/* ============================================================
   Colorimeter — landing site
   Palette derivata dalle anteprime App Store (gerbera + accenti)
   ============================================================ */

:root {
  --pink: #d9418c;
  --pink-deep: #b83274;
  --coral: #e95e3c;
  --amber: #f9a825;
  --indigo: #3f51b5;
  --green: #4c8c3f;
  --ink: #26262e;
  --ink-soft: #3c3c46;
  --grey: #565662;
  --grey-light: #8a8a96;
  --bg: #fff8fa;
  --card: #ffffff;
  --line: rgba(38, 38, 46, 0.08);
  --shadow: 0 24px 60px -24px rgba(38, 38, 46, 0.25);
  --radius: 24px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a { color: var(--pink); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: min(1120px, 92vw); margin: 0 auto; }

/* ------------------------------------------------ nav */

.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  background: rgba(255, 248, 250, 0.75);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; gap: 28px;
  padding: 14px 0;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.05rem; color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand svg { width: 28px; height: 28px; }
.nav-links {
  display: flex; gap: 22px; margin-left: auto;
  font-size: 0.95rem; font-weight: 500;
}
.nav-links a { color: var(--ink-soft); }
.nav-links a:hover { color: var(--pink); text-decoration: none; }
.lang-switch {
  font-size: 0.85rem; font-weight: 700; letter-spacing: 0.04em;
  color: var(--grey); border: 1px solid var(--line);
  padding: 6px 12px; border-radius: 999px; background: var(--card);
}
.lang-switch:hover { color: var(--pink); text-decoration: none; border-color: var(--pink); }

@media (max-width: 760px) {
  .nav-links { display: none; }
  .lang-switch { margin-left: auto; }
}

/* ------------------------------------------------ buttons */

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 600; font-size: 1rem;
  padding: 14px 26px; border-radius: 999px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-dark {
  background: var(--ink); color: #fff;
  box-shadow: 0 12px 30px -12px rgba(38, 38, 46, 0.5);
}
.btn-dark:hover { box-shadow: 0 18px 40px -14px rgba(38, 38, 46, 0.55); }
.btn-ghost {
  color: var(--ink); background: transparent;
  border: 1.5px solid var(--line);
}
.btn small { display: block; font-size: 0.68rem; font-weight: 500; opacity: 0.75; line-height: 1.1; text-align: left; }
.btn .btn-big { font-size: 1.02rem; font-weight: 700; line-height: 1.15; }

/* ------------------------------------------------ hero */

.hero {
  position: relative;
  padding: 84px 0 96px;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(217, 65, 140, 0.16), transparent 65%),
    radial-gradient(700px 420px at -10% 30%, rgba(249, 168, 37, 0.14), transparent 60%),
    linear-gradient(180deg, #fdeaef 0%, var(--bg) 78%);
}
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 56px; align-items: center;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.82rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--pink-deep);
  background: rgba(217, 65, 140, 0.1);
  border: 1px solid rgba(217, 65, 140, 0.22);
  padding: 8px 16px; border-radius: 999px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 3.9rem);
  line-height: 1.06; letter-spacing: -0.025em;
  margin-bottom: 20px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--pink), var(--coral));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero .lede {
  font-size: 1.18rem; color: var(--grey);
  max-width: 34em; margin-bottom: 34px;
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-note { margin-top: 18px; font-size: 0.85rem; color: var(--grey-light); }

/* sampler (demo interattiva) */

.sampler {
  position: relative;
  border-radius: 28px; overflow: hidden;
  box-shadow: var(--shadow);
  cursor: crosshair;
  touch-action: none;
}
.sampler img { width: 100%; user-select: none; -webkit-user-drag: none; }
.sampler-loupe {
  position: absolute; width: 54px; height: 54px;
  border: 4px solid #fff; border-radius: 50%;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3), inset 0 0 0 1px rgba(0,0,0,0.12);
  transform: translate(-50%, -50%);
  pointer-events: none; opacity: 0;
  transition: opacity 0.15s ease;
}
.sampler:hover .sampler-loupe { opacity: 1; }
.sampler-chip {
  position: absolute; left: 16px; bottom: 16px;
  display: flex; align-items: center; gap: 12px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: 16px; padding: 10px 16px 10px 10px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.18);
}
.sampler-swatch {
  width: 40px; height: 40px; border-radius: 11px;
  background: #c16a67;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
  transition: background 0.08s linear;
}
.sampler-hex { font-family: var(--mono); font-weight: 700; font-size: 1.06rem; }
.sampler-hint { font-size: 0.72rem; color: var(--grey); }
.sampler-badge {
  position: absolute; top: 16px; right: 16px;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.05em;
  text-transform: uppercase; color: #fff;
  background: rgba(38, 38, 46, 0.62);
  backdrop-filter: blur(10px);
  padding: 7px 13px; border-radius: 999px;
}

/* toast copia */

.toast {
  position: fixed; left: 50%; bottom: 34px; z-index: 90;
  transform: translate(-50%, 20px);
  background: var(--ink); color: #fff;
  font-weight: 600; font-size: 0.92rem;
  padding: 12px 22px; border-radius: 999px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ------------------------------------------------ trust strip */

.trust {
  padding: 26px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.trust-inner {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 12px 34px;
  font-size: 0.95rem; font-weight: 600; color: var(--ink-soft);
}
.trust-inner span { display: inline-flex; align-items: center; gap: 8px; }
.trust-inner .dot { width: 9px; height: 9px; border-radius: 50%; }

/* ------------------------------------------------ sections */

section { padding: 92px 0; }
.section-head { max-width: 640px; margin-bottom: 54px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker {
  font-size: 0.8rem; font-weight: 800; letter-spacing: 0.1em;
  text-transform: uppercase; margin-bottom: 12px;
}
h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.12; letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.section-head p { color: var(--grey); font-size: 1.08rem; }

/* problem */

.problem { background: linear-gradient(180deg, var(--bg), #fdf3e7 120%); }
.problem-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
@media (max-width: 860px) { .problem-grid { grid-template-columns: 1fr; } }
.problem-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px 28px;
}
.problem-card .emoji { font-size: 1.9rem; display: block; margin-bottom: 14px; }
.problem-card h3 { font-size: 1.12rem; margin-bottom: 8px; }
.problem-card p { color: var(--grey); font-size: 0.97rem; }

/* features alternate */

.feature-row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
  padding: 46px 0;
}
@media (max-width: 860px) {
  .feature-row { grid-template-columns: 1fr; gap: 30px; }
  .feature-row .shot { order: -1; }
}
.feature-row .shot img {
  width: min(320px, 78%); margin: 0 auto;
  border-radius: 36px;
  box-shadow: var(--shadow);
  border: 6px solid #17171c;
}
.feature-row h3 { font-size: 1.55rem; letter-spacing: -0.015em; margin-bottom: 12px; }
.feature-row p { color: var(--grey); margin-bottom: 16px; }
.feature-row ul { list-style: none; }
.feature-row li {
  padding-left: 28px; position: relative; margin-bottom: 9px;
  color: var(--ink-soft); font-size: 0.98rem;
}
.feature-row li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  font-weight: 800;
}
.tag {
  display: inline-block; font-size: 0.75rem; font-weight: 800;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 6px 13px; border-radius: 999px; margin-bottom: 14px;
}

/* science (authority) */

.science {
  background: #1d1d24; color: #f2f2f5;
  border-radius: 44px;
  width: min(1180px, 96vw); margin: 0 auto;
}
.science h2, .science .kicker { color: #fff; }
.science .section-head p { color: #b9b9c4; }
.science-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 860px) { .science-grid { grid-template-columns: 1fr; } }
.science-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius); padding: 30px 28px;
}
.science-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.science-card p { color: #b9b9c4; font-size: 0.95rem; }
.science-card .num {
  font-family: var(--mono); font-size: 0.8rem; font-weight: 700;
  color: var(--amber); display: block; margin-bottom: 14px;
}

/* pledge (ad-free) */

.pledge { text-align: center; }
.pledge h2 { font-size: clamp(2rem, 4.4vw, 3.2rem); max-width: 17em; margin: 0 auto 18px; }
.pledge .lede { color: var(--grey); font-size: 1.12rem; max-width: 42em; margin: 0 auto 40px; }
.pledge-pills { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }
.pledge-pill {
  font-weight: 700; font-size: 0.98rem;
  background: var(--card); border: 1px solid var(--line);
  padding: 14px 24px; border-radius: 999px;
  box-shadow: 0 10px 26px -18px rgba(38, 38, 46, 0.4);
}

/* CTA finale */

.cta-final {
  background:
    radial-gradient(700px 380px at 50% -20%, rgba(217, 65, 140, 0.2), transparent 70%),
    linear-gradient(180deg, #fdeaef, var(--bg));
  text-align: center;
}
.cta-final h2 { max-width: 16em; margin: 0 auto 16px; }
.cta-final p { color: var(--grey); margin-bottom: 34px; }

/* ------------------------------------------------ pagine interne */

.page-hero { padding: 70px 0 40px; }
.page-hero h1 { font-size: clamp(2rem, 4.4vw, 3rem); letter-spacing: -0.02em; margin-bottom: 12px; }
.page-hero p { color: var(--grey); font-size: 1.1rem; max-width: 40em; }

.prose { max-width: 760px; }
.prose h2 { font-size: 1.45rem; margin: 44px 0 12px; }
.prose h3 { font-size: 1.1rem; margin: 26px 0 8px; }
.prose p, .prose li { color: var(--ink-soft); font-size: 1.02rem; }
.prose ul { padding-left: 22px; margin: 10px 0; }
.prose .updated { font-size: 0.88rem; color: var(--grey-light); }
.callout {
  background: rgba(217, 65, 140, 0.07);
  border: 1px solid rgba(217, 65, 140, 0.2);
  border-radius: 18px; padding: 22px 24px; margin: 26px 0;
}
.callout strong { color: var(--pink-deep); }

/* support cards + FAQ */

.help-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 30px 0 10px; }
@media (max-width: 860px) { .help-grid { grid-template-columns: 1fr; } }
.help-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 24px;
}
.help-card h3 { font-size: 1.06rem; margin-bottom: 8px; }
.help-card p { color: var(--grey); font-size: 0.94rem; }

.faq { max-width: 760px; }
.faq details {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 18px; padding: 0 24px; margin-bottom: 12px;
}
.faq summary {
  cursor: pointer; font-weight: 650; font-size: 1.03rem;
  padding: 20px 0; list-style: none; position: relative; padding-right: 36px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem; font-weight: 400; color: var(--pink);
  transition: transform 0.2s ease;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { color: var(--grey); padding: 0 0 20px; font-size: 0.98rem; }

/* ------------------------------------------------ footer */

footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 60px; margin-top: 40px;
  font-size: 0.92rem; color: var(--grey);
}
.footer-inner { display: flex; flex-wrap: wrap; gap: 20px 40px; align-items: center; }
.footer-inner .brand { font-size: 0.98rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; margin-left: auto; }
.footer-links a { color: var(--grey); }
.footer-links a:hover { color: var(--pink); }
.footer-note { width: 100%; font-size: 0.82rem; color: var(--grey-light); }

/* ------------------------------------------------ reveal on scroll */

.reveal {
  opacity: 0; transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}