/**
 * QR Code Studio - Professional SaaS Design System
 * Clean, modern, accessible styling with Light/Dark mode support
 */

:root {
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Primary Accent Palette (Indigo/Violet) */
    --brand-primary: #4f46e5;
    --brand-primary-rgb: 79, 70, 229;
    --brand-primary-hover: #4338ca;
    --brand-primary-subtle: #eef2ff;
    --brand-secondary: #06b6d4;
    --brand-accent: #8b5cf6;

    /* Neutrals - Light Mode */
    --app-bg: #f8fafc;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --qr-stage-bg: #f1f5f9;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.07), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

/* Dark Mode Overrides */
[data-bs-theme="dark"] {
    --brand-primary: #6366f1;
    --brand-primary-rgb: 99, 102, 241;
    --brand-primary-hover: #818cf8;
    --brand-primary-subtle: rgba(99, 102, 241, 0.15);

    --app-bg: #0b0f17;
    --card-bg: #111827;
    --card-border: #1f2937;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --input-bg: #1e293b;
    --input-border: #334155;
    --qr-stage-bg: #0d131f;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

/* Base Elements */
body {
    font-family: var(--font-body);
    background-color: var(--app-bg);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.25s ease, color 0.25s ease;
}

h1, h2, h3, h4, h5, h6, .font-heading {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
}

.extra-small {
    font-size: 0.775rem;
}

.tracking-tight {
    letter-spacing: -0.025em;
}

.tracking-wider {
    letter-spacing: 0.05em;
}

/* Brand styling */
.text-brand {
    color: var(--brand-primary);
    letter-spacing: -0.03em;
}

.brand-logo-badge {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}

.small-badge {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* Header & Nav */
.app-navbar-wrapper {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1030;
}

.app-navbar-wrapper .navbar {
    background-color: rgba(var(--bs-body-bg-rgb), 0.88) !important;
}

.nav-link {
    font-size: 0.925rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.nav-link:hover, .nav-link.active {
    color: var(--brand-primary) !important;
    background-color: var(--brand-primary-subtle);
}

.theme-toggle-btn {
    width: 38px;
    height: 38px;
    border-color: var(--card-border);
}

.theme-toggle-btn:hover {
    background-color: var(--brand-primary-subtle);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

/* Hero Section */
.hero-section {
    position: relative;
    padding: 3.5rem 0 2.5rem;
    overflow: hidden;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.95rem;
    border-radius: 9999px;
    background-color: var(--brand-primary-subtle);
    color: var(--brand-primary);
    font-size: 0.825rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    border: 1px solid rgba(79, 70, 229, 0.15);
}

.hero-title {
    font-size: clamp(2.1rem, 4.5vw, 3.25rem);
    line-height: 1.15;
    margin-bottom: 1.25rem;
}

.hero-gradient-text {
    background: linear-gradient(135deg, var(--brand-primary) 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 620px;
    line-height: 1.6;
}

/* Feature pill badge */
.feature-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* QR Studio Layout */
.qr-studio-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 1.25rem;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* Type Selector Grid */
.type-selector-nav {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(115px, 1fr));
    gap: 0.5rem;
    padding: 0.5rem;
    background-color: var(--qr-stage-bg);
    border-radius: 0.85rem;
    border: 1px solid var(--card-border);
}

.type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 0.35rem;
    border-radius: 0.65rem;
    border: 1px solid transparent;
    background-color: transparent;
    color: var(--text-secondary);
    font-size: 0.775rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.18s ease;
    text-align: center;
    gap: 0.3rem;
    user-select: none;
}

.type-btn i {
    font-size: 1.25rem;
    transition: transform 0.18s ease;
}

.type-btn:hover {
    color: var(--brand-primary);
    background-color: var(--card-bg);
    border-color: var(--card-border);
    transform: translateY(-1px);
}

.type-btn.active {
    background-color: var(--card-bg);
    color: var(--brand-primary);
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-sm);
}

.type-btn.active i {
    transform: scale(1.15);
}

/* Custom Accordion for Controls */
.studio-accordion .accordion-item {
    background-color: transparent;
    border: 1px solid var(--card-border);
    border-radius: 0.85rem !important;
    margin-bottom: 0.85rem;
    overflow: hidden;
}

.studio-accordion .accordion-button {
    background-color: var(--card-bg);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.95rem 1.25rem;
    box-shadow: none;
}

.studio-accordion .accordion-button:not(.collapsed) {
    background-color: var(--brand-primary-subtle);
    color: var(--brand-primary);
}

.studio-accordion .accordion-body {
    background-color: var(--card-bg);
    padding: 1.25rem;
}

/* Color Presets */
.color-swatch-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.color-swatch-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid #ffffff;
    box-shadow: 0 0 0 1px var(--card-border);
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    padding: 0;
}

.color-swatch-btn:hover {
    transform: scale(1.15);
}

.color-swatch-btn.active {
    box-shadow: 0 0 0 2px var(--brand-primary);
    transform: scale(1.1);
}

/* Style Option Radio Buttons (Shapes, Corners) */
.style-option-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(85px, 1fr));
    gap: 0.5rem;
}

.style-option-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 0.35rem;
    border: 1px solid var(--card-border);
    border-radius: 0.65rem;
    background-color: var(--card-bg);
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.18s ease;
    text-align: center;
    gap: 0.25rem;
}

.style-option-label:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

.style-option-input:checked + .style-option-label {
    border-color: var(--brand-primary);
    background-color: var(--brand-primary-subtle);
    color: var(--brand-primary);
    font-weight: 600;
}

.style-icon-preview {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
}

/* Frame Selector Cards */
.frame-option-card {
    border: 1px solid var(--card-border);
    border-radius: 0.65rem;
    padding: 0.6rem 0.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.18s ease;
    background-color: var(--card-bg);
}

.frame-option-card:hover {
    border-color: var(--brand-primary);
}

.frame-option-input:checked + .frame-option-card {
    border-color: var(--brand-primary);
    background-color: var(--brand-primary-subtle);
    color: var(--brand-primary);
}

/* Right Column: Sticky Live Preview */
.sticky-preview-wrapper {
    position: sticky;
    top: 5rem;
    z-index: 10;
}

.preview-stage-container {
    background-color: var(--qr-stage-bg);
    border: 1px dashed var(--card-border);
    border-radius: 1rem;
    padding: 1.75rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 380px;
    position: relative;
    overflow: hidden;
}

/* Frame Container rendered around QR */
.qr-frame-wrapper {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #ffffff;
    border-radius: 1rem;
    padding: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.2s ease;
    max-width: 100%;
}

.qr-frame-top-text, .qr-frame-bottom-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    text-align: center;
    padding: 0.35rem 0.75rem;
}

.qr-frame-wrapper.frame-badge .qr-frame-bottom-text {
    background-color: var(--brand-primary);
    color: #ffffff;
    border-radius: 9999px;
    margin-top: 0.5rem;
    padding: 0.25rem 1rem;
    font-size: 0.8rem;
}

/* QR Canvas DOM element */
#qrPreviewCanvas {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    overflow: hidden;
}

#qrPreviewCanvas canvas, #qrPreviewCanvas svg {
    max-width: 100% !important;
    height: auto !important;
    display: block;
}

/* Scan Reliability & Contrast Bar */
.scan-meter {
    height: 6px;
    border-radius: 9999px;
    background-color: #e2e8f0;
    overflow: hidden;
}

.scan-meter-bar {
    height: 100%;
    transition: width 0.3s ease, background-color 0.3s ease;
}

/* Logo Preset Icons */
.logo-preset-btn {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--card-border);
    border-radius: 0.5rem;
    background-color: var(--card-bg);
    cursor: pointer;
    transition: all 0.15s ease;
    color: var(--text-primary);
}

.logo-preset-btn:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    background-color: var(--brand-primary-subtle);
}

.logo-preset-btn.active {
    border-color: var(--brand-primary);
    background-color: var(--brand-primary-subtle);
    color: var(--brand-primary);
    box-shadow: 0 0 0 2px var(--brand-primary);
}

/* Batch Generator Table & Cards */
.batch-results-table {
    border-collapse: separate;
    border-spacing: 0;
}

.batch-thumb-preview {
    width: 44px;
    height: 44px;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid var(--card-border);
    background: #fff;
}

/* Marketing Sections */
.marketing-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 1.75rem;
    height: 100%;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.marketing-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.marketing-icon-badge {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.75rem;
    background-color: var(--brand-primary-subtle);
    color: var(--brand-primary);
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

/* Footer Link */
.footer-link {
    transition: color 0.15s ease, transform 0.15s ease;
    display: inline-block;
}

.footer-link:hover {
    color: var(--brand-primary) !important;
    transform: translateX(2px);
}

/* Form Controls Polish */
.form-control, .form-select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-primary);
    border-radius: 0.65rem;
    padding: 0.65rem 0.9rem;
    font-size: 0.925rem;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(var(--brand-primary-rgb), 0.15);
    background-color: var(--input-bg);
    color: var(--text-primary);
}

.input-group-text {
    background-color: var(--qr-stage-bg);
    border-color: var(--input-border);
    color: var(--text-secondary);
}

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

.fade-in-tab {
    animation: fadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Accessibility & Print */
@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media print {
    header, footer, .sticky-preview-wrapper .btn, .type-selector-nav, .studio-accordion {
        display: none !important;
    }
    .preview-stage-container {
        border: none !important;
        background: transparent !important;
    }
}