/* ─────────────────────────────────────────────────────────────
QRC — style.css
Fonts: Syne (display) + DM Sans (body)
Aesthetic: Refined modern — dark navy accents, warm white bg,
generous spacing, precise typography
───────────────────────────────────────────────────────────── */

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

:root {
  --c-bg: #f8f7f4;
  --c-bg-alt: #f0efe9;
  --c-surface: #ffffff;
  --c-border: #e2e0d8;
  --c-text: #1a1917;
  --c-text-2: #5a5854;
  --c-accent: #1a2e4a;
  --c-accent-2: #2d4f7c;
  --c-highlight: #e8530a;
  --c-highlight-hover: #c94607;
  --c-error: #c93030;
  --f-display: 'Syne', sans-serif;
  --f-body: 'DM Sans', sans-serif;
  --gap: 1.5rem;
  --gap-sm: 0.75rem;
  --gap-lg: 3rem;
  --r: 0.75rem;
  --r-sm: 0.4rem;
  --r-lg: 1.25rem;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 4px 16px rgba(0,0,0,.08), 0 1px 4px rgba(0,0,0,.05);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.10), 0 2px 8px rgba(0,0,0,.06);
  --ease: cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--c-accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; }

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  padding: 0.65em 1.4em;
  border: 2px solid transparent;
  border-radius: var(--r-sm);
  font-family: var(--f-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s var(--ease), color .15s var(--ease), border-color .15s var(--ease), transform .1s var(--ease);
  white-space: nowrap;
  text-decoration: none !important;
}
.btn:active { transform: scale(.97); }
.btn--primary { background: var(--c-highlight); color: #fff; border-color: var(--c-highlight); }
.btn--primary:hover { background: var(--c-highlight-hover); border-color: var(--c-highlight-hover); }
.btn--outline { background: transparent; color: var(--c-accent); border-color: var(--c-accent); }
.btn--outline:hover { background: var(--c-accent); color: #fff; }
.btn--ghost { background: transparent; color: var(--c-text-2); border-color: var(--c-border); }
.btn--ghost:hover { background: var(--c-bg-alt); color: var(--c-text); }
.btn--sm { padding: 0.4em 0.9em; font-size: 0.82rem; }

/* ── Header ──────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248,247,244,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none !important;
}
.logo-mark {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -.03em;
  color: var(--c-accent);
}
.logo-tagline {
  font-size: 0.78rem;
  color: var(--c-text-2);
  font-weight: 400;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.site-nav a {
  font-size: 0.88rem;
  color: var(--c-text-2);
  font-weight: 500;
}
.site-nav a:hover { color: var(--c-text); text-decoration: none; }

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  padding: 4rem 0 2.5rem;
  text-align: center;
}
.hero-text h1 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -.03em;
  color: var(--c-accent);
  margin-bottom: 1rem;
}
.hero-text h1 em {
  font-style: normal;
  color: var(--c-highlight);
}
.hero-text p {
  font-size: 1.1rem;
  color: var(--c-text-2);
  max-width: 520px;
  margin: 0 auto;
}

/* ── Generator layout ────────────────────────────────────── */
.generator-wrap { padding: 0 0 5rem; }
.generator {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--gap-lg);
  align-items: start;
}
.generator__left { order: 1; }
.generator__right { order: 2; }

/* ── Type selector ───────────────────────────────────────── */
.type-selector {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
  margin-bottom: var(--gap);
}
.type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 0.75rem 0.5rem;
  border: 2px solid var(--c-border);
  border-radius: var(--r-sm);
  background: var(--c-surface);
  cursor: pointer;
  transition: border-color .15s var(--ease), background .15s var(--ease), transform .1s var(--ease);
}
.type-btn:hover { border-color: var(--c-accent-2); background: var(--c-bg-alt); }
.type-btn.active { border-color: var(--c-accent); background: var(--c-accent); }
.type-btn.active .type-btn__icon,
.type-btn.active .type-btn__label { color: #fff; }
.type-btn__icon { font-size: 1.3rem; line-height: 1; }
.type-btn__label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--c-text-2);
  letter-spacing: .02em;
  text-transform: uppercase;
}

/* ── Form card ───────────────────────────────────────────── */
.form-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--gap);
  box-shadow: var(--shadow-sm);
}
.form-error {
  background: #fff0f0;
  border: 1px solid #fca5a5;
  border-radius: var(--r-sm);
  color: var(--c-error);
  font-size: 0.88rem;
  padding: 0.6em 1em;
  margin-bottom: var(--gap-sm);
}
.form-area { display: flex; flex-direction: column; gap: var(--gap-sm); }
.field-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-sm);
}
label {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--c-text-2);
  letter-spacing: .02em;
}
input[type="text"],
input[type="url"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 0.6em 0.8em;
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm);
  font-family: var(--f-body);
  font-size: 0.92rem;
  color: var(--c-text);
  background: var(--c-bg);
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--c-accent-2);
  box-shadow: 0 0 0 3px rgba(45,79,124,.12);
  background: #fff;
}
textarea { resize: vertical; min-height: 80px; }
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%235a5854' d='M4.5 6l3.5 4 3.5-4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.6em center;
  background-size: 1.1em;
  padding-right: 2em;
}
.field-group--inline {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}
.field-group--inline input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
  accent-color: var(--c-accent);
}
.field-group--inline label { margin-bottom: 0; font-size: 0.9rem; }
.field-group--color {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}
.field-group--color label { flex: 1; }
.field-group--color input[type="color"] {
  width: 2.4rem;
  height: 2.2rem;
  padding: 0.15rem;
  border-radius: var(--r-sm);
  cursor: pointer;
  flex-shrink: 0;
}
.field-hint {
  font-size: 0.78rem;
  color: var(--c-text-2);
  margin-top: 0.25rem;
}

/* ── Preview card ────────────────────────────────────────── */
.preview-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--gap);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--gap-sm);
}
.preview-card__qr {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  background: var(--c-bg-alt);
  border-radius: var(--r);
  overflow: hidden;
  padding: 1rem;
}
.preview-card__qr canvas,
.preview-card__qr svg {
  max-width: 100%;
  height: auto;
}
.preview-card__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  width: 100%;
}

/* ── Style card ──────────────────────────────────────────── */
.style-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--gap);
  box-shadow: var(--shadow-sm);
  margin-top: var(--gap-sm);
}
.style-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--gap-sm);
}
.style-card__header h3 {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--c-accent);
}
.style-card__actions { display: flex; gap: 0.4rem; }
.style-grid { display: flex; flex-direction: column; gap: var(--gap-sm); }
.style-section {
  padding: var(--gap-sm) 0;
  border-bottom: 1px solid var(--c-border);
}
.style-section:last-child { border-bottom: none; padding-bottom: 0; }
.style-section h4 {
  font-family: var(--f-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-text-2);
  margin-bottom: 0.6rem;
}
input[type="range"] {
  width: 100%;
  accent-color: var(--c-accent);
  cursor: pointer;
}

/* Logo upload */
.logo-upload-wrap { display: flex; align-items: center; gap: 0.5rem; }
.logo-upload-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.4em 0.9em;
  background: var(--c-bg-alt);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--c-text);
  cursor: pointer;
  transition: background .15s var(--ease);
}
.logo-upload-btn:hover { background: var(--c-border); }
.logo-upload-btn input { display: none; }
.logo-preview {
  margin-top: 0.5rem;
  max-height: 48px;
  border-radius: var(--r-sm);
  border: 1px solid var(--c-border);
}

/* ── How it works ────────────────────────────────────────── */
.how-it-works {
  padding: 5rem 0;
  background: var(--c-accent);
}
.how-it-works h2 {
  font-family: var(--f-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  text-align: center;
  margin-bottom: 3rem;
  letter-spacing: -.02em;
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}
.step {
  text-align: center;
  padding: 2rem 1.5rem;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--r-lg);
}
.step__num {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-highlight);
  color: #fff;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 1.1rem;
  border-radius: 50%;
  margin: 0 auto 1rem;
}
.step h3 {
  font-family: var(--f-display);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
}
.step p { color: rgba(255,255,255,.65); font-size: 0.92rem; }

/* ── FAQ ─────────────────────────────────────────────────── */
.faq {
  padding: 5rem 0;
  background: var(--c-bg-alt);
}
.faq h2 {
  font-family: var(--f-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--c-accent);
  letter-spacing: -.02em;
  margin-bottom: 2rem;
  text-align: center;
}
.faq-list {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.faq-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
  overflow: hidden;
}
.faq-item summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--c-text);
  user-select: none;
}
.faq-item summary::after {
  content: '+';
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--c-text-2);
  transition: transform .2s var(--ease);
  flex-shrink: 0;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p {
  padding: 0 1.25rem 1rem;
  font-size: 0.9rem;
  color: var(--c-text-2);
}

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
  background: var(--c-accent);
  padding: 3rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--gap-lg);
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255,255,255,.12);
  margin-bottom: 1.5rem;
}
.footer-brand .logo-mark { color: #fff; font-size: 1.6rem; display: block; margin-bottom: 0.5rem; }
.footer-brand p { color: rgba(255,255,255,.5); font-size: 0.85rem; max-width: 240px; }
.footer-links h5 {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.4);
  margin-bottom: 0.75rem;
}
.footer-links { display: flex; flex-direction: column; gap: 0.4rem; }
.footer-links a { color: rgba(255,255,255,.65); font-size: 0.88rem; }
.footer-links a:hover { color: #fff; text-decoration: none; }
.footer-bottom { text-align: center; }
.footer-bottom p { color: rgba(255,255,255,.35); font-size: 0.82rem; }
.footer-bottom a { color: rgba(255,255,255,.55); }
.footer-bottom a:hover { color: #fff; text-decoration: none; }



/* ── Copy button ─────────────────────────────────────────── */
.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm);
  background: var(--c-surface);
  color: var(--c-text-2);
  cursor: pointer;
  flex-shrink: 0;
  transition: color .15s, border-color .15s, background .15s;
  vertical-align: middle;
}
.copy-btn:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
  background: var(--c-bg-alt);
}
.copy-btn--copied {
  color: #16a34a;
  border-color: #86efac;
  background: #f0fdf4;
}

/* ── QR Empty State ──────────────────────────────────────── */
.qr-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--c-text-2);
  text-align: center;
  pointer-events: none;
  user-select: none;
  padding: 2rem;
  width: 100%;
}
.qr-empty-state__icon {
  font-size: 3rem;
  opacity: 0.15;
  display: block;
}
.qr-empty-state p {
  font-size: 0.85rem;
  opacity: 0.5;
  line-height: 1.5;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .generator { grid-template-columns: 1fr; }
  .generator__right {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap);
    align-items: start;
  }
  .steps { grid-template-columns: 1fr; gap: var(--gap-sm); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .hero { display: none; }

  .generator {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .generator__left {
    order: 2;
    padding-top: var(--gap);
  }

  .generator__right {
    order: 1;
    display: block;
  }

  .preview-card {
    position: sticky;
    top: 60px;
    z-index: 50;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
    background: var(--c-surface);
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-top: none;
    border-bottom: 1px solid var(--c-border);
    box-shadow: 0 4px 12px rgba(0,0,0,.08);
    padding: 0.75rem 1rem;
    margin: 0 -1.5rem;
  }

  .preview-card__qr {
    width: 100%;
    min-height: unset;
    padding: 0.5rem;
  }

  .preview-card__actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    width: 100%;
  }

  .style-card { margin-top: var(--gap-sm); }
  .type-selector {
    grid-template-columns: repeat(5, 1fr);
    gap: 0.3rem;
  }
  .type-btn { padding: 0.5rem 0.2rem; }
  .type-btn__icon { font-size: 1.1rem; }
  .type-btn__label { font-size: 0.65rem; }
  .field-row { grid-template-columns: 1fr; }
  .site-nav a:not(.btn) { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--gap); }
}