/* t4_cards — Material-style floating cards on tinted background. */
:root {
  --c-bg: #f1f4f9;
  --c-paper: #ffffff;
  --c-ink: #14181f;
  --c-ink-soft: #5b6573;
  --c-line: #e4e8ef;
  --c-accent: #2b6cff;
  --c-radius: 16px;
  --c-radius-lg: 24px;
  --c-shadow-1: 0 1px 2px rgba(20,24,31,.05), 0 1px 3px rgba(20,24,31,.04);
  --c-shadow-2: 0 4px 10px rgba(20,24,31,.06), 0 1px 3px rgba(20,24,31,.05);
  --c-shadow-3: 0 12px 32px rgba(20,24,31,.1), 0 4px 8px rgba(20,24,31,.04);
}
.c-page { background: var(--c-bg); color: var(--c-ink); }

.c-bar { position: sticky; top: 0; background: rgba(241,244,249,.85);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent; transition: border-color .2s; z-index: 100; }
.c-bar[data-stuck] { border-bottom-color: var(--c-line); background: rgba(255,255,255,.9); }
.c-bar__row { max-width: 1180px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 24px; }
.c-bar__brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.02rem; }
.c-bar__brand img { border-radius: 8px; }
.c-bar nav { margin-left: auto; display: flex; gap: 26px; }
.c-bar nav a { font-size: .92rem; color: var(--c-ink-soft); transition: color .15s; }
.c-bar nav a:hover { color: var(--c-ink); }
.c-bar__cta { background: var(--c-ink); color: #fff; padding: 9px 18px;
  border-radius: 999px; font-size: .9rem; font-weight: 600; }
.c-bar__cta:hover { background: var(--c-accent); }
.c-bar__burger { display: none; background: none; border: 0; padding: 6px;
  flex-direction: column; gap: 4px; }
.c-bar__burger span { width: 20px; height: 2px; background: var(--c-ink); border-radius: 2px; }
@media (max-width: 880px) {
  .c-bar nav { position: fixed; top: 60px; left: 0; right: 0; background: #fff;
    border-top: 1px solid var(--c-line); padding: 20px 24px; flex-direction: column;
    transform: translateY(-110%); transition: transform .25s; margin-left: 0; }
  .c-bar nav[data-open] { transform: translateY(0); }
  .c-bar__cta { display: none; }
  .c-bar__burger { display: flex; }
}

.c-eyebrow { display: inline-block; text-transform: uppercase; letter-spacing: .12em;
  font-size: .72rem; font-weight: 700; color: var(--c-accent); margin-bottom: 14px; }
.c-eyebrow--centered { display: block; text-align: center; }

.c-btn { display: inline-flex; align-items: center; padding: 11px 22px; border-radius: 999px;
  font-weight: 600; font-size: .95rem; border: 1px solid transparent;
  transition: background .15s, color .15s, transform .05s; }
.c-btn:active { transform: translateY(1px); }
.c-btn--primary { background: var(--c-accent); color: #fff; }
.c-btn--primary:hover { filter: brightness(1.08); }
.c-btn--ghost { background: transparent; color: var(--c-ink); border-color: var(--c-line); }
.c-btn--ghost:hover { background: var(--c-paper); }
.c-btn--lg { padding: 14px 28px; font-size: 1rem; }

.c-hero { padding: 56px 24px 24px; }
.c-hero__card { max-width: 900px; margin: 0 auto; background: var(--c-paper);
  border-radius: var(--c-radius-lg); padding: 56px 48px; text-align: center;
  box-shadow: var(--c-shadow-3); }
.c-hero__card h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -.02em; margin-bottom: 16px; }
.c-hero__lead { color: var(--c-ink-soft); font-size: 1.1rem; max-width: 600px; margin: 0 auto 28px; }
.c-hero__cta { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 36px; }
.c-hero__stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  padding: 24px 0; border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line);
  margin: 0 0 36px; }
.c-hero__stats div { text-align: center; }
.c-hero__stats dt { font-size: 1.5rem; font-weight: 700; }
.c-hero__stats dd { color: var(--c-ink-soft); font-size: .86rem; margin: 4px 0 0; }
.c-hero__art img { border-radius: var(--c-radius); margin: 0 auto; box-shadow: var(--c-shadow-2); }
@media (max-width: 600px) {
  .c-hero__card { padding: 36px 22px; }
  .c-hero__stats { grid-template-columns: 1fr; }
}

.c-cards-stack { max-width: 900px; margin: 0 auto; padding: 0 24px;
  display: flex; flex-direction: column; gap: 24px; }
.c-card { background: var(--c-paper); border-radius: var(--c-radius); box-shadow: var(--c-shadow-1); }
.c-card__inner { padding: 40px; }
@media (max-width: 600px) { .c-card__inner { padding: 26px; } }

.c-prose { color: var(--c-ink); font-size: 1rem; line-height: 1.75; }
.c-prose h3 { font-size: 1.1rem; margin: 1.4em 0 .5em; }
.c-prose p { margin: 0 0 1em; color: var(--c-ink-soft); }

.c-reviews { display: flex; flex-direction: column; gap: 16px; }
.c-review { display: flex; gap: 14px; align-items: flex-start;
  padding: 18px; background: var(--c-bg); border-radius: 12px; }
.c-review__avatar { width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.05rem; flex-shrink: 0; }
.c-review__body { flex: 1; }
.c-review__body p { margin: 0 0 8px; }
.c-review__body footer { display: flex; gap: 10px; align-items: baseline;
  font-size: .85rem; color: var(--c-ink-soft); }
.c-review__rating { color: #fbbf24; letter-spacing: 1px; }

.c-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.c-gallery__item { margin: 0; border-radius: 12px; overflow: hidden; box-shadow: var(--c-shadow-1); }
.c-gallery__item img { width: 100%; display: block; }
@media (max-width: 600px) { .c-gallery { grid-template-columns: 1fr; } }

.c-faq details { background: var(--c-bg); border-radius: 12px; padding: 0 20px;
  margin-bottom: 8px; }
.c-faq summary { list-style: none; padding: 18px 0; cursor: pointer; font-weight: 600;
  display: flex; justify-content: space-between; gap: 16px; }
.c-faq summary::-webkit-details-marker { display: none; }
.c-faq summary::after { content: '+'; color: var(--c-accent); font-size: 1.2rem; line-height: 1; }
.c-faq details[open] summary::after { content: '−'; }
.c-faq details > p { padding: 0 0 18px; color: var(--c-ink-soft); margin: 0; }

.c-form { display: flex; flex-direction: column; gap: 14px; margin-top: 16px; }
.c-form label { display: flex; flex-direction: column; gap: 6px; font-size: .9rem;
  font-weight: 600; }
.c-form input, .c-form textarea { padding: 12px 14px; border: 1px solid var(--c-line);
  border-radius: 10px; background: var(--c-paper); font: inherit; }
.c-form input:focus, .c-form textarea:focus { outline: 0; border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(43,108,255,.15); }
.c-form button { align-self: flex-start; }
.c-form__ok { color: #1f7d52; font-weight: 600; }

.c-final { margin-top: 48px; padding: 64px 24px; background: var(--c-accent); color: #fff; }
.c-final__inner { max-width: 700px; margin: 0 auto; text-align: center; }
.c-final h2 { font-size: clamp(1.8rem, 3.5vw, 2.4rem); margin-bottom: 12px; }
.c-final p { margin-bottom: 24px; color: rgba(255,255,255,.85); }
.c-final .c-btn--primary { background: #fff; color: var(--c-accent); }
.c-final .c-btn--primary:hover { background: var(--c-bg); }