/* =====================================================================
   Intellidwell QR Generator — qr.css
   Site: qr.intellidwell.net
   ===================================================================== */

/* ── Design tokens ─────────────────────────────────────────────── */
:root {
  --bg:            #0b0d14;
  --bg-card:       rgba(15, 18, 30, 0.82);
  --bg-card-solid: #0f121e;
  --bg-surface:    rgba(255,255,255,0.04);
  --bg-input:      rgba(255,255,255,0.06);

  --primary:       #6366f1;          /* indigo */
  --primary-glow:  rgba(99,102,241,.35);
  --accent:        #22d3ee;          /* cyan */
  --accent-glow:   rgba(34,211,238,.25);
  --success:       #10b981;
  --danger:        #f87171;

  --text:          #e8eaf4;
  --text-secondary:#8b8fa8;
  --text-muted:    #525774;

  --border:        rgba(255,255,255,0.08);
  --border-focus:  rgba(99,102,241,.6);

  --radius-sm:     8px;
  --radius:        14px;
  --radius-lg:     22px;

  --font-sans:     'Inter', system-ui, sans-serif;
  --font-display:  'Outfit', var(--font-sans);
  --font-mono:     'Roboto Mono', monospace;

  --transition:    0.22s cubic-bezier(.4,0,.2,1);
  --shadow-card:   0 8px 40px rgba(0,0,0,.55);
  --shadow-btn:    0 4px 24px rgba(99,102,241,.45);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ── Animated background orbs ───────────────────────────────────── */
.bg-orbs {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.18;
  animation: float 20s ease-in-out infinite;
}
.orb-1 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, #6366f1, transparent 70%);
  top: -200px; left: -200px;
  animation-duration: 22s;
}
.orb-2 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #22d3ee, transparent 70%);
  bottom: -150px; right: -150px;
  animation-duration: 28s;
  animation-delay: -8s;
}
.orb-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #a78bfa, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  animation-duration: 18s;
  animation-delay: -4s;
}
@keyframes float {
  0%,100% { transform: translateY(0) scale(1); }
  50%      { transform: translateY(-40px) scale(1.05); }
}
.orb-3 { animation-name: float3; }
@keyframes float3 {
  0%,100% { transform: translate(-50%,-50%) scale(1); }
  50%      { transform: translate(-50%,-54%) scale(1.08); }
}

/* ── Top nav-bar ────────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11,13,20,.85);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 58px;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .5rem;
  text-decoration: none;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -.02em;
}
.brand-icon {
  width: 30px; height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem;
  font-weight: 800;
  flex-shrink: 0;
}
.brand-name  { font-size: 1rem; }
.brand-sep   { color: var(--text-muted); margin: 0 .1rem; }
.brand-product {
  color: var(--accent);
  font-size: .95rem;
}

.topbar-right { margin-left: auto; }

.badge-live {
  display: flex;
  align-items: center;
  gap: .45rem;
  font-size: .75rem;
  font-weight: 600;
  color: var(--success);
  background: rgba(16,185,129,.12);
  border: 1px solid rgba(16,185,129,.25);
  border-radius: 999px;
  padding: .28rem .75rem;
  letter-spacing: .04em;
}
.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot {
  0%,100% { opacity: 1; }
  50%      { opacity: .4; }
}

/* ── Hero ───────────────────────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 4rem 1.5rem 2.5rem;
}
.hero-inner { max-width: 680px; margin: 0 auto; }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: .9rem;
}
.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Main two-column layout ─────────────────────────────────────── */
.main-wrapper {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto 2rem;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 1.75rem;
  align-items: start;
}

/* ── Shared card base ───────────────────────────────────────────── */
.controls-col,
.preview-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.controls-col {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* ── Field groups ───────────────────────────────────────────────── */
.field-group { display: flex; flex-direction: column; gap: .5rem; }

.field-label {
  font-size: .83rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: .04em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.char-counter {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--text-muted);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
}

.field-textarea,
.field-select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: .95rem;
  padding: .75rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: vertical;
}
.field-textarea:focus,
.field-select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}
.field-textarea::placeholder { color: var(--text-muted); }
.field-select { appearance: none; cursor: pointer; }

.field-hint {
  font-size: .8rem;
  color: var(--text-muted);
}

.select-wrap { position: relative; }
.select-wrap::after {
  content: '›';
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%) rotate(90deg);
  color: var(--text-secondary);
  pointer-events: none;
  font-size: 1.1rem;
}

/* ── Range slider ───────────────────────────────────────────────── */
.field-range {
  width: 100%;
  appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-input);
  outline: none;
  cursor: pointer;
  accent-color: var(--primary);
}
.field-range::-webkit-slider-thumb {
  appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  transition: box-shadow var(--transition);
}
.field-range:hover::-webkit-slider-thumb {
  box-shadow: 0 0 0 5px var(--primary-glow);
}
.range-val {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--accent);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
}

/* ── Color pickers ──────────────────────────────────────────────── */
.color-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.color-field { display: flex; flex-direction: column; gap: .5rem; }
.color-swatch-wrap {
  display: flex;
  align-items: center;
  gap: .75rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .55rem .85rem;
}
.color-native {
  width: 32px; height: 32px;
  border: none;
  border-radius: 6px;
  background: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}
.color-native::-webkit-color-swatch-wrapper { padding: 0; border-radius: 6px; }
.color-native::-webkit-color-swatch        { border: none; border-radius: 5px; }
.color-hex {
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--text-secondary);
}

/* ── Quick-fill chips ───────────────────────────────────────────── */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.chip {
  padding: .35rem .9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: .8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}
.chip:hover {
  background: var(--primary-glow);
  border-color: var(--primary);
  color: var(--text);
  transform: translateY(-1px);
}
.chip:active { transform: translateY(0); }

/* ── Advanced block ─────────────────────────────────────────────── */
.advanced-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-surface);
  transition: background var(--transition);
}
.advanced-block[open] { background: rgba(255,255,255,.025); }

.advanced-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 1.1rem;
  cursor: pointer;
  list-style: none;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-secondary);
  user-select: none;
  transition: color var(--transition);
}
.advanced-toggle:hover { color: var(--text); }
.advanced-block[open] .advanced-toggle { color: var(--text); }
.toggle-arrow {
  font-size: 1.1rem;
  transition: transform var(--transition);
  display: inline-block;
}
.advanced-block[open] .toggle-arrow { transform: rotate(90deg); }

.advanced-grid {
  padding: 1rem 1.1rem 1.25rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.color-row { grid-column: 1 / -1; }

/* ── Generate button ────────────────────────────────────────────── */
.btn-generate {
  width: 100%;
  padding: 1rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary) 0%, #818cf8 50%, var(--accent) 100%);
  background-size: 200% 200%;
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .02em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .65rem;
  box-shadow: var(--shadow-btn);
  transition: transform var(--transition), box-shadow var(--transition), background-position var(--transition);
  background-position: 0% 50%;
}
.btn-generate:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99,102,241,.6);
  background-position: 100% 50%;
}
.btn-generate:active:not(:disabled) { transform: translateY(0); }
.btn-generate:disabled {
  opacity: .5;
  cursor: not-allowed;
  transform: none;
}
.btn-icon { font-size: 1.15rem; }

/* ── Error message ──────────────────────────────────────────────── */
.error-msg {
  background: rgba(248,113,113,.12);
  border: 1px solid rgba(248,113,113,.35);
  border-radius: var(--radius-sm);
  color: #fca5a5;
  padding: .75rem 1rem;
  font-size: .88rem;
  animation: fadeIn .2s ease;
}
@keyframes fadeIn { from { opacity:0; transform:translateY(-4px); } to { opacity:1; transform:none; } }

/* ── Preview column ─────────────────────────────────────────────── */
.preview-col { position: sticky; top: 78px; }

.preview-card {
  min-height: 380px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.75rem;
  position: relative;
  overflow: hidden;
}
/* shimmer border on card */
.preview-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(99,102,241,.4), rgba(34,211,238,.2), transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* Empty state */
.preview-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .85rem;
  text-align: center;
  color: var(--text-muted);
  font-size: .9rem;
}
.preview-empty-icon {
  width: 80px; height: 80px;
  color: var(--text-muted);
  opacity: .5;
}
.preview-empty-sub { font-size: .8rem; color: var(--text-muted); }

/* Result */
.preview-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
  width: 100%;
  animation: fadeIn .3s ease;
}

.preview-img-wrap {
  background: #fff;
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: 0 4px 24px rgba(0,0,0,.3);
  max-width: 240px;
  width: 100%;
}
.preview-img-wrap img,
.preview-img-wrap svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}

.preview-meta {
  font-size: .78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-align: center;
}

.btn-download {
  width: 100%;
  max-width: 240px;
  padding: .7rem 1.2rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(34,211,238,.35);
  background: rgba(34,211,238,.08);
  color: var(--accent);
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-download:hover {
  background: rgba(34,211,238,.16);
  box-shadow: 0 0 16px var(--accent-glow);
  transform: translateY(-1px);
}

/* Spinner */
.preview-spinner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: rgba(11,13,20,.65);
  backdrop-filter: blur(6px);
  border-radius: inherit;
  color: var(--text-secondary);
  font-size: .9rem;
  font-weight: 500;
}
.spinner-ring {
  width: 44px; height: 44px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── How-it-works strip ─────────────────────────────────────────── */
.how-strip {
  position: relative;
  z-index: 1;
  background: rgba(255,255,255,.025);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 3rem 1.5rem;
  margin-top: 2rem;
}
.how-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}
.how-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .6rem;
}
.how-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  opacity: .5;
  line-height: 1;
}
.how-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}
.how-desc {
  font-size: .88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.how-divider {
  font-size: 1.5rem;
  color: var(--text-muted);
  padding-top: 1.8rem;
  flex-shrink: 0;
}

/* ── Footer ─────────────────────────────────────────────────────── */
.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem 1.5rem;
  font-size: .82rem;
  color: var(--text-muted);
}
.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-link:hover { color: var(--accent); }

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .main-wrapper {
    grid-template-columns: 1fr;
  }
  .preview-col { position: static; }
}

@media (max-width: 600px) {
  .hero { padding: 2.5rem 1rem 1.5rem; }
  .controls-col { padding: 1.25rem; }
  .advanced-grid { grid-template-columns: 1fr; }
  .how-inner {
    flex-direction: column;
    gap: 1.5rem;
  }
  .how-divider { display: none; }
}