/* Halaman publik zetchat.id. Statis, tanpa JS dan tanpa build — aplikasinya
   sendiri ada di /app (SPA React). Aset merek diambil dari /app/ karena vite
   menaruh isi public/ di sana. */

:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f5f7fa;
  --surface-2: #eaf1fb; /* panel bernuansa merek */
  --line: #e1e7f0;
  --text: #16243a; /* navy wordmark ZetChat */
  --muted: #566a85;
  --brand: #2e86dc; /* biru logo, untuk bidang warna */
  --accent: #1f6fc0; /* versi gelap: dipakai untuk teks & tombol (kontras AA) */
  --btn-bg: #1f6fc0;
  --btn-fg: #ffffff;
  --r: 14px;
  --r-btn: 10px;
  --shadow: 0 1px 2px rgba(22, 36, 58, 0.06), 0 12px 32px rgba(22, 36, 58, 0.07);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0f1620;
    --surface: #16202c;
    --surface-2: #17293d;
    --line: #223044;
    --text: #e8edf4;
    --muted: #9aabc0;
    --brand: #5aa7ea;
    --accent: #7cb8ee;
    --btn-bg: #5aa7ea;
    --btn-fg: #0b1420;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px rgba(0, 0, 0, 0.35);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0;
  text-wrap: pretty;
}

a {
  color: var(--accent);
}

.wrap {
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: 24px;
}

/* Lewati navigasi: satu-satunya kontrol papan ketik yang perlu dilompati. */
.lewati {
  position: absolute;
  left: -9999px;
}
.lewati:focus {
  left: 24px;
  top: 12px;
  z-index: 10;
  background: var(--bg);
  padding: 8px 14px;
  border-radius: var(--r-btn);
  border: 1px solid var(--line);
}

/* ---------- navigasi ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 5;
  height: 68px;
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  width: 100%;
}

.merek {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}
.merek svg {
  width: 26px;
  height: 26px;
}

.nav-tautan {
  display: flex;
  gap: 24px;
  font-size: 15px;
}
.nav-tautan a {
  color: var(--muted);
  text-decoration: none;
}
.nav-tautan a:hover {
  color: var(--text);
}

.bahasa {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--r-btn);
  padding: 5px 10px;
}
.bahasa:hover {
  color: var(--text);
  border-color: var(--muted);
}

/* ---------- tombol ---------- */

.tombol,
.tombol-samar {
  display: inline-block;
  border-radius: var(--r-btn);
  padding: 12px 22px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.12s ease, background-color 0.12s ease, border-color 0.12s ease;
}
.tombol {
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid transparent;
}
.tombol:hover {
  background: color-mix(in srgb, var(--btn-bg) 88%, var(--text));
}
.tombol-samar {
  border: 1px solid var(--line);
  color: var(--text);
}
.tombol-samar:hover {
  border-color: var(--muted);
}
.tombol:active,
.tombol-samar:active {
  transform: translateY(1px);
}
.nav .tombol {
  padding: 9px 18px;
  font-size: 15px;
}

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

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
  padding-block: 88px 72px;
}
.hero h1 {
  font-size: clamp(38px, 5vw, 58px);
  font-weight: 700;
}
.hero p {
  margin-top: 20px;
  font-size: 19px;
  color: var(--muted);
  max-width: 46ch;
}
.hero-aksi {
  margin-top: 32px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Plat putih: logo lockup punya latar terang, jadi platnya tidak ikut tema. */
.plat {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 44px 40px;
  display: grid;
  place-items: center;
}
.plat img {
  width: 100%;
  max-width: 300px;
  height: auto;
  display: block;
}

/* ---------- pernyataan ---------- */

.pernyataan {
  border-top: 1px solid var(--line);
  padding-block: 72px;
}
.pernyataan p {
  font-size: clamp(21px, 2.4vw, 27px);
  line-height: 1.45;
  letter-spacing: -0.015em;
  max-width: 36ch;
}
.pernyataan .catatan {
  margin-top: 22px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 62ch;
  letter-spacing: 0;
}

/* ---------- fitur (bento) ---------- */

.fitur {
  padding-block: 72px;
}
.fitur h2,
.langkah h2,
.harga h2,
.kontak h2 {
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 700;
}
.kisi {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.sel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 26px 24px;
}
.sel h3 {
  font-size: 19px;
  font-weight: 650;
}
.sel p {
  margin-top: 10px;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--muted);
}
/* Lebar sel dipilih supaya tiap baris genap 6 kolom (4+2, 2+4, 3+3): kisi
   yang tersisa lubangnya terbaca sebagai tata letak rusak, bukan sebagai
   ritme. */
.s2 {
  grid-column: span 2;
}
.s3 {
  grid-column: span 3;
}
.s4 {
  grid-column: span 4;
}
.sel-merek {
  background: linear-gradient(135deg, var(--surface-2), var(--surface));
  border-color: color-mix(in srgb, var(--brand) 28%, var(--line));
}

/* ---------- cara kerja ---------- */

.langkah {
  border-top: 1px solid var(--line);
  padding-block: 72px;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 56px;
  align-items: start;
}
.langkah > div:first-child {
  position: sticky;
  top: 108px;
}
.langkah ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 30px;
}
.langkah li {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 18px;
  align-items: baseline;
}
.angka {
  font-size: 30px;
  font-weight: 700;
  color: color-mix(in srgb, var(--brand) 72%, var(--muted));
  font-variant-numeric: tabular-nums;
}
.langkah h3 {
  font-size: 20px;
  font-weight: 650;
}
.langkah li p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 16px;
}

/* ---------- harga ---------- */

.harga {
  margin-block: 16px 72px;
  background: var(--surface-2);
  border: 1px solid color-mix(in srgb, var(--brand) 24%, var(--line));
  border-radius: var(--r);
  padding: 56px 48px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}
.harga p {
  margin-top: 16px;
  color: var(--muted);
  max-width: 48ch;
}
.harga-aksi {
  justify-self: end;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ---------- kontak ---------- */

.kontak {
  border-top: 1px solid var(--line);
  padding-block: 72px;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 56px;
  align-items: start;
}
.kontak dl {
  margin: 0;
  display: grid;
  gap: 26px;
}
.kontak dt {
  font-size: 14px;
  font-weight: 650;
  color: var(--muted);
}
.kontak dd {
  margin: 6px 0 0;
  font-size: 17px;
  line-height: 1.55;
  max-width: 44ch;
}

/* ---------- isi halaman teks (tentang, privasi, ketentuan) ---------- */

.teks {
  padding-block: 64px 80px;
  max-width: 72ch;
}
.teks h1 {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 700;
}
.teks .terbit {
  margin-top: 14px;
  color: var(--muted);
  font-size: 15px;
}
.teks h2 {
  margin-top: 48px;
  font-size: 23px;
  font-weight: 650;
}
.teks h3 {
  margin-top: 30px;
  font-size: 18px;
  font-weight: 650;
}
.teks p,
.teks ul {
  margin-top: 14px;
  color: var(--muted);
  font-size: 16.5px;
}
.teks ul {
  padding-left: 22px;
  display: grid;
  gap: 8px;
}
.teks strong {
  color: var(--text);
  font-weight: 650;
}

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

.kaki {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding-block: 44px 40px;
  font-size: 15px;
}
.kaki .wrap {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  align-items: start;
}
.kaki p {
  color: var(--muted);
  font-size: 14.5px;
  margin-top: 12px;
  max-width: 34ch;
}
.kaki h4 {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 650;
  color: var(--text);
}
.kaki ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.kaki a {
  color: var(--muted);
  text-decoration: none;
}
.kaki a:hover {
  color: var(--text);
  text-decoration: underline;
}
.kaki-bawah {
  border-top: 1px solid var(--line);
  margin-top: 36px;
  padding-top: 22px;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- ponsel ---------- */

@media (max-width: 860px) {
  body {
    font-size: 16px;
  }
  .wrap {
    padding-inline: 20px;
  }
  .nav-tautan {
    display: none;
  }
  .hero,
  .langkah,
  .kontak,
  .harga,
  .kaki .wrap {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero {
    padding-block: 48px 56px;
  }
  .langkah > div:first-child {
    position: static;
  }
  .harga {
    padding: 36px 26px;
  }
  .harga-aksi {
    justify-self: start;
  }
  .kisi {
    grid-template-columns: 1fr;
  }
  .s2,
  .s3,
  .s4 {
    grid-column: auto;
  }
  .pernyataan,
  .fitur,
  .langkah,
  .kontak {
    padding-block: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tombol,
  .tombol-samar {
    transition: none;
  }
}