/* ========================================
   QRToolsHub - Premium SaaS Design System
   ======================================== */

/* ---------- Design Tokens ---------- */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #60a5fa;
  --primary-bg: #eff6ff;
  --secondary: #3b82f6;
  --accent: #06b6d4;
  --accent-bg: #ecfeff;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --border-focus: #2563eb;
  --success: #059669;
  --success-bg: #ecfdf5;
  --error: #dc2626;
  --error-bg: #fef2f2;
  --warning: #d97706;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 1px 4px rgba(0,0,0,0.02);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 24px rgba(37,99,235,0.15);
  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --content-width: 720px;
  --header-height: 64px;
  --transition: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --glass-bg: rgba(255,255,255,0.7);
  --glass-border: rgba(255,255,255,0.3);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.06);
}

[data-theme="dark"] {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #93c5fd;
  --primary-bg: #1e293b;
  --secondary: #60a5fa;
  --accent: #22d3ee;
  --accent-bg: #0f172a;
  --bg: #0b1120;
  --bg-card: #131b2e;
  --bg-secondary: #1a2338;
  --bg-tertiary: #243049;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;
  --border: #1e293b;
  --border-light: #1a2338;
  --border-focus: #3b82f6;
  --success: #34d399;
  --success-bg: #064e3b;
  --error: #f87171;
  --error-bg: #450a0a;
  --warning: #fbbf24;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 24px rgba(59,130,246,0.15);
  --glass-bg: rgba(19,27,46,0.7);
  --glass-border: rgba(30,41,59,0.5);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition-slow), color var(--transition-slow);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--primary);
  color: #fff;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--primary);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: top var(--transition);
}
.skip-link:focus { top: 16px; }

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: background var(--transition);
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.5px;
  flex-shrink: 0;
  transition: opacity var(--transition);
}
.logo:hover { opacity: 0.8; }
.logo svg { color: var(--primary); }
.logo span { color: var(--primary); }

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  justify-content: flex-end;
}

/* ---------- Tool Navigation ---------- */
.tool-nav {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
  padding: 0 4px;
}
.tool-nav::-webkit-scrollbar { display: none; }

.tool-nav-btn {
  background: none;
  border: none;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
  position: relative;
}
.tool-nav-btn:hover {
  color: var(--text);
  background: var(--bg-secondary);
}
.tool-nav-btn.active {
  color: var(--primary);
  background: var(--primary-bg);
}

/* ---------- Theme Button ---------- */
.theme-btn {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
  margin-left: 4px;
}
.theme-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-bg);
  transform: rotate(12deg);
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  padding: 80px 0 64px;
  text-align: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-bg-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
}
.hero-bg-circle:nth-child(1) {
  width: 400px; height: 400px;
  background: var(--primary);
  top: -100px; left: -100px;
}
.hero-bg-circle:nth-child(2) {
  width: 300px; height: 300px;
  background: var(--accent);
  top: 50px; right: -50px;
}
.hero-bg-circle:nth-child(3) {
  width: 250px; height: 250px;
  background: var(--secondary);
  bottom: -80px; left: 50%;
  transform: translateX(-50%);
}

.hero .container { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 20px;
}
.hero h1 span { color: var(--primary); }
.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.7;
}
.hero-search {
  position: relative;
  max-width: 480px;
  margin: 0 auto;
}
.hero-search .search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}
.hero-search input {
  width: 100%;
  padding: 16px 16px 16px 52px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
}
.hero-search input:focus {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
}

/* ---------- Section Headers ---------- */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}
.section-header h2 span { color: var(--primary); }
.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto;
}

/* ---------- Features Section ---------- */
.features-section {
  padding: 80px 0;
  background: var(--bg-secondary);
  transition: background var(--transition-slow);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- Tools Grid ---------- */
.tools-grid-section {
  padding: 80px 0;
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
  position: relative;
  overflow: hidden;
}
.tool-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border);
}
.tool-card:active {
  transform: translateY(-2px);
}
.tool-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin: 0 auto 16px;
  transition: transform var(--transition);
}
.tool-card:hover .tool-card-icon {
  transform: scale(1.1);
}
.tool-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.tool-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.tool-card-arrow {
  position: absolute;
  top: 16px;
  right: 16px;
  color: var(--text-muted);
  transition: transform var(--transition);
}
.tool-card:hover .tool-card-arrow {
  transform: translateX(4px);
  color: var(--primary);
}

/* ---------- Main ---------- */
.main { flex: 1; }

/* ---------- Main ---------- */
.main { flex: 1; }

/* ---------- Tool Sections ---------- */
.tool-section { display: none; }
.tool-section.active { display: block; }
.tool-section { padding: 40px 0 80px; }

.tool-header {
  text-align: center;
  margin-bottom: 40px;
}
.tool-header h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.tool-header h1 span { color: var(--primary); }
.tool-header p {
  color: var(--text-secondary);
  margin-top: 10px;
  font-size: 1rem;
  line-height: 1.6;
}

/* ---------- Tool Layout ---------- */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
  max-width: var(--content-width);
  margin: 0 auto;
}

.tool-layout-wide {
  max-width: 960px;
}
.tool-layout-wide .form-row-4 {
  gap: 12px;
}
.tool-layout-wide .form-row-4 .form-group {
  min-width: 0;
}
.tool-layout-wide .form-row-3 {
  gap: 12px;
}
  .tool-layout-wide .color-picker-wrap input[type="color"] {
  height: 52px;
}
.tool-layout-wide .checkbox-label {
  font-size: 0.85rem;
  padding: 6px 0;
}
.tool-layout-wide .logo-upload-row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
.tool-layout-wide .logo-upload-row .form-group {
  flex: 1;
  margin-bottom: 0;
}
.tool-layout-wide .logo-upload-row .form-group:last-child {
  flex: 0 0 auto;
}

/* ---------- Card ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

/* ---------- Form Groups ---------- */
.form-group {
  margin-bottom: 20px;
  position: relative;
}
.form-group:last-child { margin-bottom: 0; }

.form-row {
  display: flex;
  gap: 16px;
}
.form-row .form-group { flex: 1; min-width: 0; }
.form-row-3 { gap: 12px; }
.form-row-4 { gap: 10px; }

/* ---------- Labels ---------- */
label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

/* ---------- Floating Labels ---------- */
.form-group.float {
  position: relative;
  padding-top: 0;
}
.form-group.float .input,
.form-group.float .textarea {
  padding: 20px 16px 8px;
  height: auto;
}
.form-group.float label {
  position: absolute;
  left: 16px;
  top: 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  pointer-events: none;
  transition: all var(--transition);
  background: var(--bg-card);
  padding: 0 4px;
  margin-bottom: 0;
}
.form-group.float .input:focus + label,
.form-group.float .input:not(:placeholder-shown) + label,
.form-group.float .textarea:focus + label,
.form-group.float .textarea:not(:placeholder-shown) + label {
  top: 6px;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--primary);
}

/* ---------- Inputs ---------- */
.input {
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  outline: none;
  transition: all var(--transition);
  line-height: 1.5;
}
.input:hover {
  border-color: var(--text-muted);
}
.input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.input::placeholder { color: var(--text-muted); }

select.input {
  appearance: auto;
  cursor: pointer;
}

.textarea {
  resize: vertical;
  min-height: 80px;
  line-height: 1.5;
}

/* ---------- Checkbox ---------- */
.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-weight: 500;
  padding: 10px 0;
  margin-bottom: 0;
  font-size: 0.9rem;
  color: var(--text);
}
.checkbox-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
  border-radius: 4px;
}

/* ---------- Color Picker ---------- */
.color-picker-wrap { position: relative; }
.color-picker-wrap input[type="color"] {
  width: 100%;
  height: 48px;
  padding: 4px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  cursor: pointer;
  transition: all var(--transition);
}
.color-picker-wrap input[type="color"]:hover {
  border-color: var(--text-muted);
}
.color-picker-wrap input[type="color"]:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

/* ---------- Buttons ---------- */
.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  width: 100%;
  justify-content: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  font-family: inherit;
  flex: 1;
  min-width: 110px;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--transition);
}
.btn:hover::after { opacity: 1; }
.btn:active::after { opacity: 0.2; }

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 2px 8px rgba(37,99,235,0.2);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37,99,235,0.35);
}
.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}

.btn-outline {
  background: none;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
}
.btn-outline:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-bg);
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, var(--success), #047857);
  color: #fff;
  box-shadow: 0 2px 8px rgba(5,150,105,0.2);
}
.btn-success:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(5,150,105,0.35);
}
.btn-success:active:not(:disabled) {
  transform: translateY(0);
}

/* ---------- QR Frame ---------- */
.qr-output {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.qr-frame {
  width: 280px;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  position: relative;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}
.qr-frame.has-qr {
  border-style: solid;
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}
.qr-frame canvas {
  max-width: 100%;
  max-height: 100%;
  border-radius: 8px;
}

.qr-placeholder {
  text-align: center;
  color: var(--text-muted);
}
.qr-placeholder svg {
  width: 48px;
  height: 48px;
  margin: 0 auto 8px;
  display: block;
  opacity: 0.35;
}
.qr-placeholder p { font-size: 0.85rem; }

/* ---------- Spinner ---------- */
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Camera ---------- */
.camera-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.camera-controls .btn { flex: 0 1 auto; min-width: 0; }

.video-wrapper {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition);
}
.video-wrapper video {
  display: none;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.video-wrapper video.active { display: block; }

.video-placeholder {
  text-align: center;
  color: var(--text-muted);
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.video-placeholder p { font-size: 0.85rem; }

/* ---------- Scan Area ---------- */
.scan-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.scan-area:hover,
.scan-area.dragover {
  border-color: var(--primary);
  background: var(--primary-bg);
  box-shadow: var(--shadow-glow);
}
.scan-area svg { color: var(--text-muted); }
.scan-area p { font-size: 0.9rem; color: var(--text-secondary); }
.scan-hint { font-size: 0.8rem; color: var(--text-muted); }

/* ---------- Scan Result ---------- */
.scan-result {
  width: 100%;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.scan-result-placeholder {
  text-align: center;
  color: var(--text-muted);
}
.scan-result-placeholder svg {
  opacity: 0.35;
  margin-bottom: 8px;
}
.scan-result-placeholder p { font-size: 0.85rem; }

.scan-result-content {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  transition: all var(--transition);
}
.scan-result-content:hover {
  border-color: var(--text-muted);
}

.result-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 8px;
}
.result-text {
  font-size: 0.95rem;
  word-break: break-all;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 14px;
  max-height: 200px;
  overflow-y: auto;
}
.result-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.result-actions .btn { flex: 0 1 auto; min-width: 0; }

/* ---------- Error Message ---------- */
.error-msg {
  display: none;
  color: var(--error);
  font-size: 0.82rem;
  margin-top: 6px;
  align-items: center;
  gap: 6px;
  background: var(--error-bg);
  padding: 8px 12px;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(220,38,38,0.15);
}
.error-msg.show { display: flex; }

/* ---------- Toast ---------- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 380px;
}
.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  animation: toastIn 0.3s ease;
  border-left: 3.5px solid var(--primary);
}
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--error); }
@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---------- Tool Tips ---------- */
.tool-tips {
  max-width: var(--content-width);
  margin: 40px auto 0;
  background: var(--primary-bg);
  border: 1px solid rgba(37,99,235,0.12);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}
.tool-tips h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
}
.tool-tips ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.tool-tips ul li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}
.tool-tips ul li svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--success);
}

/* ---------- Why Choose Us ---------- */
.why-section {
  padding: 80px 0;
  background: var(--bg-secondary);
  transition: background var(--transition-slow);
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}
.why-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.why-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}
.why-item h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.why-item p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- Testimonials ---------- */
.testimonials-section {
  padding: 80px 0;
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}
.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border);
  transform: translateY(-2px);
}
.testimonial-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 16px;
  color: #f59e0b;
}
.testimonial-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-bg);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.testimonial-name {
  font-weight: 600;
  font-size: 0.9rem;
}
.testimonial-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ---------- FAQ ---------- */
.faq-section {
  padding: 80px 0;
  background: var(--bg-secondary);
  transition: background var(--transition-slow);
}
.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-question svg {
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--text-muted);
}
.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}
.faq-item.open .faq-answer {
  max-height: 300px;
}
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- CTA ---------- */
.cta-section {
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-card {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius);
  padding: 64px 32px;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(800px circle at 50% -100px, rgba(255,255,255,0.1), transparent);
  pointer-events: none;
}
.cta-card h2 {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  position: relative;
}
.cta-card p {
  color: rgba(255,255,255,0.85);
  font-size: 1.05rem;
  margin-bottom: 28px;
  position: relative;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--primary);
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition);
  position: relative;
}
.cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border-light);
  padding: 48px 0 32px;
  background: var(--bg-card);
  transition: background var(--transition-slow);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 12px;
  line-height: 1.6;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------- Animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideUpFade {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in { animation: fadeIn 0.6s ease both; }
.animate-slide-up { animation: slideUp 0.5s ease both; }

.animate-stagger > * {
  animation: slideUpFade 0.5s ease both;
}
.animate-stagger > *:nth-child(1) { animation-delay: 0ms; }
.animate-stagger > *:nth-child(2) { animation-delay: 80ms; }
.animate-stagger > *:nth-child(3) { animation-delay: 160ms; }
.animate-stagger > *:nth-child(4) { animation-delay: 240ms; }
.animate-stagger > *:nth-child(5) { animation-delay: 320ms; }
.animate-stagger > *:nth-child(6) { animation-delay: 400ms; }
.animate-stagger > *:nth-child(7) { animation-delay: 480ms; }
.animate-stagger > *:nth-child(8) { animation-delay: 560ms; }

/* ---------- Focus ---------- */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .tool-layout { max-width: 100%; }
  .tool-layout-wide { max-width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .tool-header h1 { font-size: 1.5rem; }
  .section-header h2 { font-size: 1.6rem; }
  .tool-layout { grid-template-columns: 1fr; gap: 24px; }
  .qr-output { position: static; }
  .qr-frame { width: 220px; height: 220px; }
  .card { padding: 24px; }
  .toast-container { left: 16px; right: 16px; bottom: 16px; max-width: none; }
  .tool-nav-btn { padding: 8px 12px; font-size: 0.78rem; flex-shrink: 0; }
  .header-right { gap: 6px; overflow: hidden; }
  .form-row { flex-direction: column; gap: 0; }
  .form-row-4 { flex-direction: row; flex-wrap: wrap; }
  .form-row-4 .form-group { flex: 1 1 45%; min-width: 0; }
  .form-row-3 { flex-direction: row; flex-wrap: wrap; }
  .form-row-3 .form-group { flex: 1 1 45%; min-width: 0; }
  .features-grid { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .cta-card { padding: 40px 24px; }
  .cta-card h2 { font-size: 1.5rem; }
  .tool-section { padding: 24px 0 60px; }
}

@media (max-width: 480px) {
  .btn-group { flex-direction: column; }
  .btn { min-width: 0; }
  .camera-controls { flex-direction: column; }
  .scan-area { padding: 24px 16px; }
  .tools-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
  .form-row-4 { flex-direction: column; }
  .form-row-3 { flex-direction: column; }
  .tool-layout-wide .logo-upload-row { flex-direction: column; align-items: stretch; }
  .tool-layout-wide .logo-upload-row .form-group:last-child { flex: 1; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Ad Container ---------- */
.ad-container {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 40px auto;
  overflow: hidden;
  min-height: 90px;
}

/* ---------- Print ---------- */
@media print {
  .header, .footer, .btn, .theme-btn, .tool-nav,
  .hero, .features-section, .tools-grid-section,
  .why-section, .testimonials-section, .faq-section, .cta-section,
  .tool-tips, .ad-container { display: none !important; }
  .tool-section { display: block !important; }
  .tool-layout { grid-template-columns: 1fr; }
  .card { border: 1px solid #ccc; box-shadow: none; }
}