/* Day1Keeper — เว็บหน้าแนะนำ (day1keeper.com)
   HTML/CSS ล้วน ไม่มี framework — โหลดเร็ว Google อ่านได้ทุกตัวอักษร */

:root {
  --green: #2e6e5b;
  --green-dark: #1d4a3d;
  --green-soft: #e6f2ec;
  --gold: #e8b84b;
  --ink: #1b2a24;
  --muted: #56655e;
  --line: #dde8e2;
  --bg: #fbfaf6;
  --card: #ffffff;
  --radius: 20px;
  --shadow: 0 10px 30px rgba(29, 74, 61, 0.08);
  --max: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8f0ec;
    --muted: #a9bab2;
    --line: #2a3a33;
    --bg: #111916;
    --card: #17221e;
    --green-soft: #1c2f28;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "IBM Plex Sans Thai", "Noto Sans Thai", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
}

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

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

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ── ปุ่ม ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 26px; border-radius: 999px; font-weight: 700; font-size: 17px;
  text-decoration: none; transition: transform .15s ease, box-shadow .15s ease;
  border: 2px solid transparent;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 8px 20px rgba(46, 110, 91, .28); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--card); }
.btn-small { padding: 9px 18px; font-size: 15px; }

/* ── หัวเว็บ ─────────────────────────────────────────── */
header.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
header.top .wrap { display: flex; align-items: center; gap: 16px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--ink); text-decoration: none; }
.brand img { width: 34px; height: 34px; }
nav.links { display: flex; gap: 22px; margin-left: auto; }
nav.links a { color: var(--muted); text-decoration: none; font-size: 15px; }
nav.links a:hover { color: var(--ink); }
.lang {
  display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; font-size: 14px;
}
.lang a { padding: 5px 12px; text-decoration: none; color: var(--muted); }
.lang a[aria-current="true"] { background: var(--green); color: #fff; }
@media (max-width: 820px) { nav.links { display: none; } .lang { margin-left: auto; } .top .btn-small { display: none; } }

/* ── Hero ────────────────────────────────────────────── */
.hero { padding: 72px 0 56px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% -20% auto auto; width: 720px; height: 720px;
  background: radial-gradient(closest-side, rgba(46, 110, 91, .16), transparent);
  pointer-events: none;
}
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } .hero { padding-top: 40px; } }
.eyebrow {
  display: inline-block; background: var(--green-soft); color: var(--green);
  padding: 6px 14px; border-radius: 999px; font-weight: 700; font-size: 14px; margin-bottom: 18px;
}
h1 { font-size: clamp(34px, 5.2vw, 56px); line-height: 1.2; margin: 0 0 18px; letter-spacing: -.01em; }
h1 em { font-style: normal; color: var(--green); }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 28px; max-width: 34em; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.note { color: var(--muted); font-size: 14px; margin-top: 14px; }

/* โทรศัพท์จำลอง — ภาพประกอบ ไม่ใช่ภาพหน้าจอจริง */
.phone {
  width: min(340px, 100%); margin: 0 auto; background: var(--card); border-radius: 38px;
  padding: 16px; box-shadow: 0 30px 60px rgba(29, 74, 61, .18); border: 1px solid var(--line);
}
.phone .screen { background: var(--bg); border-radius: 26px; padding: 18px 14px; }
.phone .hello { font-weight: 800; font-size: 20px; margin: 4px 4px 12px; }
.chip-row { display: flex; gap: 8px; margin: 0 4px 12px; flex-wrap: wrap; }
.chip { background: var(--green-soft); color: var(--green); border-radius: 999px; padding: 4px 10px; font-size: 13px; font-weight: 600; }
.task {
  display: flex; align-items: center; gap: 12px; background: var(--card); border-radius: 16px;
  padding: 12px; margin-bottom: 10px; border: 1px solid var(--line);
}
.task .ico { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font-size: 20px; }
.task b { display: block; font-size: 15px; }
.task span { color: var(--muted); font-size: 13px; }
.task .done { margin-left: auto; border: 2px solid var(--green); color: var(--green); border-radius: 999px; font-size: 12px; padding: 3px 10px; font-weight: 700; }
.spend { background: var(--green); color: #fff; border-radius: 16px; padding: 14px; margin-top: 6px; }
.spend small { opacity: .85; }
.spend strong { display: block; font-size: 24px; }
.bars { display: flex; gap: 5px; align-items: flex-end; height: 44px; margin-top: 8px; }
.bars i { flex: 1; background: rgba(255, 255, 255, .55); border-radius: 3px; }
.bars i.now { background: var(--gold); }

/* ── Section ─────────────────────────────────────────── */
section { padding: 72px 0; }
section.alt { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.25; margin: 0 0 12px; }
.sub { color: var(--muted); font-size: 18px; margin: 0 0 40px; max-width: 42em; }
.center { text-align: center; }
.center .sub { margin-left: auto; margin-right: auto; }

.grid { display: grid; gap: 18px; }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .g4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 760px) { .g3 { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .g4 { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow);
}
section.alt .card { background: var(--bg); box-shadow: none; }
.card h3 { margin: 12px 0 6px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.icon {
  width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; font-size: 26px;
  background: var(--green-soft);
}
.module .icon { width: 46px; height: 46px; font-size: 23px; }
.module h3 { font-size: 18px; }
.module p { font-size: 15px; }
.tag { display: inline-block; margin-top: 10px; font-size: 13px; color: var(--muted); border: 1px dashed var(--line); border-radius: 999px; padding: 2px 10px; }

/* ── ความเป็นส่วนตัว ─────────────────────────────────── */
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.checks li { display: flex; gap: 12px; align-items: flex-start; }
.checks li::before {
  content: "✓"; flex: none; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  background: var(--green); color: #fff; font-size: 14px; font-weight: 800; margin-top: 2px;
}
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.honest { background: var(--green-soft); border-radius: var(--radius); padding: 22px; color: var(--ink); font-size: 16px; }

/* ── ขั้นตอน ─────────────────────────────────────────── */
.step .num {
  width: 38px; height: 38px; border-radius: 50%; background: var(--gold); color: #3b2a00;
  display: grid; place-items: center; font-weight: 800;
}

/* ── FAQ ─────────────────────────────────────────────── */
details { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px 22px; margin-bottom: 12px; }
details summary { cursor: pointer; font-weight: 700; font-size: 18px; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
details summary::after { content: "+"; color: var(--green); font-size: 22px; line-height: 1; }
details[open] summary::after { content: "–"; }
details p { color: var(--muted); margin: 12px 0 0; }

/* ── CTA ท้าย ─────────────────────────────────────────── */
.final {
  background: linear-gradient(135deg, #3c8f75, #1d4a3d); color: #fff; border-radius: 28px;
  padding: 56px 28px; text-align: center;
}
.final h2 { color: #fff; }
.final p { color: rgba(255, 255, 255, .85); margin: 0 0 26px; font-size: 18px; }
.final .btn-primary { background: #fff; color: var(--green-dark); }

/* ── ท้ายเว็บ ─────────────────────────────────────────── */
footer { padding: 40px 0 56px; color: var(--muted); font-size: 15px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; }
footer a { color: var(--muted); }
footer .grow { flex: 1; }

/* ── หน้าเอกสาร (นโยบาย/เงื่อนไข) ───────────────────── */
.doc { max-width: 760px; margin: 0 auto; padding: 48px 20px 72px; }
.doc h1 { font-size: clamp(30px, 4vw, 40px); }
.doc h2 { font-size: 22px; margin-top: 36px; }
.doc p { white-space: pre-line; color: var(--ink); }
.draft { background: #fff4d6; color: #5a4300; border-radius: 14px; padding: 14px 18px; font-size: 15px; }
@media (prefers-color-scheme: dark) { .draft { background: #3a3014; color: #f3dfa6; } }

:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; border-radius: 6px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }