/*
Theme Name: AI 小小探險家
Theme URI: https://ai-education.isteam-tw.com
Author: iSTEAM Taiwan
Description: A lightweight bilingual theme for elementary AI education.
Version: 1.0.0
Text Domain: ai-little-explorers
*/

:root {
  --ink: #24324a;
  --muted: #62708a;
  --cream: #fffaf0;
  --sky: #dff4ff;
  --blue: #2878d0;
  --yellow: #ffd764;
  --coral: #ff826e;
  --mint: #7ed9b5;
  --purple: #8b78d1;
  --white: #fff;
  --shadow: 0 18px 50px rgba(44, 73, 113, .12);
  --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  line-height: 1.75;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
.wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 250, 240, .9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(40, 120, 208, .08);
}
.nav { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 900; }
.brand-mark { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 15px; background: var(--yellow); font-size: 25px; transform: rotate(-3deg); }
.brand small { display: block; color: var(--blue); font-size: 11px; letter-spacing: .08em; }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: 15px; font-weight: 700; }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--blue); }
.nav-cta { padding: 10px 17px; border-radius: 999px; background: var(--blue); color: var(--white) !important; }

.hero { overflow: hidden; padding: 70px 0 64px; background: radial-gradient(circle at 15% 10%, #fff6be 0, transparent 35%), linear-gradient(160deg, #e4f6ff, #fffaf0 58%); }
.hero-grid { display: grid; grid-template-columns: .82fr 1.18fr; align-items: center; gap: 52px; }
.eyebrow { display: inline-flex; gap: 8px; align-items: center; margin: 0 0 18px; padding: 7px 13px; border-radius: 999px; background: var(--white); color: var(--blue); font-size: 13px; font-weight: 900; box-shadow: 0 8px 24px rgba(40,120,208,.10); }
h1 { margin: 0; font-size: clamp(42px, 5.7vw, 76px); line-height: 1.08; letter-spacing: -.045em; }
h1 span { color: var(--blue); }
.hero-copy { margin: 24px 0 30px; color: var(--muted); font-size: 18px; }
.buttons { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; gap: 8px; padding: 13px 21px; border-radius: 999px; background: var(--blue); color: var(--white); text-decoration: none; font-weight: 900; box-shadow: 0 10px 24px rgba(40,120,208,.22); }
.button.alt { background: var(--white); color: var(--ink); box-shadow: none; border: 2px solid rgba(40,120,208,.14); }
.hero-art { position: relative; }
.hero-art img { width: 100%; aspect-ratio: 1.75; object-fit: cover; border-radius: 38px; box-shadow: var(--shadow); transform: rotate(1deg); }
.float-badge { position: absolute; padding: 10px 15px; border-radius: 18px; background: var(--white); box-shadow: var(--shadow); font-weight: 900; }
.float-badge.one { left: -22px; bottom: 30px; }
.float-badge.two { right: -15px; top: 28px; }

section { padding: 92px 0; }
.section-head { max-width: 720px; margin-bottom: 42px; }
.kicker { color: var(--coral); font-size: 13px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
h2 { margin: 8px 0 12px; font-size: clamp(32px, 4.2vw, 50px); line-height: 1.2; letter-spacing: -.035em; }
.section-head p { margin: 0; color: var(--muted); font-size: 17px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card { padding: 28px; border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); transition: transform .2s ease; }
.card:hover { transform: translateY(-5px); }
.icon { display: grid; place-items: center; width: 56px; height: 56px; margin-bottom: 20px; border-radius: 20px; background: var(--sky); font-size: 29px; }
.card:nth-child(2) .icon { background: #fff2c7; }
.card:nth-child(3) .icon { background: #e4f8ee; }
.card h3 { margin: 0 0 9px; font-size: 21px; }
.card p { margin: 0; color: var(--muted); }
.card .en { display: block; margin-top: 15px; color: var(--blue); font-size: 12px; font-weight: 900; letter-spacing: .06em; }

.courses { background: #eef8ff; }
.course-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.course { display: grid; grid-template-columns: 76px 1fr; gap: 20px; padding: 28px; border-radius: var(--radius); background: var(--white); }
.course-num { display: grid; place-items: center; width: 68px; height: 68px; border-radius: 24px; background: var(--yellow); font-size: 30px; }
.course:nth-child(2) .course-num { background: #ffdcd6; }
.course:nth-child(3) .course-num { background: #d9f6e9; }
.course:nth-child(4) .course-num { background: #e6e0fb; }
.course h3 { margin: 0 0 6px; font-size: 22px; }
.course p { margin: 0; color: var(--muted); }

.journey-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 50px; align-items: center; }
.room { min-height: 420px; display: grid; place-items: center; padding: 30px; border-radius: 42px; background: linear-gradient(145deg, #ffe9a9, #ffd8ce); box-shadow: var(--shadow); text-align: center; }
.room-scene { font-size: clamp(78px, 11vw, 144px); line-height: 1; }
.room p { margin: 24px 0 0; font-weight: 900; }
.steps { display: grid; gap: 15px; }
.step { display: grid; grid-template-columns: 48px 1fr; gap: 16px; align-items: start; padding: 18px; border-radius: 22px; background: var(--white); }
.step b { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 15px; background: var(--blue); color: var(--white); }
.step h3 { margin: 0 0 3px; }
.step p { margin: 0; color: var(--muted); }

.promise { background: #263a5b; color: var(--white); }
.promise-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.promise .kicker { color: var(--yellow); }
.promise p { color: #cfdbed; }
.values { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.value { padding: 20px; border-radius: 22px; background: rgba(255,255,255,.1); }
.value strong { display: block; margin-bottom: 4px; font-size: 18px; }
.value span { color: #cfdbed; font-size: 14px; }

.cta-box { padding: 55px; border-radius: 42px; background: linear-gradient(135deg, #ffdf7e, #ffb8a9); text-align: center; box-shadow: var(--shadow); }
.cta-box h2 { max-width: 760px; margin: 0 auto 15px; }
.cta-box p { max-width: 680px; margin: 0 auto 25px; color: #5d5260; }
.site-footer { padding: 34px 0; color: var(--muted); font-size: 14px; }
.footer-row { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .hero-grid, .journey-grid, .promise-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 48px; }
  .cards { grid-template-columns: 1fr; }
  .course-grid { grid-template-columns: 1fr; }
  .hero-art { margin-top: 8px; }
}
@media (max-width: 560px) {
  .wrap { width: min(100% - 26px, 1160px); }
  section { padding: 68px 0; }
  .hero-art img { border-radius: 25px; }
  .float-badge { display: none; }
  .course { grid-template-columns: 1fr; }
  .values { grid-template-columns: 1fr; }
  .cta-box { padding: 38px 20px; }
  .brand-text { font-size: 14px; }
}