/* ============================================================
   中華民國競技羽球發展協會 — 視覺設計系統
   概念：以羽球飛行弧線作為貫穿全站的識別線索，
         象徵「報名 → 抽籤 → 比賽 → 成績」的賽事旅程。
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700;900&family=Oswald:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* 色彩 — 取材自球場與球具 */
  --court-green: #14332C;      /* 場地墨綠：主色，導覽列／頁尾 */
  --court-green-light: #1E4A3F;
  --feather-cream: #FBF8F1;    /* 羽球白：主背景 */
  --line-charcoal: #202521;    /* 界線墨黑：正文文字 */
  --feather-chartreuse: #C7D94A; /* 灑金黃綠：主要行動按鈕／強調 */
  --match-red: #C1442E;        /* 賽場橘紅：警示、NEW、截止倒數 */
  --neutral-grey: #6E7369;     /* 次要文字、邊框 */
  --neutral-grey-light: #E4E0D4;
  --card-bg: #FFFFFF;

  --font-display: 'Noto Sans TC', sans-serif;
  --font-eyebrow: 'Oswald', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 2px 10px rgba(20, 51, 44, 0.08);
  --shadow-card-hover: 0 8px 24px rgba(20, 51, 44, 0.14);
  --max-width: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-display);
  background: var(--feather-cream);
  color: var(--line-charcoal);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 排版工具 ---------- */
.eyebrow {
  font-family: var(--font-eyebrow);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 13px;
  font-weight: 600;
  color: var(--court-green);
}
.eyebrow.on-dark { color: var(--feather-chartreuse); }

h1, h2, h3, h4 { font-weight: 900; margin: 0 0 0.5em; line-height: 1.3; }
h1 { font-size: clamp(32px, 5vw, 52px); }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: 20px; }
p { margin: 0 0 1em; }
.text-muted { color: var(--neutral-grey); }
.mono { font-family: var(--font-mono); }

/* ---------- 導覽列 ---------- */
.site-header {
  background: var(--court-green);
  color: var(--feather-cream);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--feather-cream);
}
.brand .brand-mark { flex-shrink: 0; }
.brand small {
  display: block;
  font-family: var(--font-eyebrow);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--feather-chartreuse);
  font-weight: 500;
}
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 15px;
}
.nav-links a {
  opacity: 0.85;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: opacity .2s, border-color .2s;
}
.nav-links a:hover, .nav-links a.active {
  opacity: 1;
  border-bottom-color: var(--feather-chartreuse);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--feather-cream);
  font-size: 26px;
  cursor: pointer;
}

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--court-green);
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 20px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
}

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--feather-chartreuse);
  color: var(--court-green);
}
.btn-primary:hover { box-shadow: 0 6px 18px rgba(199, 217, 74, 0.45); }
.btn-outline {
  background: transparent;
  border-color: currentColor;
  color: var(--court-green);
}
.btn-outline.on-dark { color: var(--feather-cream); }
.btn-outline:hover { background: rgba(20,51,44,0.06); }
.btn-outline.on-dark:hover { background: rgba(251,248,241,0.1); }
.btn-danger { background: var(--match-red); color: #fff; }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: box-shadow .2s ease, transform .2s ease;
  overflow: hidden;
}
.card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }

.event-card { display: flex; flex-direction: column; height: 100%; }
.event-card__cover {
  height: 150px;
  background: linear-gradient(135deg, var(--court-green), var(--court-green-light));
  position: relative;
}
.event-card__cover img { width: 100%; height: 100%; object-fit: cover; }
.event-card__body { padding: 18px 20px 22px; flex: 1; display: flex; flex-direction: column; }
.event-card__meta { font-size: 13px; color: var(--neutral-grey); margin-bottom: 6px; }
.event-card__title { font-size: 18px; margin-bottom: 10px; }
.event-card__foot { margin-top: auto; display: flex; justify-content: space-between; align-items: center; }

.badge {
  display: inline-block;
  font-family: var(--font-eyebrow);
  font-size: 11px;
  letter-spacing: 0.08em;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  text-transform: uppercase;
}
.badge-open { background: rgba(199,217,74,0.25); color: #4d5a13; }
.badge-ongoing { background: rgba(193,68,46,0.15); color: var(--match-red); }
.badge-closed { background: var(--neutral-grey-light); color: var(--neutral-grey); }
.badge-new { background: var(--match-red); color: #fff; margin-left: 8px; }

/* ---------- Hero ---------- */
.hero {
  background: var(--court-green);
  color: var(--feather-cream);
  position: relative;
  overflow: hidden;
  padding: 72px 0 96px;
}
.hero .container { position: relative; z-index: 2; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }

.hero-countdown {
  font-family: var(--font-eyebrow);
  font-size: clamp(56px, 9vw, 96px);
  font-weight: 700;
  line-height: 1;
  color: var(--feather-chartreuse);
}
.hero-countdown-label { font-size: 15px; color: var(--feather-cream); opacity: 0.75; margin-top: 6px; }

/* 球場線條背景紋理 */
.court-lines-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0.14;
  pointer-events: none;
}

/* 弧線分隔（羽球飛行軌跡）—— 全站識別元素 */
.arc-divider {
  width: 100%;
  height: 64px;
  display: block;
}
.arc-divider path { stroke: var(--neutral-grey-light); }
.arc-divider.on-dark path { stroke: rgba(251,248,241,0.25); }
.arc-milestone { fill: var(--feather-chartreuse); }
.arc-milestone-label {
  font-family: var(--font-eyebrow);
  font-size: 11px;
  fill: var(--neutral-grey);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- 區塊 ---------- */
.section { padding: 64px 0; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

/* ---------- 分頁 Tabs ---------- */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--neutral-grey-light); margin-bottom: 28px; flex-wrap: wrap; }
.tab-btn {
  background: none; border: none; cursor: pointer;
  font-family: var(--font-display); font-weight: 700; font-size: 15px;
  padding: 12px 20px; color: var(--neutral-grey);
  border-bottom: 3px solid transparent; margin-bottom: -2px;
}
.tab-btn.active { color: var(--court-green); border-bottom-color: var(--feather-chartreuse); }

/* ---------- 表單 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 620px) { .form-grid { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.field.full { grid-column: 1 / -1; }
label { font-size: 14px; font-weight: 700; color: var(--court-green); }
label .req { color: var(--match-red); }
input, select, textarea {
  font-family: var(--font-display);
  font-size: 15px;
  padding: 12px 14px;
  border: 1.5px solid var(--neutral-grey-light);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--line-charcoal);
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--feather-chartreuse);
  box-shadow: 0 0 0 3px rgba(199,217,74,0.35);
}
.hint { font-size: 13px; color: var(--neutral-grey); }
.form-error {
  background: rgba(193,68,46,0.08);
  color: var(--match-red);
  border: 1px solid rgba(193,68,46,0.3);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 14px;
  display: none;
}
.form-error.show { display: block; }
.form-success {
  background: rgba(199,217,74,0.15);
  border: 1px solid var(--feather-chartreuse);
  padding: 20px;
  border-radius: var(--radius-md);
  display: none;
}
.form-success.show { display: block; }
.odid-display {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--court-green);
  letter-spacing: 0.08em;
  padding: 10px 0;
}

/* ---------- 表格 ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--neutral-grey-light); }
th { font-family: var(--font-eyebrow); text-transform: uppercase; font-size: 12px; letter-spacing: 0.06em; color: var(--neutral-grey); }

/* ---------- 提示卡：防詐騙 / 客服 ---------- */
.alert-box {
  background: #fff;
  border-left: 4px solid var(--match-red);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
}
.alert-box.info { border-left-color: var(--feather-chartreuse); }

/* ---------- 頁尾 ---------- */
.site-footer {
  background: var(--court-green);
  color: rgba(251,248,241,0.75);
  padding: 48px 0 28px;
  margin-top: 64px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h4 { color: var(--feather-cream); font-size: 14px; font-family: var(--font-eyebrow); letter-spacing: 0.08em; text-transform: uppercase; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 8px; }
.footer-grid a:hover { color: var(--feather-chartreuse); }
.footer-bottom { border-top: 1px solid rgba(251,248,241,0.15); padding-top: 20px; font-size: 13px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------- 工具 ---------- */
.loading { color: var(--neutral-grey); font-size: 14px; padding: 24px 0; text-align: center; }
.empty-state { text-align: center; padding: 48px 20px; color: var(--neutral-grey); }
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--feather-chartreuse); color: var(--court-green);
  padding: 10px 16px; z-index: 200;
}
.skip-link:focus { left: 16px; top: 16px; }
:focus-visible { outline: 3px solid var(--feather-chartreuse); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}