================
   Base & Global Styles
   ========================================================================== */
html, body {
    font-family: var(--fluent-font-family);
    background-color: var(--fluent-bg-app);
    background-image: var(--fluent-bg-mesh);
    background-attachment: fixed;
    color: var(--fluent-text-primary);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* Container & Spacing */
.container {
    max-width: 1240px;
}

/* ==========================================================================
   1. TDMU Fluent Suite Bar / Top Navigation
   ========================================================================== */
.fluent-suite-bar {
    background: var(--fluent-bg-acrylic);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--fluent-border-subtle);
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 1030;
    transition: var(--fluent-transition);
    display: flex;
    align-items: center;
}

.fluent-suite-bar > .container-fluid {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.fluent-brand-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 100%;
}

.fluent-brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    height: 100%;
    text-decoration: none;
    line-height: 1;
    transition: var(--fluent-transition);
}

.fluent-brand-logo:hover {
    text-decoration: none;
}

.fluent-tdmu-logo {
    height: 40px;
    width: auto;
    max-width: 160px;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.08));
    transition: transform 0.2s cubic-bezier(0.33, 1, 0.68, 1);
}

.fluent-brand-logo:hover .fluent-tdmu-logo {
    transform: scale(1.03);
}

[data-theme="dark"] .fluent-tdmu-logo,
[data-bs-theme="dark"] .fluent-tdmu-logo {
    filter: brightness(0) invert(1) drop-shadow(0 2px 6px rgba(255, 255, 255, 0.35));
}

.fluent-brand-title {
    font-family: 'Plus Jakarta Sans', var(--fluent-font-family);
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    display: inline-flex;
    align-items: center;
    line-height: 1;
    color: #003b7a;
    background: linear-gradient(135deg, #003366 0%, #00509d 55%, #0078d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    border-left: 2px solid var(--fluent-border-default);
    padding-left: 14px;
    height: 28px;
    transition: var(--fluent-transition);
}

[data-theme="dark"] .fluent-brand-title,
[data-bs-theme="dark"] .fluent-brand-title {
    color: #ffffff !important;
    background: none !important;
    -webkit-background-clip: initial !important;
    -webkit-text-fill-color: #ffffff !important;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.4), 0 1px 3px rgba(0, 0, 0, 0.8);
    border-left-color: rgba(255, 255, 255, 0.3);
}

.fluent-command-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 100%;
}

.fluent-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 0 14px;
    height: 38px;
    line-height: 1;
    border-radius: var(--fluent-radius-pill);
    border: 1px solid var(--fluent-border-default);
    background: var(--fluent-bg-card);
    color: var(--fluent-text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--fluent-transition);
    box-shadow: var(--fluent-shadow-xs);
    vertical-align: middle;
}

.fluent-action-btn:hover {
    background: var(--fluent-bg-subtle);
    border-color: var(--fluent-border-strong);
    color: var(--fluent-text-primary);
    transform: translateY(-1px);
    box-shadow: var(--fluent-shadow-sm);
}

.fluent-btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    line-height: 1;
    font-size: 0.95rem;
    vertical-align: middle;
}

.fluent-btn-icon i.fa {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    vertical-align: middle;
    margin: 0;
    padding: 0;
}

.fluent-btn-label {
    display: inline-flex;
    align-items: center;
    line-height: 1;
    vertical-align: middle;
}

.fluent-action-btn.dropdown-toggle::after {
    display: inline-block;
    margin-left: 6px;
    vertical-align: middle;
    position: relative;
    top: 1px;
}

/* ==========================================================================
   2. Fluent Hero Header & Feature Showcase
   ========================================================================== */
.fluent-hero-header {
    padding: 24px 0 20px 0;
}

.fluent-hero-inner {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.fluent-hero-title {
    font-family: 'Plus Jakarta Sans', var(--fluent-font-family);
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--fluent-text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.fluent-hero-subtitle {
    font-size: 1rem;
    color: var(--fluent-text-secondary);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    line-height: 1.45;
}

.fluent-hero-desc-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    background: rgba(16, 124, 65, 0.1);
    color: #107c41;
    border: 1px solid rgba(16, 124, 65, 0.25);
    border-radius: var(--fluent-radius-pill);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

[data-theme="dark"] .fluent-hero-desc-badge {
    background: rgba(16, 124, 65, 0.2);
    color: #4ade80;
    border-color: rgba(74, 222, 128, 0.3);
}

/* Feature Showcase Strip (Single compact line) */
.fluent-feature-line {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 10px;
    margin-top: 8px;
    width: 100%;
}

.fluent-chip-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--fluent-bg-card);
    border: 1px solid var(--fluent-border-subtle);
    border-radius: var(--fluent-radius-pill);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--fluent-text-secondary);
    box-shadow: var(--fluent-shadow-xs);
    transition: var(--fluent-transition);
}

.fluent-chip-item:hover {
    background: var(--fluent-bg-subtle);
    color: var(--fluent-primary);
    border-color: var(--fluent-primary);
    transform: translateY(-1px);
}

.fluent-chip-item i {
    font-size: 0.82rem;
}

/* ==========================================================================
   3. Modern Step Section Header
   ========================================================================== */
.fluent-fullwidth-step {
    width: 100%;
}

.fluent-step-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.fluent-step-badge {
    width: 26px;
    height: 26px;
    border-radius: var(--fluent-radius-pill);
    background: var(--fluent-primary);
    color: #ffffff;
    font-size: 0.82rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 120, 212, 0.35);
}

.fluent-step-title {
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--fluent-text-primary);
    margin: 0;
    letter-spacing: -0.01em;
}

/* ==========================================================================
   4. Fluent Pivot Navigation (Full-width Self-stretching Responsive Grid)
   ========================================================================== */
.fluent-pivot-container {
    background: var(--fluent-bg-card);
    border: 1px solid var(--fluent-border-subtle);
    border-radius: var(--fluent-radius-lg);
    padding: 10px;
    box-shadow: var(--fluent-shadow-sm);
    margin-bottom: 16px;
    width: 100%;
}

.fluent-pivot-fullwidth {
    width: 100%;
}

.fluent-pivot-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
    width: 100%;
}

.fluent-pivot-grid .nav-item {
    margin: 0;
    flex: 1 1 110px;
    min-width: 100px;
    max-width: 100%;
}

.fluent-pivot-grid .nav-link {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 6px;
    border-radius: var(--fluent-radius-md);
    color: var(--fluent-text-secondary);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid var(--fluent-border-subtle);
    background: var(--fluent-bg-subtle);
    transition: var(--fluent-transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
    text-align: center;
}

.fluent-pivot-grid .nav-link span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.fluent-pivot-grid .nav-link i {
    font-size: 0.95rem;
    color: var(--fluent-primary);
    flex-shrink: 0;
    transition: var(--fluent-transition);
}

.fluent-pivot-grid .nav-link:hover {
    background: var(--fluent-bg-card);
    color: var(--fluent-primary);
    border-color: var(--fluent-primary);
    transform: translateY(-1px);
    box-shadow: var(--fluent-shadow-xs);
}

.fluent-pivot-grid .nav-link:hover i {
    transform: scale(1.15);
}

.fluent-pivot-grid .nav-link.active {
    background: var(--fluent-primary-gradient) !important;
    color: #ffffff !important;
    border-color: transparent !important;
    box-shadow: var(--fluent-shadow-glow);
    transform: translateY(-1px);
    font-weight: 700;
}

.fluent-pivot-grid .nav-link.active i {
    color: #ffffff !important;
}

/* ==========================================================================
   5. Fluent Cards & Container Panels
   ========================================================================== */
.fluent-card {
    background: var(--fluent-bg-card);
    border: 1px solid var(--fluent-border-subtle);
    border-radius: var(--fluent-radius-lg);
    box-shadow: var(--fluent-shadow-md);
    padding: 20px;
    margin-bottom: 16px;
    transition: var(--fluent-transition);
}

.fluent-card:hover {
    box-shadow: var(--fluent-shadow-lg);
    border-color: var(--fluent-border-default);
}

.fluent-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 14px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--fluent-border-subtle);
}

.fluent-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--fluent-text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.fluent-card-title i {
    color: var(--fluent-primary);
}

/* ==========================================================================
   6. Form Controls & Inputs (Rounded 12px + Focus Ring)
   ========================================================================== */
.form-group {
    margin-bottom: 14px;
}

.form-label, label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--fluent-text-secondary);
    margin-bottom: 6px;
    display: inline-block;
}

.form-control, .form-select {
    background-color: var(--fluent-bg-input);
    border: 1.5px solid var(--fluent-border-default);
    border-radius: var(--fluent-radius-md);
    color: var(--fluent-text-primary);
    font-size: 0.935rem;
    padding: 9px 14px;
    min-height: 42px;
    transition: var(--fluent-transition);
    box-shadow: var(--fluent-shadow-xs);
}

.form-control:hover, .form-select:hover {
    background-color: var(--fluent-bg-input-hover);
    border-color: var(--fluent-border-strong);
}

.form-control:focus, .form-select:focus {
    background-color: var(--fluent-bg-input-focus);
    border-color: var(--fluent-primary);
    color: var(--fluent-text-primary);
    box-shadow: 0 0 0 4px rgba(0, 120, 212, 0.16);
    outline: none;
}

textarea.form-control {
    min-height: 85px;
    border-radius: var(--fluent-radius-md);
}

/* Form Switches */
.form-check-input {
    width: 38px;
    height: 20px;
    background-color: var(--fluent-border-strong);
    border: none;
    border-radius: var(--fluent-radius-pill);
    cursor: pointer;
    transition: var(--fluent-transition);
}

.form-check-input:checked {
    background-color: var(--fluent-primary);
    box-shadow: 0 2px 6px rgba(0, 120, 212, 0.35);
}

.form-check-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--fluent-text-primary);
    cursor: pointer;
    user-select: none;
}

/* Range Slider */
input[type=range] {
    -webkit-appearance: none;
    height: 6px;
    background: var(--fluent-border-default);
    border-radius: var(--fluent-radius-pill);
    outline: none;
    margin: 10px 0;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--fluent-primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 120, 212, 0.4);
    border: 2px solid #ffffff;
    transition: var(--fluent-transition);
}

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

/* ==========================================================================
   7. Fluent Accordion Panels (Rounded 16px Separate Cards)
   ========================================================================== */
.fluent-accordion {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.fluent-accordion .accordion-item {
    background: var(--fluent-bg-card);
    border: 1px solid var(--fluent-border-subtle);
    border-radius: var(--fluent-radius-lg) !important;
    overflow: hidden;
    box-shadow: var(--fluent-shadow-sm);
    transition: var(--fluent-transition);
}

.fluent-accordion .accordion-item:hover {
    border-color: var(--fluent-border-default);
    box-shadow: var(--fluent-shadow-md);
}

.fluent-accordion .accordion-button {
    background: var(--fluent-bg-card);
    color: var(--fluent-text-primary);
    font-size: 0.95rem;
    font-weight: 700;
    padding: 14px 18px;
    box-shadow: none;
    border: none;
    border-radius: var(--fluent-radius-lg) !important;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--fluent-transition);
}

.fluent-accordion-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--fluent-radius-md);
    background: var(--fluent-primary-tint);
    color: var(--fluent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    transition: var(--fluent-transition);
    flex-shrink: 0;
}

.fluent-accordion .accordion-button:not(.collapsed) {
    background: var(--fluent-bg-subtle);
    color: var(--fluent-primary);
    border-bottom-left-radius: 0 !important;
    border-bottom-right-radius: 0 !important;
}

.fluent-accordion .accordion-button:not(.collapsed) .fluent-accordion-icon {
    background: var(--fluent-primary);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(0, 120, 212, 0.35);
}

.fluent-accordion .accordion-body {
    background: var(--fluent-bg-card);
    padding: 18px;
    border-top: 1px solid var(--fluent-border-subtle);
}

/* ==========================================================================
   8. Color Swatches & Style Selectors
   ========================================================================== */
.fluent-swatch-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 8px 0 12px 0;
}

.fluent-swatch-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--fluent-radius-pill);
    border: 2px solid var(--fluent-border-default);
    cursor: pointer;
    transition: var(--fluent-transition);
    box-shadow: var(--fluent-shadow-xs);
    position: relative;
}

.fluent-swatch-btn:hover {
    transform: scale(1.18);
    box-shadow: var(--fluent-shadow-md);
    z-index: 2;
}

.fluent-swatch-btn.active {
    border-color: var(--fluent-primary);
    box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.35);
    transform: scale(1.15);
}

/* Custom Marker & Pattern Radios */
.custom-control-inline, .form-check-inline {
    display: inline-flex;
    align-items: center;
    margin-right: 12px;
    margin-bottom: 8px;
}

/* ==========================================================================
   9. Live Preview Studio Canvas (Device Card)
   ========================================================================== */
.fluent-preview-sticky {
    position: sticky;
    top: 76px;
    z-index: 100;
}

.fluent-preview-card {
    background: var(--fluent-bg-acrylic);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1.5px solid var(--fluent-border-subtle);
    border-radius: var(--fluent-radius-xl);
    box-shadow: var(--fluent-shadow-xl);
    padding: 22px;
    transition: var(--fluent-transition);
}

.fluent-preview-card:hover {
    border-color: rgba(0, 120, 212, 0.3);
}

.fluent-preview-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 4px 10px;
    border-radius: var(--fluent-radius-pill);
    background: rgba(16, 124, 65, 0.12);
    color: var(--fluent-accent-green);
    font-size: 0.76rem;
    font-weight: 700;
    border: 1px solid rgba(16, 124, 65, 0.2);
}

.fluent-preview-badge .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--fluent-accent-green);
    box-shadow: 0 0 8px var(--fluent-accent-green);
    animation: pulse-live 1.8s infinite;
}

@keyframes pulse-live {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.3); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

.fluent-qr-stage {
    background: #ffffff;
    border-radius: var(--fluent-radius-lg);
    border: 1px solid var(--fluent-border-subtle);
    padding: 16px;
    margin: 14px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.03);
    position: relative;
}

.fluent-qr-stage img, .fluent-qr-stage svg {
    max-width: 100%;
    height: auto;
    border-radius: var(--fluent-radius-sm);
    transition: var(--fluent-transition);
}

/* Primary Action Button (Gradient + Elevation + Rounded 12px) */
.btn-fluent-primary {
    width: 100%;
    padding: 12px 20px;
    border-radius: var(--fluent-radius-md);
    background: var(--fluent-primary-gradient);
    color: #ffffff;
    border: none;
    font-size: 0.95rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    cursor: pointer;
    transition: var(--fluent-transition);
    box-shadow: var(--fluent-shadow-glow);
}

.btn-fluent-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(0, 120, 212, 0.45);
    color: #ffffff;
}

.btn-fluent-primary:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    box-shadow: none;
}

/* Secondary Action Buttons Grid */
.fluent-export-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 10px;
}

.btn-fluent-secondary {
    padding: 9px 14px;
    border-radius: var(--fluent-radius-md);
    background: var(--fluent-bg-card);
    border: 1px solid var(--fluent-border-default);
    color: var(--fluent-text-secondary);
    font-size: 0.84rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    transition: var(--fluent-transition);
    box-shadow: var(--fluent-shadow-xs);
}

.btn-fluent-secondary:hover {
    background: var(--fluent-bg-subtle);
    border-color: var(--fluent-border-strong);
    color: var(--fluent-text-primary);
    transform: translateY(-1px);
    box-shadow: var(--fluent-shadow-sm);
}

/* Download Link Badges */
.linksholder {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
}

/* ==========================================================================
   9. Modern Export Formats & Action Links
   ========================================================================== */
.fluent-export-box {
    background: var(--fluent-bg-subtle);
    border: 1px solid var(--fluent-border-default);
    border-radius: var(--fluent-radius-md);
    box-shadow: var(--fluent-shadow-xs);
    animation: fluentFadeIn 0.3s ease-out;
}

.fluent-export-header-title {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--fluent-text-primary);
    letter-spacing: 0.01em;
}

.fluent-format-item {
    background: var(--fluent-bg-card) !important;
    border: 1px solid var(--fluent-border-subtle) !important;
    border-radius: var(--fluent-radius-sm) !important;
    padding: 10px 12px !important;
    transition: var(--fluent-transition);
}

.fluent-format-item:hover {
    border-color: var(--fluent-primary) !important;
    box-shadow: var(--fluent-shadow-sm);
    transform: translateY(-1px);
}

.fluent-format-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 4px 8px;
    border-radius: 6px;
    letter-spacing: 0.04em;
    min-width: 44px;
}

.badge-png {
    background: rgba(0, 120, 212, 0.12);
    color: #0078d4;
    border: 1px solid rgba(0, 120, 212, 0.25);
}

.badge-svg {
    background: rgba(16, 124, 65, 0.12);
    color: #107c41;
    border: 1px solid rgba(16, 124, 65, 0.25);
}

.badge-pdf {
    background: rgba(216, 59, 1, 0.12);
    color: #d83b01;
    border: 1px solid rgba(216, 59, 1, 0.25);
}

.fluent-format-name {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--fluent-text-primary);
    line-height: 1.2;
}

.fluent-format-desc {
    font-size: 0.7rem;
    color: var(--fluent-text-secondary);
    margin-top: 2px;
}

.btn-fluent-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.76rem;
    font-weight: 700;
    padding: 6px 12px;
    border-radius: var(--fluent-radius-pill);
    background: var(--fluent-primary);
    color: #ffffff !important;
    border: none;
    text-decoration: none !important;
    transition: var(--fluent-transition);
    box-shadow: 0 2px 6px rgba(0, 120, 212, 0.25);
    white-space: nowrap;
}

.btn-fluent-action:hover {
    background: var(--fluent-primary-hover);
    color: #ffffff !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 120, 212, 0.35);
}

/* Sidebar Tips Card */
.fluent-tips-card {
    background: var(--fluent-bg-card);
    border: 1px solid var(--fluent-border-subtle);
    border-radius: var(--fluent-radius-lg);
    box-shadow: var(--fluent-shadow-sm);
    padding: 16px 18px;
    margin-top: 16px;
    transition: var(--fluent-transition);
}

.fluent-tips-card:hover {
    border-color: var(--fluent-border-default);
    box-shadow: var(--fluent-shadow-md);
}

.fluent-tips-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--fluent-text-primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--fluent-border-subtle);
}

.fluent-tips-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-column: column;
    gap: 8px;
}

.fluent-tips-list li {
    font-size: 0.78rem;
    color: var(--fluent-text-secondary);
    line-height: 1.45;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.fluent-tips-list li i {
    margin-top: 3px;
    flex-shrink: 0;
}

/* ==========================================================================
   10. Toast Notification
   ========================================================================== */
.alert_placeholder.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 10000;
    min-width: 320px;
    border-radius: var(--fluent-radius-lg);
    background: var(--fluent-bg-card);
    border: 1px solid var(--fluent-border-default);
    box-shadow: var(--fluent-shadow-xl);
    backdrop-filter: blur(16px);
}

.toast-header {
    background: transparent;
    border-bottom: 1px solid var(--fluent-border-subtle);
    padding: 10px 14px;
    font-weight: 600;
    color: var(--fluent-text-primary);
}

.toast-body {
    padding: 12px 14px;
    font-size: 0.88rem;
    color: var(--fluent-text-secondary);
}

/* ==========================================================================
   11. Footer
   ========================================================================== */
.fluent-footer {
    border-top: 1px solid var(--fluent-border-subtle);
    padding: 28px 0;
    margin-top: 50px;
    background: var(--fluent-bg-card);
    transition: var(--fluent-transition);
}

.fluent-footer-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 6px 12px;
}

.fluent-footer-logo-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    flex-shrink: 0;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), filter 0.25s ease;
}

.fluent-footer-logo-link:hover {
    transform: translateY(-1px) scale(1.02);
}

.fluent-footer-logo {
    height: 48px;
    width: auto;
    max-width: 170px;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 2px 4px rgba(0, 51, 102, 0.08));
    transition: var(--fluent-transition);
}

[data-bs-theme="dark"] .fluent-footer-logo,
[data-theme="dark"] .fluent-footer-logo {
    filter: brightness(0) invert(1) drop-shadow(0 2px 6px rgba(255, 255, 255, 0.35)) !important;
}

.fluent-footer-divider {
    width: 1.5px;
    height: 44px;
    background: var(--fluent-border-default);
    border-radius: 2px;
    flex-shrink: 0;
    opacity: 0.8;
}

.fluent-footer-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: left;
    gap: 4px;
}

.fluent-footer-title {
    font-size: 0.94rem;
    font-weight: 500;
    color: var(--fluent-text-primary);
    line-height: 1.35;
    letter-spacing: 0;
    white-space: nowrap;
}

.fluent-footer-brand-name {
    font-weight: 700;
    color: #003366;
    letter-spacing: 0;
}

[data-bs-theme="dark"] .fluent-footer-brand-name,
[data-theme="dark"] .fluent-footer-brand-name {
    color: #ffffff !important;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.4);
}

.fluent-footer-credit {
    font-size: 0.911rem;
    font-weight: 500;
    color: var(--fluent-text-secondary);
    line-height: 1.35;
    letter-spacing: 0;
    word-spacing: 0;
    white-space: nowrap;
}

.fluent-footer-author {
    font-weight: 700;
    color: var(--fluent-primary);
}

[data-bs-theme="dark"] .fluent-footer-author,
[data-theme="dark"] .fluent-footer-author {
    color: #93c5fd;
}

.fluent-footer a {
    color: var(--fluent-text-secondary);
    text-decoration: none;
    transition: var(--fluent-transition);
}

.fluent-footer a:hover {
    color: var(--fluent-primary);
}

.fluent-footer-coffee-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 0.825rem;
    font-weight: 600;
    color: var(--fluent-text-primary) !important;
    background: rgba(255, 185, 0, 0.12);
    border: 1px solid rgba(255, 185, 0, 0.28);
    border-radius: var(--fluent-radius-pill);
    transition: var(--fluent-transition);
    text-decoration: none !important;
}

.fluent-footer-coffee-badge:hover {
    background: rgba(255, 185, 0, 0.22);
    border-color: rgba(255, 185, 0, 0.45);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(255, 185, 0, 0.2);
}

@media (max-width: 640px) {
    .fluent-footer-wrapper {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }

    .fluent-footer-divider {
        width: 60px;
        height: 1.5px;
        margin: 2px auto;
    }

    .fluent-footer-text {
        text-align: center;
        align-items: center;
    }

    .fluent-footer-title,
    .fluent-footer-credit {
        white-space: normal;
        padding: 0 10px;
    }
}

/* ==========================================================================
   11. Microsoft Fluent Confirmation Modal
   ========================================================================== */
.fluent-modal-card {
    border-radius: var(--fluent-radius-lg) !important;
    background: var(--fluent-bg-card) !important;
    color: var(--fluent-text-primary) !important;
    border: 1px solid var(--fluent-border-subtle) !important;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.18) !important;
    backdrop-filter: blur(20px);
}

.fluent-confirm-icon-holder {
    width: 38px;
    height: 38px;
    min-width: 38px;
    border-radius: var(--fluent-radius-pill);
    background: rgba(225, 33, 40, 0.1);
    color: #e12128;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

[data-theme="dark"] .fluent-modal-card {
    background: #1f1f1f !important;
    border-color: rgba(255, 255, 255, 0.12) !important;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6) !important;
}

[data-theme="dark"] .fluent-confirm-icon-holder {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

/* ==========================================================================
   12. Buy Me A Coffee (Donate Page) Styles
   ========================================================================== */
.fluent-btn-coffee {
    background: rgba(255, 185, 0, 0.12) !important;
    border: 1px solid rgba(255, 185, 0, 0.3) !important;
    color: var(--fluent-text-primary) !important;
    text-decoration: none !important;
}
.fluent-btn-coffee:hover,
.fluent-btn-coffee:focus,
.fluent-btn-coffee:active {
    background: rgba(255, 185, 0, 0.25) !important;
    border-color: rgba(255, 185, 0, 0.5) !important;
    text-decoration: none !important;
    color: var(--fluent-text-primary) !important;
}

.fluent-donate-hero {
    background: linear-gradient(135deg, rgba(0, 120, 212, 0.08) 0%, rgba(255, 185, 0, 0.12) 100%);
    border: 1px solid var(--fluent-border-subtle);
}

.fluent-donate-icon-wrapper {
    width: 64px;
    height: 64px;
    background: var(--fluent-bg-card);
    border: 2px solid var(--fluent-border-subtle);
}

.fluent-coffee-card {
    transition: all 0.2s ease-in-out;
    border-width: 2px;
}
.fluent-coffee-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--fluent-shadow-md);
}
.fluent-coffee-card.active {
    background-color: rgba(0, 120, 212, 0.1) !important;
    border-color: var(--fluent-primary) !important;
    color: var(--fluent-primary) !important;
}

[data-theme="dark"] .fluent-donate-hero {
    background: linear-gradient(135deg, rgba(0, 120, 212, 0.18) 0%, rgba(255, 185, 0, 0.18) 100%);
}
[data-theme="dark"] .fluent-coffee-card.active {
    background-color: rgba(0, 120, 212, 0.25) !important;
    border-color: #38daf6 !important;
    color: #38daf6 !important;
}
[data-theme="dark"] .fluent-donate-container .card {
    background-color: var(--fluent-bg-card);
    border-color: var(--fluent-border-subtle) !important;
}
[data-theme="dark"] .fluent-donate-container .bg-light {
    background-color: var(--fluent-bg-subtle) !important;
}
[data-theme="dark"] .fluent-donate-container .bg-white {
    background-color: var(--fluent-bg-input) !important;
}
[data-theme="dark"] .fluent-donate-container .text-dark {
    color: var(--fluent-text-primary) !important;
}
[data-theme="dark"] .fluent-donate-container .text-muted,
[data-theme="dark"] .fluent-donate-container .text-secondary {
    color: var(--fluent-text-secondary) !important;
}
[data-theme="dark"] .fluent-donate-hero .fluent-donate-title {
    color: var(--fluent-text-primary);
}
[data-theme="dark"] .fluent-donate-hero .fluent-donate-subtitle {
    color: var(--fluent-text-secondary) !important;
}
[data-theme="dark"] .fluent-donate-hero .bg-light {
    background-color: var(--fluent-bg-card) !important;
    color: var(--fluent-text-secondary) !important;
    border-color: var(--fluent-border-default) !important;
}
.form-control::placeholder, .form-select::placeholder {
    color: var(--fluent-text-disabled);
}

/* Floating Coffee Action Button (Bottom Right) */
.fluent-floating-coffee-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9990;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--fluent-bg-card);
    color: var(--fluent-text-primary) !important;
    border: 1.5px solid rgba(255, 185, 0, 0.45);
    border-radius: var(--fluent-radius-pill);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(255, 185, 0, 0.25);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none !important;
    backdrop-filter: blur(12px);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.fluent-floating-coffee-btn:hover {
    background: rgba(255, 185, 0, 0.18);
    border-color: rgba(255, 185, 0, 0.7);
    color: var(--fluent-text-primary) !important;
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.16), 0 4px 14px rgba(255, 185, 0, 0.35);
    text-decoration: none !important;
}

.fluent-floating-coffee-btn:active {
    transform: translateY(-1px) scale(0.98);
}

[data-theme="dark"] .fluent-floating-coffee-btn {
    background: #1f1f1f;
    border-color: rgba(255, 185, 0, 0.5);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(255, 185, 0, 0.25);
}

[data-theme="dark"] .fluent-floating-coffee-btn:hover {
    background: rgba(255, 185, 0, 0.25);
    border-color: #ffb900;
}