/*
 * EPP 開發區樣式說明
 * 檔案：public/assets/css/site.css
 * 職責：公開入口、登入頁與共用網站元件的基礎樣式。
 * 邊界：只處理公開頁面的呈現，不承擔會員驗證、遊戲狀態或 API 邏輯。
 */

:root {
  --epp-background-primary: #080d18;
  --epp-background-secondary: #101a2b;
  --epp-surface-primary: #151d2e;
  --epp-surface-elevated: #202a3d;
  --epp-border-primary: #41516a;
  --epp-border-highlight: #f1c86a;
  --epp-text-primary: #f5f2e8;
  --epp-text-secondary: #c9d5df;
  --epp-text-muted: #8fa2b5;
  --epp-accent-gold: #f1c86a;
  --epp-accent-ember: #e67845;
  --epp-accent-blue: #65c9d7;
  --epp-success: #69d39a;
  --epp-warning: #f1c86a;
  --epp-danger: #ff6b75;
  --epp-focus: #fff2a6;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { background: var(--epp-background-primary); }
body.epp-page {
  margin: 0;
  min-height: 100vh;
  background: var(--epp-background-primary);
  color: var(--epp-text-primary);
  font-family: Inter, ui-sans-serif, system-ui, "Noto Sans TC", sans-serif;
  line-height: 1.65;
}

.epp-home-backdrop {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(4, 8, 17, .22) 0%, rgba(4, 8, 17, .72) 58%, #080d18 96%),
    radial-gradient(circle at 50% 22%, transparent 0 18%, rgba(5, 9, 19, .45) 64%),
    url("../images/epp-home-twilight-v1.webp") center / cover no-repeat;
  filter: saturate(.88);
}

.epp-container { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; padding: 28px 20px 36px; }
.epp-home-shell { display: flex; min-height: 100vh; flex-direction: column; justify-content: center; }
.epp-narrow { max-width: 440px; }
.epp-header { text-align: center; margin-bottom: 18px; }
.epp-brand-logo { display: block; width: min(620px, 92%); max-height: 180px; margin: 0 auto; filter: drop-shadow(0 8px 18px rgba(2, 6, 14, .7)); }
.epp-title { margin: 0; color: var(--epp-accent-gold); font-size: clamp(2.6rem, 10vw, 4.6rem); letter-spacing: .18em; }
.epp-subtitle { margin: 2px 0 0; color: var(--epp-text-secondary); font-size: 1.1rem; }
.epp-subtitle-zh { margin: -8px 0 0; color: var(--epp-text-secondary); letter-spacing: .18em; }
.epp-hero-kicker { margin: 8px 0 0; color: var(--epp-accent-gold); font-size: .92rem; letter-spacing: .08em; }

.epp-notice {
  position: relative;
  overflow: hidden;
  padding: 16px 20px;
  border: 1px solid color-mix(in srgb, var(--epp-accent-blue) 50%, transparent);
  border-left: 4px solid var(--epp-accent-gold);
  border-radius: 12px;
  background: color-mix(in srgb, var(--epp-background-secondary) 88%, transparent);
  box-shadow: 0 18px 55px rgba(0, 0, 0, .28);
  backdrop-filter: blur(12px);
  font-size: .9rem;
}
.epp-notice::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(115deg, rgba(101, 201, 215, .07), transparent 45%); }
.epp-notice-heading { display: flex; align-items: center; gap: 12px; }
.epp-notice-heading > span { display: grid; flex: 0 0 32px; height: 32px; place-items: center; border: 1px solid var(--epp-accent-gold); border-radius: 50%; color: var(--epp-accent-gold); font: 700 1rem Georgia, serif; }
.epp-notice h2 { margin: 0; color: var(--epp-accent-gold); font-size: 1.02rem; letter-spacing: .05em; }
.epp-notice p { position: relative; z-index: 1; margin: 6px 0; color: var(--epp-text-secondary); }
.epp-notice strong { color: var(--epp-text-primary); }
.epp-notice details { position: relative; z-index: 1; margin-top: 8px; }
.epp-notice summary { width: fit-content; cursor: pointer; color: var(--epp-accent-blue); }

.epp-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
.epp-primary-actions, .epp-secondary-actions { display: grid; gap: 10px; }
.epp-primary-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.epp-secondary-actions { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.epp-btn {
  display: flex;
  min-height: 48px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  padding: 10px 16px;
  border: 1px solid var(--epp-border-primary);
  border-radius: 9px;
  background: color-mix(in srgb, var(--epp-surface-primary) 92%, transparent);
  color: var(--epp-text-primary);
  box-shadow: inset 0 1px rgba(255,255,255,.04), 0 8px 24px rgba(0,0,0,.18);
  font: inherit;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: transform .16s ease, border-color .16s ease, background .16s ease;
}
.epp-btn:hover { transform: translateY(-2px); border-color: var(--epp-border-highlight); background: var(--epp-surface-elevated); }
.epp-btn:focus-visible, summary:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid var(--epp-focus); outline-offset: 3px; }
.epp-btn small { color: var(--epp-text-muted); font-size: .74rem; }
.epp-btn-primary { border-color: #ffdc83; background: linear-gradient(135deg, var(--epp-accent-gold), var(--epp-accent-ember)); color: #17130d; font-weight: 750; }
.epp-btn-primary small { color: #3f2b1d; }
.epp-btn-danger { border-color: var(--epp-danger); color: var(--epp-danger); }
.epp-btn-plain { background: color-mix(in srgb, var(--epp-background-primary) 58%, transparent); box-shadow: none; }
.epp-checkbox { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; }
.epp-checkbox input { width: 22px; height: 22px; accent-color: var(--epp-accent-gold); }
.epp-notice-form, .epp-login form { display: flex; flex-direction: column; }

.epp-field { display: block; margin-bottom: 14px; }
.epp-field input, .epp-dialog-modal textarea {
  display: block; width: 100%; margin-top: 4px; padding: 11px; border: 1px solid var(--epp-border-primary); border-radius: 7px;
  background: var(--epp-background-primary); color: var(--epp-text-primary); font: inherit;
}
.epp-error { padding: 9px 12px; border: 1px solid var(--epp-danger); border-radius: 7px; background: color-mix(in srgb, var(--epp-danger) 14%, transparent); }
.epp-hint { text-align: center; }
.epp-hint a { color: var(--epp-accent-gold); }

.epp-dialog-modal { width: min(92vw, 560px); border: 1px solid var(--epp-border-highlight); border-radius: 14px; background: var(--epp-surface-primary); color: var(--epp-text-primary); box-shadow: 0 24px 90px #000; }
.epp-dialog-modal::backdrop { background: rgba(3, 6, 13, .82); backdrop-filter: blur(6px); }
.epp-dialog-modal h2 { margin-top: 0; color: var(--epp-accent-gold); }
.epp-dialog-modal textarea { min-height: 140px; resize: vertical; }
.epp-modal-close { float: right; border: 0; background: none; color: var(--epp-text-secondary); font-size: 1.7rem; cursor: pointer; }
.epp-modal-actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.epp-setting-row { display: flex; min-height: 48px; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--epp-border-primary); }
.epp-setting-row input { width: 22px; height: 22px; accent-color: var(--epp-accent-blue); }
.epp-modal-hint { color: var(--epp-text-muted); font-size: .84rem; }

.epp-footer { margin-top: 18px; color: var(--epp-text-muted); font-size: .76rem; text-align: center; }
.epp-footer p { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; margin: 0; }

body.epp-game-page { margin: 0; overflow: hidden; background: #050811; color: var(--epp-text-primary); font-family: Inter, ui-sans-serif, system-ui, "Noto Sans TC", sans-serif; }
.epp-game-nav { position: fixed; top: max(8px, env(safe-area-inset-top)); right: max(10px, env(safe-area-inset-right)); z-index: 50; display: flex; gap: 12px; }
.epp-game-nav a { padding: 4px 8px; border-radius: 5px; background: rgba(8,13,24,.64); color: var(--epp-text-muted); font-size: .78rem; text-decoration: none; }
.epp-game-nav a:hover { color: var(--epp-accent-gold); }

[data-epp-theme="high-contrast"] .epp-home-backdrop { filter: saturate(.35) contrast(1.25); }
[data-epp-theme="reduced-glare"] .epp-home-backdrop { filter: saturate(.55) brightness(.72); }
.epp-low-performance .epp-home-backdrop { background-attachment: initial; }
.epp-reduce-motion *, .epp-reduce-motion *::before, .epp-reduce-motion *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }

@media (max-width: 620px) {
  .epp-home-backdrop { background-position: 52% center; }
  .epp-container { padding: 14px 12px 24px; }
  .epp-home-shell { justify-content: flex-start; }
  .epp-brand-logo { width: min(420px, 94%); max-height: 124px; }
  .epp-subtitle-zh { margin-top: -3px; font-size: .88rem; }
  .epp-hero-kicker { margin-top: 4px; font-size: .76rem; }
  .epp-header { margin-bottom: 10px; }
  .epp-notice { padding: 12px 13px; font-size: .82rem; }
  .epp-notice-heading > span { flex-basis: 28px; height: 28px; }
  .epp-primary-actions { grid-template-columns: 1fr; }
  .epp-secondary-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .epp-secondary-actions .epp-btn:last-child { grid-column: 1 / -1; }
  .epp-btn { min-height: 46px; padding: 8px 10px; font-size: .9rem; }
  .epp-footer { margin-top: 12px; }
  .epp-modal-actions { grid-template-columns: 1fr; }
}

@media (max-height: 700px) and (min-width: 700px) {
  .epp-brand-logo { max-height: 125px; }
  .epp-container { padding-block: 10px; }
  .epp-notice { padding-block: 10px; }
  .epp-notice > p { margin-block: 3px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}