/* ============================
   DESIGN TOKENS
   ============================ */
:root, [data-theme="dark"] {
  --color-bg:               #0d0e10;
  --color-surface:          #13151a;
  --color-surface-2:        #1a1d24;
  --color-surface-offset:   #1f2330;
  --color-surface-dynamic:  #252a38;
  --color-divider:          #2a2f3d;
  --color-border:           #323848;

  --color-text:             #e8eaf0;
  --color-text-muted:       #8a90a4;
  --color-text-faint:       #4a4f60;
  --color-text-inverse:     #0d0e10;

  --color-primary:          #00d4e8;
  --color-primary-hover:    #00bcd4;
  --color-primary-active:   #0097a7;
  --color-primary-glow:     rgba(0, 212, 232, 0.15);
  --color-primary-dim:      rgba(0, 212, 232, 0.07);

  --color-success:          #4caf82;
  --color-error:            #e05a6a;
  --color-warning:          #e8a838;

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:   0 12px 40px rgba(0,0,0,0.6);
  --glow-sm:     0 0 8px rgba(0, 212, 232, 0.3);
  --glow-md:     0 0 20px rgba(0, 212, 232, 0.25);
}

[data-theme="light"] {
  --color-bg:               #f0ede8;
  --color-surface:          #f7f5f1;
  --color-surface-2:        #fdfcfa;
  --color-surface-offset:   #e8e5e0;
  --color-surface-dynamic:  #dedad5;
  --color-divider:          #d4d0ca;
  --color-border:           #c8c4bc;

  --color-text:             #1a1c22;
  --color-text-muted:       #5a5f72;
  --color-text-faint:       #9a9fae;
  --color-text-inverse:     #f7f5f1;

  --color-primary:          #007a8a;
  --color-primary-hover:    #005f6e;
  --color-primary-active:   #004a58;
  --color-primary-glow:     rgba(0, 122, 138, 0.12);
  --color-primary-dim:      rgba(0, 122, 138, 0.06);

  --color-success:          #2e7d52;
  --color-error:            #b83244;
  --color-warning:          #b8700a;

  --shadow-sm:   0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg:   0 12px 40px rgba(0,0,0,0.14);
  --glow-sm:     0 0 8px rgba(0, 122, 138, 0.2);
  --glow-md:     0 0 20px rgba(0, 122, 138, 0.15);
}

:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition: 160ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  --text-xs:   clamp(0.75rem,  0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem + 2.5vw, 3.5rem);

  --font-display: 'Space Grotesk', 'Satoshi', sans-serif;
  --font-body:    'Satoshi', 'Inter', system-ui, sans-serif;
}

/* ============================
   RESET & BASE
   ============================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
}

/* Line grid — static, faint */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(42, 47, 61, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 47, 61, 0.18) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

[data-theme="light"] body::before {
  background-image:
    linear-gradient(rgba(180, 175, 168, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180, 175, 168, 0.4) 1px, transparent 1px);
}

/* Atmospheric glow blobs */
.bg-layers {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-glow {
  position: absolute;
  border-radius: 50%;
}

/* Top-right — anchors the header area */
.bg-glow--tr {
  width: 700px;
  height: 700px;
  top: -180px;
  right: -140px;
  background: radial-gradient(circle, rgba(0, 212, 232, 0.07) 0%, transparent 65%);
}

/* Bottom-left — balances the page */
.bg-glow--bl {
  width: 600px;
  height: 600px;
  bottom: -120px;
  left: -100px;
  background: radial-gradient(circle, rgba(0, 212, 232, 0.05) 0%, transparent 65%);
}

/* Center — very subtle depth under the generator */
.bg-glow--mc {
  width: 900px;
  height: 500px;
  top: 38%;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse, rgba(0, 212, 232, 0.03) 0%, transparent 70%);
}

[data-theme="light"] .bg-glow--tr {
  background: radial-gradient(circle, rgba(0, 122, 138, 0.055) 0%, transparent 65%);
}

[data-theme="light"] .bg-glow--bl {
  background: radial-gradient(circle, rgba(0, 122, 138, 0.04) 0%, transparent 65%);
}

[data-theme="light"] .bg-glow--mc {
  background: radial-gradient(ellipse, rgba(0, 122, 138, 0.025) 0%, transparent 70%);
}

/* Mouse-follow grid glow */
.bg-grid-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(0, 212, 232, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 232, 0.5) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0;
  transition: opacity 0.4s ease;
  -webkit-mask-image: radial-gradient(circle 180px at var(--mx, -999px) var(--my, -999px), black, transparent);
  mask-image: radial-gradient(circle 180px at var(--mx, -999px) var(--my, -999px), black, transparent);
}

.bg-grid-glow.is-active {
  opacity: 1;
}

[data-theme="light"] .bg-grid-glow {
  background-image:
    linear-gradient(rgba(0, 122, 138, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 122, 138, 0.4) 1px, transparent 1px);
}

main, header, footer, section, nav { position: relative; z-index: 1; }

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-hover); }
a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }

img { max-width: 100%; display: block; }
svg { display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 600;
  z-index: 9999;
  transition: top var(--transition);
}
.skip-link:focus { top: var(--space-4); }

/* ============================
   LAYOUT
   ============================ */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ============================
   HEADER
   ============================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 60px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo:hover { color: var(--color-primary); }
.site-logo:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }

.logo-mark {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
  flex-wrap: wrap;
}

.nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.btn-support {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-support:hover {
  background: var(--color-primary-dim);
  box-shadow: var(--glow-sm);
}

.header-donate-float {
  display: none;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translate(-50%, 50%);
  z-index: 10;
}

.header-donate-pill {
  display: block;
  padding: 5px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 0 8px rgba(0,212,232,0.2), 0 2px 8px rgba(0,0,0,0.25);
  transition: all var(--transition);
}

.header-donate-pill:hover {
  background: var(--color-primary-dim);
  box-shadow: var(--glow-sm), 0 2px 8px rgba(0,0,0,0.25);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  min-width: 44px;
  min-height: 44px;
}

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

.theme-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================
   HERO
   ============================ */
.hero {
  padding: var(--space-16) 0 var(--space-10);
  text-align: center;
}

.hero h1 {
  font-size: var(--text-xl);
  color: var(--color-text);
  max-width: 700px;
  margin: 0 auto var(--space-4);
}

.hero h1 span { color: var(--color-primary); }

.hero-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto var(--space-6);
}

.trust-chips {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.trust-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.trust-chip svg { color: var(--color-primary); flex-shrink: 0; }

/* ============================
   GENERATOR SECTION
   ============================ */
.generator-section {
  padding: 0 0 var(--space-16);
  overflow-x: hidden;
}

.generator-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-6);
  align-items: start;
}

/* ============================
   SHEIKAH PANEL
   ============================ */
.sheikah-panel {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  min-width: 0;
}

.sheikah-panel::before,
.sheikah-panel::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--color-primary);
  border-style: solid;
  opacity: 0.7;
  pointer-events: none;
}

.sheikah-panel::before {
  top: -1px;
  left: -1px;
  border-width: 2px 0 0 2px;
  border-radius: var(--radius-sm) 0 0 0;
}

.sheikah-panel::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 2px 2px 0;
  border-radius: 0 0 var(--radius-sm) 0;
}

/* ============================
   TABS
   ============================ */
.tab-list {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
  gap: 0;
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-5);
  transition: color var(--transition), border-color var(--transition);
  margin-bottom: -1px;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.tab-btn:hover { color: var(--color-text); }

.tab-btn[aria-selected="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============================
   PRESET PILLS
   ============================ */
.preset-row {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-6);
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.preset-row::-webkit-scrollbar { display: none; }

.preset-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: var(--space-2) var(--space-4);
  transition: all var(--transition);
  min-height: 36px;
  white-space: nowrap;
}

.preset-pill:hover {
  color: var(--color-text);
  border-color: var(--color-text-faint);
  background: var(--color-surface-dynamic);
}

.preset-pill.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-dim);
}

.preset-pill:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.preset-pill svg { flex-shrink: 0; }

/* ============================
   FORM
   ============================ */
.form-area {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

label .required {
  color: var(--color-error);
  font-size: var(--text-xs);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  padding: var(--space-3) var(--space-4);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-faint);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-dim);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(224, 90, 106, 0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
  line-height: 1.5;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238a90a4' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
  cursor: pointer;
}

.field-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.field-error.hidden { display: none; }

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  min-height: 44px;
  padding: var(--space-2) 0;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

/* ============================
   ADVANCED SETTINGS
   ============================ */
.advanced-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) 0;
  margin-top: var(--space-2);
  transition: color var(--transition);
  width: 100%;
  text-align: left;
}

.advanced-toggle:hover { color: var(--color-text); }

.advanced-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.advanced-toggle svg {
  transition: transform var(--transition);
  flex-shrink: 0;
}

.advanced-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

.advanced-drawer {
  overflow: hidden;
  max-height: 0;
  transition: max-height 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.advanced-drawer.open { max-height: 600px; }

.advanced-inner {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  margin-top: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* Slider */
.slider-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.slider-value {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  min-width: 42px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  flex: 1;
  height: 4px;
  border-radius: var(--radius-full);
  appearance: none;
  -webkit-appearance: none;
  background: var(--color-divider);
  cursor: pointer;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: var(--glow-sm);
  transition: transform var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }

input[type="range"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Color picker */
.color-input-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

input[type="color"] {
  width: 36px;
  height: 36px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: 2px;
  background: none;
  flex-shrink: 0;
  transition: border-color var(--transition);
}

input[type="color"]:hover { border-color: var(--color-primary); }
input[type="color"]:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.color-hex {
  flex: 1;
}

/* Error correction buttons */
.ec-group {
  display: flex;
  gap: var(--space-2);
}

.ec-btn {
  flex: 1;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-2) var(--space-1);
  text-align: center;
  transition: all var(--transition);
  min-height: 40px;
}

.ec-btn:hover { color: var(--color-text); border-color: var(--color-text-faint); }
.ec-btn.active { color: var(--color-primary); border-color: var(--color-primary); background: var(--color-primary-dim); }
.ec-btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* ============================
   BARCODE FORMAT SELECT
   ============================ */
.format-select-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.format-pill {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-3) var(--space-2);
  text-align: center;
  transition: all var(--transition);
  min-height: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
}

.format-pill:hover {
  color: var(--color-text);
  border-color: var(--color-text-faint);
}

.format-pill.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-dim);
}

.format-pill:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.format-pill-name { font-size: var(--text-xs); font-weight: 700; }
.format-pill-desc { font-size: 10px; color: var(--color-text-faint); line-height: 1.3; }
.format-pill.active .format-pill-desc { color: var(--color-primary-hover); }

/* ============================
   PREVIEW PANEL
   ============================ */
.preview-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.preview-box {
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-radius: var(--radius-lg);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  padding: var(--space-6);
  transition: box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

.preview-box.has-code {
  border-color: var(--color-primary);
  box-shadow: var(--glow-sm);
}

.preview-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-faint);
  text-align: center;
}

.preview-empty svg { opacity: 0.5; }

.preview-empty p {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

.preview-hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
  margin-top: var(--space-2);
}

#qr-preview-canvas {
  display: block;
  width: 100%;
  max-width: 256px;
  height: auto;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-sm);
}

#barcode-preview-svg {
  max-width: 100%;
  height: auto;
  background: #ffffff;
  border-radius: var(--radius-sm);
  padding: var(--space-3);
}

.preview-error {
  font-size: var(--text-sm);
  color: var(--color-error);
  text-align: center;
  padding: var(--space-4);
}

/* ============================
   EXPORT ACTIONS
   ============================ */
.export-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.btn-primary,
.btn-secondary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-5);
  transition: all var(--transition);
  min-height: 44px;
  text-align: center;
  text-decoration: none;
  width: 100%;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  box-shadow: var(--glow-sm);
  color: var(--color-text-inverse);
}

.btn-secondary {
  background: none;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-primary-dim);
  box-shadow: var(--glow-sm);
}

.btn-ghost {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.btn-ghost:hover:not(:disabled) {
  border-color: var(--color-text-faint);
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.btn-primary:disabled,
.btn-secondary:disabled,
.btn-ghost:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.btn-ghost:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-success {
  background: var(--color-success) !important;
  border-color: var(--color-success) !important;
  color: #fff !important;
}

.export-divider {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin: var(--space-1) 0;
}

.reset-link {
  background: none;
  border: none;
  color: var(--color-text-faint);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-align: center;
  padding: var(--space-2);
  transition: color var(--transition);
  width: 100%;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.reset-link:hover { color: var(--color-error); }
.reset-link:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }

/* ============================
   TRUST SECTION
   ============================ */
.trust-section {
  background: var(--color-surface-offset);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-12) 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
}

.trust-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-dim);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  flex-shrink: 0;
}

.trust-item h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
}

.trust-item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============================
   FEATURES LIST
   ============================ */
.features-section {
  padding: var(--space-12) 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
}

.features-heading {
  font-size: var(--text-lg);
  margin-bottom: var(--space-6);
  text-align: center;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-3);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.feature-item svg { color: var(--color-primary); flex-shrink: 0; margin-top: 1px; }

.feature-item strong { display: block; font-size: var(--text-sm); color: var(--color-text); margin-bottom: 2px; }
.feature-item span { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ============================
   FOOTER
   ============================ */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-10) 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--color-text); }

.footer-support {
  font-size: var(--text-sm);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  transition: all var(--transition);
}

.footer-support:hover {
  background: var(--color-primary-dim);
  box-shadow: var(--glow-sm);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-version {
  font-family: var(--font-display);
  letter-spacing: 0.04em;
  color: var(--color-primary);
  opacity: 0.6;
}

/* ============================
   FAQ / PROSE PAGES
   ============================ */
.prose-page {
  padding: var(--space-16) 0;
  max-width: var(--content-narrow);
  margin: 0 auto;
}

.prose-page h1 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

.prose-page h2 {
  font-size: var(--text-base);
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.faq-list { display: flex; flex-direction: column; gap: var(--space-6); }

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.faq-item h2 {
  color: var(--color-primary);
  font-size: var(--text-base);
  margin-bottom: var(--space-3);
}

.faq-item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.prose-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.prose-section p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.prose-section p:last-child { margin-bottom: 0; }

/* ============================
   RESPONSIVE — MOBILE FIRST
   ============================ */
/* ============================
   MOBILE TAB BAR — hidden on desktop
   ============================ */
.mobile-tab-bar { display: none; }
.mobile-tab { display: none; }

/* ============================
   RESPONSIVE — MOBILE FIRST
   ============================ */
@media (max-width: 900px) {
  /* Tab bar */
  .mobile-tab-bar {
    display: flex;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-1);
    gap: var(--space-1);
    margin-bottom: var(--space-4);
  }

  .mobile-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border: 1px solid transparent;
    background: transparent;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition);
    min-height: 44px;
  }

  .mobile-tab.is-active {
    background: var(--color-primary-dim);
    color: var(--color-primary);
    border-color: rgba(0, 212, 232, 0.25);
    box-shadow: var(--glow-sm);
  }

  @keyframes tab-pulse {
    0%, 100% { box-shadow: 0 0 4px rgba(0,212,232,0.25); }
    50% { box-shadow: 0 0 16px rgba(0,212,232,0.6); }
  }

  .mobile-tab.has-update {
    color: var(--color-primary);
    border-color: rgba(0,212,232,0.45);
    animation: tab-pulse 1.4s ease-in-out infinite;
  }

  /* Panel switching */
  [data-mobile-panel] { display: none; }
  [data-mobile-panel].mobile-active { display: block; }

  /* Grid */
  .generator-grid {
    grid-template-columns: 1fr;
    overflow: hidden;
  }

  /* Panel sizing */
  .sheikah-panel {
    padding: var(--space-4);
    width: 100%;
    box-sizing: border-box;
  }

  .preview-box { min-height: 280px; }

  #qr-preview-canvas { max-width: 100%; }
  #barcode-preview-svg { max-width: 100%; }

  /* Export buttons — 2 column */
  .export-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
  }

  .export-actions .btn-ghost,
  .export-actions .export-divider,
  .export-actions .reset-link {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .container { padding: 0 var(--space-4); }

  .hero { padding: var(--space-10) 0 var(--space-8); }

  .trust-grid { grid-template-columns: 1fr; gap: var(--space-6); }

  .trust-chips { flex-direction: column; }

  .header-nav .nav-link { display: none; }
  .header-nav .btn-support { display: none; }
  .site-header { overflow: visible; }
  .header-donate-float { display: block; }

  .format-select-group { grid-template-columns: repeat(2, 1fr); }

  .field-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .logo-text { font-size: 10px; letter-spacing: 0.06em; }
  .logo-mark { width: 24px; height: 24px; }

  .preset-row { gap: var(--space-2); }

  .preview-box {
    min-height: 180px;
    padding: var(--space-4);
  }

  .generator-section {
    padding-bottom: var(--space-10);
  }
}

/* ============================
   FOCUS RING
   ============================ */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

.preview-box.has-code #qr-preview-svg,
.preview-box.has-code #barcode-preview-svg {
  animation: fadeIn 200ms ease;
}

/* ============================
   UTILITY
   ============================ */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ============================
   SECTION HEADING
   ============================ */
.section-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}