/* ============================================
   ConvertPDF – Premium Dark Design System
   Dark Mode · Glassmorphism · Fluid Animations
   ============================================ */

/* ── Google Fonts ── */
/* Font loaded via non-blocking <link> in HTML — no @import needed */

/* ── Design Tokens ── */
:root {
    /* Brand */
    --accent: #4f9eff;
    --accent-vivid: #2979ff;
    --accent-light: #80bdff;
    --accent-glow: rgba(79, 158, 255, 0.25);

    /* Backgrounds */
    --bg-root: #0b0f1a;
    --bg-surface: #111827;
    --bg-card: #161d2e;
    --bg-card-hover: #1c2540;
    --bg-input: #0f1623;
    --bg-overlay: rgba(17, 24, 39, 0.85);

    /* Text */
    --text-primary: #f0f4ff;
    --text-secondary: #8fa3c8;
    --text-muted: #4e6082;

    /* Borders */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-card: rgba(79, 158, 255, 0.12);
    --border-focus: rgba(79, 158, 255, 0.5);

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 24px rgba(79, 158, 255, 0.18);

    /* Radius */
    --r-sm: 6px;
    --r-md: 12px;
    --r-lg: 18px;
    --r-xl: 28px;
    --r-full: 9999px;

    /* Spacing */
    --header-h: 68px;

    /* Font */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --input-h: 50px;
}

/* ── Reset ── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-root);
    color: var(--text-primary);
    line-height: 1.65;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
iframe,
canvas,
svg {
    max-width: 100%;
}

/* ── Root noise texture overlay ── */
/* Note: Renders at z-index 0. .app-container and other main layers must have z-index >= 1 to appear above it. */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
}

/* ── Typography ── */
h1,
h2,
h3,
h4 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
}

h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
}

h3 {
    font-size: 1.35rem;
    font-weight: 600;
}

h4 {
    font-size: 1.05rem;
    font-weight: 600;
}

p {
    margin-bottom: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.15s;
}

a:hover {
    color: var(--accent-light);
    opacity: 0.85;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent-light);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    left: 0.75rem;
    top: -120px;
    background: #ffffff;
    color: #111827;
    border-radius: var(--r-sm);
    padding: 0.65rem 0.95rem;
    font-weight: 700;
    z-index: 5000;
    box-shadow: var(--shadow-md);
}

.skip-link:focus {
    top: 0.75rem;
}

code {
    background: rgba(79, 158, 255, 0.12);
    color: var(--accent-light);
    padding: 0.15rem 0.45rem;
    border-radius: var(--r-sm);
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.875em;
}

/* ── Container ── */
.app-container {
    max-width: 1380px;
    width: 100%;
    margin: 0 auto;
    padding: clamp(1rem, 2.5vw, 2rem);
    position: relative;
    z-index: 1;
    overflow-x: hidden;
}

/* ═══════════════════════════════════════════
   HEADER
═══════════════════════════════════════════ */
.site-header {
    background: rgba(11, 15, 26, 0.8);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border-bottom: 1px solid var(--border-subtle);
    width: 100%;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04), 0 8px 32px rgba(0, 0, 0, 0.3);
}

.header-container {
    max-width: 1380px;
    margin: 0 auto;
    padding: 0 2rem;
    height: var(--header-h);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s;
}

.logo a:hover {
    color: var(--accent);
}

.logo a::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.main-nav a {
    color: var(--text-secondary);
    font-size: 0.925rem;
    font-weight: 500;
    padding: 0.45rem 0.9rem;
    border-radius: var(--r-full);
    transition: background 0.2s, color 0.2s;
}

.main-nav a:hover {
    background: rgba(79, 158, 255, 0.1);
    color: var(--accent-light);
    text-decoration: none;
}

.main-nav a.active {
    background: rgba(79, 158, 255, 0.15);
    color: var(--accent);
    border: 1px solid rgba(79, 158, 255, 0.25);
}

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    min-width: auto;
    width: auto;
    height: auto;
    box-shadow: none;
}

.nav-toggle .bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ═══════════════════════════════════════════
   HERO
═══════════════════════════════════════════ */
.hero {
    position: relative;
    overflow: hidden;
    border-radius: var(--r-lg);
    padding: 5rem 2rem 4rem;
    margin: 2.5rem 0 2rem;
    text-align: center;
    background: linear-gradient(135deg, #050d1a 0%, #0b172e 50%, #071128 100%);
    border: 1px solid var(--border-card);
    box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

/* Animated aurora behind hero */
.hero::before {
    content: '';
    position: absolute;
    inset: -40%;
    background:
        radial-gradient(ellipse 60% 40% at 30% 60%, rgba(41, 121, 255, 0.22) 0%, transparent 70%),
        radial-gradient(ellipse 50% 35% at 75% 30%, rgba(79, 158, 255, 0.14) 0%, transparent 60%),
        radial-gradient(ellipse 40% 30% at 55% 80%, rgba(99, 102, 241, 0.12) 0%, transparent 60%);
    animation: auroraShift 12s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes auroraShift {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(3%, 4%) scale(1.08);
    }
}

/* Grid overlay on hero */
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(79, 158, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(79, 158, 255, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero h1 {
    position: relative;
    z-index: 1;
    color: #ffffff;
    font-size: clamp(2rem, 5vw, 3.4rem);
    font-weight: 800;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #ffffff 40%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    position: relative;
    z-index: 1;
    font-size: 1.1rem;
    color: rgba(180, 200, 240, 0.85);
    max-width: 600px;
    margin: 0 auto 2rem;
    font-weight: 400;
}

.hero-stats {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.stat-item {
    background: rgba(79, 158, 255, 0.08);
    border: 1px solid rgba(79, 158, 255, 0.2);
    backdrop-filter: blur(8px);
    padding: 0.4rem 1.1rem;
    border-radius: var(--r-full);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-item strong {
    color: var(--accent);
    font-weight: 700;
}

.hero-cta {
    position: relative;
    z-index: 1;
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ═══════════════════════════════════════════
   BUTTONS
═══════════════════════════════════════════ */
.button,
button,
.download-btn,
.back-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: var(--input-h);
    padding: 0 1.75rem;
    border-radius: var(--r-xl);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    text-decoration: none;
    white-space: nowrap;
    min-width: 160px;
    background: var(--accent-vivid);
    color: #fff;
    box-shadow: 0 4px 16px rgba(41, 121, 255, 0.35);
    position: relative;
    overflow: hidden;
}

.button::after,
button::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(rgba(255, 255, 255, 0.08), transparent);
    pointer-events: none;
}

.button:hover,
button:hover {
    background: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79, 158, 255, 0.4);
    color: #fff;
    text-decoration: none;
}

.button.secondary,
button.secondary {
    background: rgba(255, 255, 255, 0.04);
    color: #a8bfd8;
    /* WCAG AA contrast-safe upgrade from --text-secondary */
    border-color: var(--border-subtle);
    box-shadow: none;
}

.button.secondary:hover,
button.secondary:hover {
    background: rgba(79, 158, 255, 0.1);
    color: var(--accent-light);
    border-color: var(--border-focus);
    transform: translateY(-2px);
}

.download-btn {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    box-shadow: 0 4px 16px rgba(34, 197, 94, 0.3);
}

.download-btn:hover {
    background: linear-gradient(135deg, #4ade80, #22c55e);
    box-shadow: 0 8px 24px rgba(34, 197, 94, 0.4);
}

.back-btn {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    box-shadow: none;
    min-width: 120px;
}

.back-btn:hover {
    background: rgba(79, 158, 255, 0.08);
    color: var(--accent-light);
    border-color: var(--border-focus);
}

button:disabled,
.button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

@media (max-width: 600px) {

    .button,
    .download-btn,
    .back-btn {
        min-width: 100%;
        width: 100%;
    }

    .file-actions button,
    .nav-toggle,
    .cookie-btn,
    .orientation-selector button,
    .permissions-grid button {
        width: auto;
        min-width: auto;
    }
}

/* ═══════════════════════════════════════════
   TOOL GRID (HOME)
═══════════════════════════════════════════ */
#homeSection h2,
.home-grid-title {
    font-size: 1.6rem;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-size: 0.8rem;
    border: none;
    margin-bottom: 1.5rem;
    padding-bottom: 0;
}

.home-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.25rem;
    margin: 0.5rem 0 3rem;
}

.tool-card {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--r-lg);
    padding: 2rem 1.25rem 1.5rem;
    border: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    text-decoration: none;
    color: inherit;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    overflow: hidden;
    cursor: pointer;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.tool-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-card);
    background: var(--bg-card-hover);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), var(--shadow-glow);
    text-decoration: none;
    color: inherit;
}

.tool-card:hover::before {
    opacity: 1;
}

.tool-icon {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: rgba(79, 158, 255, 0.08);
    border-radius: var(--r-md);
    border: 1px solid rgba(79, 158, 255, 0.1);
    transition: background 0.25s, transform 0.25s;
}

.tool-card:hover .tool-icon {
    background: rgba(79, 158, 255, 0.15);
    transform: scale(1.08);
}

.tool-name {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
    line-height: 1.3;
}

.tool-desc {
    color: #cbd5e1;
    /* Increased contrast from #4e6082 */
    font-size: 0.83rem;
    line-height: 1.45;
}

/* Section header above tools */
#homeSection {
    margin: 0;
}

#homeSection h2 {
    font-size: 1.6rem;
    border: none;
    padding: 0;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    text-transform: none;
    font-weight: 700;
}

/* ═══════════════════════════════════════════
   TOOL PANEL & CONTENT SECTIONS
═══════════════════════════════════════════ */
.tool-panel,
.content-section,
.premium-card {
    background: var(--bg-card);
    border-radius: var(--r-lg);
    padding: 2.5rem;
    margin: 2rem 0;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-md);
    min-height: 120px;
    position: relative;
    overflow-wrap: anywhere;
}

.tool-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 2rem;
    right: 2rem;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(79, 158, 255, 0.3), transparent);
}

.content-section h2 {
    font-size: 1.5rem;
    border: none;
    padding: 0;
    margin-bottom: 1rem;
}

.content-section h3 {
    font-size: 1.1rem;
    margin: 1.5rem 0 0.5rem;
    color: var(--accent-light);
}

/* ── How It Works ── */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.step-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-subtle);
    padding: 2rem;
    border-radius: var(--r-lg);
    position: relative;
    transition: transform 0.3s;
}

.step-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.04);
}

.step-num {
    position: absolute;
    top: -15px;
    left: 20px;
    width: 40px;
    height: 40px;
    background: var(--accent-vivid);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(41, 121, 255, 0.4);
}

/* ── FAQ ── */
.faq-list {
    margin-top: 2rem;
}

.faq-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.faq-item h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

/* ── Blog Highlights ── */
.blog-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.blog-mini-card {
    background: var(--bg-card-hover);
    padding: 1.5rem;
    border-radius: var(--r-md);
    border-left: 4px solid var(--accent);
}

.blog-mini-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.blog-mini-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

.content-section ul {
    padding-left: 1.25rem;
    margin-bottom: 1rem;
}

.content-section li {
    margin-bottom: 0.4rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.content-section li strong {
    color: var(--text-primary);
}

.content-section .seo-content {
    max-width: min(100%, 980px);
}

.content-section .seo-intro {
    font-size: 1.02rem;
}

.content-section .seo-feature-list li {
    margin-bottom: 0.65rem;
}

.content-section .seo-meta-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin: 1rem 0 1.5rem;
}

.content-section .seo-meta-card {
    background: rgba(79, 158, 255, 0.07);
    border: 1px solid var(--border-subtle);
    border-radius: var(--r-md);
    padding: 0.95rem 1rem;
}

.content-section .seo-meta-card strong {
    color: var(--accent-light);
}

.tool-header {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

/* Breadcrumbs */
.breadcrumb {
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--accent);
}

/* ═══════════════════════════════════════════
   FORM ELEMENTS
═══════════════════════════════════════════ */
.area {
    background: var(--bg-input);
    border-radius: var(--r-md);
    padding: 2rem;
    border: 2px dashed rgba(79, 158, 255, 0.2);
    margin-bottom: 1.5rem;
    transition: border-color 0.2s;
}

.area:hover {
    border-color: rgba(79, 158, 255, 0.4);
}

.flex-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1rem;
}

input[type="file"],
input[type="text"],
input[type="password"],
input[type="number"],
input[type="url"],
input[type="email"],
select,
textarea {
    background: var(--bg-input);
    color: var(--text-primary);
    height: var(--input-h);
    padding: 0 1.2rem;
    border-radius: var(--r-xl);
    border: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.95rem;
    width: 100%;
    max-width: 420px;
    font-family: var(--font);
    transition: border-color 0.2s, box-shadow 0.2s;
}

textarea {
    height: auto;
    min-height: 120px;
    padding: 1rem 1.2rem;
    line-height: 1.6;
    border-radius: var(--r-md);
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238fa3c8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(79, 158, 255, 0.12);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
}

/* Labels */
label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 0.3rem;
}

/* Color input */
input[type="color"] {
    height: 42px;
    padding: 0.2rem;
    border-radius: var(--r-md);
    cursor: pointer;
    max-width: 100%;
}

/* ═══════════════════════════════════════════
   FILE LISTS
═══════════════════════════════════════════ */
.file-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-input);
    padding: 0.65rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: var(--r-xl);
    border: 1px solid var(--border-subtle);
    transition: background 0.15s, border-color 0.15s;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.file-item:hover {
    background: rgba(79, 158, 255, 0.06);
    border-color: var(--border-card);
}

.file-name {
    flex: 1;
    word-break: break-word;
    padding-right: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.file-actions {
    display: flex;
    gap: 0.3rem;
}

.file-actions button {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    padding: 0 0.8rem;
    height: 30px;
    min-height: auto;
    min-width: auto;
    border-radius: var(--r-full);
    font-size: 0.85rem;
    box-shadow: none;
}

.file-actions button:hover {
    background: rgba(79, 158, 255, 0.1);
    color: var(--accent-light);
    border-color: var(--border-card);
    transform: none;
}

/* ═══════════════════════════════════════════
   PREVIEW BOXES
═══════════════════════════════════════════ */
.preview-box {
    background: var(--bg-input);
    border-radius: var(--r-md);
    padding: 1.5rem;
    min-height: 200px;
    margin: 1.25rem 0;
    overflow: auto;
    border: 1px solid var(--border-subtle);
    width: 100%;
}

.preview-box iframe,
.preview-box img,
.preview-box canvas {
    max-width: 100%;
    height: auto;
    border-radius: var(--r-sm);
}

/* ═══════════════════════════════════════════
   TOOL DESCRIPTION BOX
═══════════════════════════════════════════ */
.tool-description {
    background: rgba(79, 158, 255, 0.06);
    border-radius: var(--r-md);
    padding: 1.25rem 1.5rem;
    margin: 1rem 0 1.5rem;
    border-left: 3px solid var(--accent);
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ═══════════════════════════════════════════
   PERMISSIONS / OPTIONS GRIDS
═══════════════════════════════════════════ */
.permissions-grid {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.permissions-grid label,
.orientation-selector label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
}

.orientation-selector {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin: 1rem 0;
    flex-wrap: wrap;
}

/* Password strength */
.password-strength {
    margin: 0.5rem 0;
    font-weight: 600;
    font-size: 0.875rem;
}

/* QR options grid */
.qr-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.qr-option {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.qr-option label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ═══════════════════════════════════════════
   FAQ
═══════════════════════════════════════════ */
.faq-section {
    margin: 2rem 0;
    border-radius: var(--r-md);
    overflow: hidden;
}

.faq-section details {
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--r-md);
    background: var(--bg-card);
    transition: border-color 0.2s;
}

.faq-section details[open] {
    border-color: var(--border-card);
}

.faq-section summary {
    padding: 1rem 1.25rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    user-select: none;
}

.faq-section summary::-webkit-details-marker {
    display: none;
}

.faq-section summary::after {
    content: '+';
    font-size: 1.3rem;
    color: var(--accent);
    transition: transform 0.25s;
    flex-shrink: 0;
}

.faq-section details[open] summary::after {
    transform: rotate(45deg);
}

.faq-section .faq-answer {
    padding: 0 1.25rem 1rem;
    color: var(--text-secondary);
    line-height: 1.65;
    font-size: 0.9rem;
}

/* ═══════════════════════════════════════════
   TOAST NOTIFICATIONS
═══════════════════════════════════════════ */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 380px;
}

.toast {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-card);
    padding: 1rem 1.25rem;
    border-radius: var(--r-md);
    box-shadow: var(--shadow-lg);
    font-size: 0.9rem;
    font-weight: 500;
    animation: toastIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    backdrop-filter: blur(12px);
}

.toast.success {
    border-left: 3px solid #22c55e;
}

.toast.error {
    border-left: 3px solid #ef4444;
}

.toast.info {
    border-left: 3px solid var(--accent);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(20px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

/* ═══════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════ */
.site-footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-subtle);
    margin-top: 5rem;
    padding: 3.5rem 0 1.5rem;
    width: 100%;
    position: relative;
    z-index: 1;
}

.footer-container {
    max-width: 1380px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2.5rem;
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1.25rem;
}

.footer-col p {
    font-size: 0.875rem;
    color: #7a92b4;
    /* WCAG AA: 5.57:1 on #111827 — was var(--text-muted)=#4e6082 at 2.8:1 */
    line-height: 1.6;
}

.footer-col ul {
    list-style: none;
    padding: 0;
}

.footer-col li {
    margin-bottom: 0.6rem;
}

.footer-col a {
    color: #7a92b4;
    /* WCAG AA upgrade from --text-muted (#4e6082) on dark bg */
    font-size: 0.875rem;
    font-weight: 400;
    transition: opacity 0.15s, padding-left 0.15s;
}

.footer-col a:hover {
    color: var(--accent);
    padding-left: 4px;
    opacity: 1;
}

.social-links {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 50%;
    font-size: 1rem;
    color: var(--text-muted);
    transition: all 0.2s;
    padding: 0;
}

.social-links a:hover {
    background: rgba(79, 158, 255, 0.15);
    border-color: var(--border-card);
    color: var(--accent);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding: 1.5rem 2rem 0;
    margin-top: 2.5rem;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.8rem;
    color: #7a92b4;
    /* WCAG AA: 5.57:1 on #111827 — was var(--text-muted)=#4e6082 at 2.8:1 */
}

.footer-bottom a {
    color: #7a92b4;
    /* WCAG AA upgrade from --text-muted on dark bg */
    margin: 0 0.4rem;
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* ═══════════════════════════════════════════
   BLOG CARDS
═══════════════════════════════════════════ */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.blog-card {
    background: var(--bg-card);
    border-radius: var(--r-lg);
    padding: 1.75rem;
    border: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
    transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.blog-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-card);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    color: inherit;
}

.blog-card-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.blog-card h2,
.blog-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.35;
}

.blog-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.6;
}

.blog-card .read-more {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    margin-top: auto;
}

/* Blog article body */
.blog-article {
    max-width: 740px;
    margin: 0 auto;
}

.blog-article h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.blog-article h2 {
    font-size: 1.4rem;
    border: none;
    margin: 2rem 0 0.75rem;
    padding: 0;
}

.blog-article h3 {
    font-size: 1.1rem;
    margin: 1.5rem 0 0.5rem;
}

/* ═══════════════════════════════════════════
   PROGRESS / STATUS
═══════════════════════════════════════════ */
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-input);
    border-radius: var(--r-full);
    overflow: hidden;
    margin: 0.75rem 0;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-vivid), var(--accent-light));
    border-radius: var(--r-full);
    transition: width 0.4s ease;
    box-shadow: 0 0 10px rgba(79, 158, 255, 0.5);
}

#status,
.status-msg {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0.5rem 0;
    min-height: 1.2em;
}

/* ═══════════════════════════════════════════
   ABOUT / PRIVACY / TERMS PAGES
═══════════════════════════════════════════ */
.page-hero {
    background: var(--bg-card);
    border-radius: var(--r-lg);
    padding: 3rem 2rem;
    margin: 2rem 0;
    border: 1px solid var(--border-subtle);
    text-align: center;
}

.page-hero h1 {
    font-size: 2.2rem;
    margin-bottom: 0.75rem;
}

.page-hero p {
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ═══════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════ */
@media (max-width: 1100px) {
    .home-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .area [style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }

    #htmlEditorSection [style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }

    .area [style*="display: flex; justify-content: space-between"] {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 0.65rem !important;
    }

    .content-section .seo-meta-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 800px) {
    .home-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Mobile nav */
    .nav-toggle {
        display: flex;
    }

    .main-nav {
        position: absolute;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: rgba(11, 15, 26, 0.97);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-subtle);
        padding: 1rem;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        z-index: 999;
    }

    .main-nav.open {
        max-height: 400px;
        padding: 1.25rem;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0.25rem;
    }

    .main-nav a {
        display: block;
        padding: 0.65rem 1rem;
        border-radius: var(--r-md);
    }

    .header-container {
        position: relative;
    }
}

@media (max-width: 600px) {
    .home-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .app-container {
        padding: 1rem;
    }

    .header-container {
        padding: 0 1.25rem;
    }

    .tool-panel,
    .content-section,
    .premium-card {
        padding: 1.25rem;
    }

    .hero {
        padding: 2.5rem 1rem 2rem;
    }
}

@media (max-width: 480px) {
    .home-grid {
        grid-template-columns: 1fr;
    }

    .tool-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .header-container .logo a {
        font-size: 1.25rem;
    }
}

/* ═══════════════════════════════════════════
   UTILITY CLASSES
═══════════════════════════════════════════ */
.text-muted {
    color: var(--text-muted);
}

.text-accent {
    color: var(--accent);
}

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

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.7rem;
    border-radius: var(--r-full);
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(79, 158, 255, 0.12);
    color: var(--accent);
    border: 1px solid rgba(79, 158, 255, 0.2);
    gap: 0.3rem;
}

/* Fade-in animation for page load */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.fade-up {
    animation: fadeUp 0.5s ease forwards;
}

/* ═══════════════════════════════════════════
   DROP ZONE
═══════════════════════════════════════════ */
.drop-zone {
    border: 2px dashed rgba(79, 158, 255, 0.25);
    border-radius: var(--r-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    cursor: pointer;
    background: var(--bg-input);
    transition: border-color 0.2s, background 0.2s;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.drop-zone p {
    color: var(--text-secondary);
    margin: 0;
}

.drop-zone p.note {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.3rem;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(79, 158, 255, 0.06);
}

/* ═══════════════════════════════════════════
   PROGRESS BAR (legacy compat)
═══════════════════════════════════════════ */
.progress-bar-bg {
    width: 100%;
    height: 6px;
    background: var(--bg-input);
    border-radius: var(--r-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-vivid), var(--accent-light));
    border-radius: var(--r-full);
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(79, 158, 255, 0.4);
}

/* ═══════════════════════════════════════════
   MISC TOOL ELEMENTS
═══════════════════════════════════════════ */
.hidden {
    display: none !important;
}

.warning {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.25);
    border-left: 3px solid #ef4444;
    color: #fca5a5;
    border-radius: var(--r-md);
    padding: 1.25rem 1.5rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* QR controls */
.qr-controls {
    margin-bottom: 1rem;
}

/* img thumbnail in file list */
.img-thumbnail {
    object-fit: cover;
    border-radius: var(--r-sm);
    border: 1px solid var(--border-subtle);
}

/* Preview title label */
.preview-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}


/* ═══════════════════════════════════════════
   POLICY PAGES (Privacy, Terms)
═══════════════════════════════════════════ */
.policy-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.policy-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.policy-section h2 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
}

.policy-section h3 {
    font-size: 1.05rem;
    margin: 1.25rem 0 0.5rem;
    color: var(--accent-light);
}

.policy-section table th {
    color: var(--text-primary);
    font-weight: 600;
    border-bottom: 1px solid var(--border-subtle);
    background: rgba(79, 158, 255, 0.08) !important;
}

.policy-section table td {
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.policy-section table {
    width: 100%;

    border-collapse: collapse;
    display: block;
    overflow-x: auto;
    border: 1px solid var(--border-subtle);
    border-radius: var(--r-md);
}

.policy-section table tr {
    background: transparent;
}

@media (max-width: 700px) {

    .policy-section table th,
    .policy-section table td {
        min-width: 170px;
    }
}

/* ═══════════════════════════════════════════
   PREMIUM UPGRADES (Top-Tier UI)
═══════════════════════════════════════════ */

/* Scroll Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 3D Tilt Cards (Spotlight effect) */
.tool-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(800px circle at var(--mouse-x) var(--mouse-y), rgba(79, 158, 255, 0.08), transparent 40%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 2;
}

.tool-card:hover::after {
    opacity: 1;
}

/* Custom Cursor */
.custom-cursor {
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    position: fixed;
    left: 0;
    top: 0;
    margin-left: -10px;
    margin-top: -10px;
    pointer-events: none;
    z-index: 9999;
    transition: width 0.2s, height 0.2s, background-color 0.2s;
    mix-blend-mode: screen;
}

.custom-cursor.hover {
    width: 40px;
    height: 40px;
    background-color: rgba(79, 158, 255, 0.2);
    border-color: transparent;
}

@media (pointer: coarse) {
    .custom-cursor {
        display: none;
    }
}

.privacy-note {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.75rem;
}

.processing-spinner-overlay {
    align-items: center;
    background: rgba(8, 12, 24, 0.72);
    display: flex;
    inset: 0;
    justify-content: center;
    position: fixed;
    z-index: 9999;
}

.processing-spinner-overlay[hidden] {
    display: none;
}

.processing-spinner-box {
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--r-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    min-width: 180px;
    padding: 1.5rem;
}

.spinner {
    animation: spin 0.8s linear infinite;
    border: 4px solid rgba(255, 255, 255, 0.16);
    border-top-color: var(--primary);
    border-radius: 50%;
    height: 42px;
    width: 42px;
}

.processing-spinner-box p {
    color: var(--text-primary);
    margin: 0;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .custom-cursor {
        display: none !important;
    }
}

/* Cookie consent (AdSense / GDPR-friendly disclosure) */
.cookie-consent-root {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 10001;
    padding: 1rem;
    pointer-events: none;
}

.cookie-consent-inner {
    pointer-events: auto;
    max-width: 52rem;
    margin: 0 auto;
    padding: 1.1rem 1.25rem;
    background: var(--bg-card, #151b2e);
    border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.12));
    border-radius: var(--r-md, 12px);
    box-shadow: var(--shadow-lg, 0 12px 40px rgba(0, 0, 0, 0.35));
}

.cookie-consent-title {
    margin: 0 0 0.5rem;
    font-size: 1.05rem;
    font-weight: 600;
}

.cookie-consent-text {
    margin: 0 0 1rem;
    font-size: 0.9rem;
    color: var(--text-muted, #9aa3b2);
    line-height: 1.5;
}

.cookie-consent-text a {
    color: var(--accent, #4f9eff);
}

.cookie-consent-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    align-items: center;
}

@media (max-width: 520px) {
    .cookie-consent-actions {
        flex-direction: column;
        align-items: stretch;
    }
}