/* =================================================================
   allAbut — 공통 기본 + 랜딩·로그인 화면 (다크) + 세션 팝업
   글자 크기는 rem 단위 → 글자 크기 버튼(A / A+ / A++)이 화면 전체에 적용돼요
   ================================================================= */

:root {
  /* 색 */
  --navy: #001D4A;
  --gold: #D4AF37;
  --gold-dark: #8A6D12;       /* 밝은 배경 위 골드 글씨 (대비 확보용) */
  --dark: #06090f;
  --bg: #F7F8FA;
  --card: #FFFFFF;
  --text: #001D4A;
  --muted: #4B5563;           /* 보조 글씨 (#6B7280 보다 조금 진하게: 읽기 쉽게) */
  --muted-light: #6B7280;
  --border: #E5E7EB;
  --border-strong: #CBD2DC;
  --danger: #B42318;
  --danger-bg: #FEF3F2;
  --success: #067647;
  --success-bg: #ECFDF3;
  --warn-bg: #FFF8DB;
  --warn-border: #F5D565;
  --focus: #2563EB;

  /* 글꼴 */
  --font-sans: 'IBM Plex Sans', 'IBM Plex Sans Thai', 'IBM Plex Sans Arabic', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(0, 29, 74, 0.06), 0 4px 16px rgba(0, 29, 74, 0.05);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 100%; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;            /* 16px */
  line-height: 1.55;
  background: var(--dark);
  color: #fff;
  min-height: 100vh;
}
body.in-app { background: var(--bg); color: var(--text); }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }

.mono { font-family: var(--font-mono); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* 키보드로 움직일 때 잘 보이는 테두리 */
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }


/* ===== 화면(screen) 공통: 한 번에 하나만 보이고, 페이드로 전환 ===== */
.screen {
  display: none;
  min-height: 100vh;
  opacity: 0;
  transition: opacity 0.4s ease;
}
.screen.active  { display: flex; }
.screen.visible { opacity: 1; }

.screen-dark {
  position: relative;
  background: var(--dark);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 72px 16px 120px;   /* 아래 푸터에 가리지 않게 */
}
#screen-auth {
  justify-content: flex-start;
  background:
    radial-gradient(circle at 50% 30%, rgba(212, 175, 55, 0.08), transparent 55%),
    var(--dark);
}


/* ===== 로고: all A but 5μm (B1 스타일) =====
   글자 크기는 모두 .logo 의 font-size(36px) 기준 비율(em) */
.logo {
  display: inline-flex;
  align-items: baseline;
  line-height: 1;
  font-size: 36px;
}
.logo-small { font-size: 22px; }
.logo-all,
.logo-but {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 1em;
  font-weight: 200;
  color: #fff;
}
.logo-a {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 1.3333em;
  font-weight: 600;
  color: var(--gold);
}
.logo-um {
  font-family: var(--font-mono);
  font-size: 0.3056em;
  color: var(--gold);
  letter-spacing: 0;
  margin-left: 1px;
  position: relative;
  top: -1.7273em;
}
/* 로고는 언어가 RTL 이어도 항상 왼쪽→오른쪽 */
.logo { direction: ltr; }

/* ===== 슬로건 ===== */
.slogan {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gold);
  letter-spacing: 4px;
  text-transform: uppercase;
  opacity: 0.8;
  margin-top: 18px;
}

/* ===== 랜딩 Start Order ===== */
.cta-btn {
  margin-top: 44px;
  min-height: 56px;
  padding: 0 48px;
  background: var(--gold);
  color: var(--navy);
  font-weight: 600;
  font-size: 1.125rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: filter 0.2s;
}
.cta-btn:hover { filter: brightness(1.12); }

/* ===== 랜딩·로그인 언어 선택 (오른쪽 위) ===== */
.public-lang {
  position: absolute;
  top: 16px;
  inset-inline-end: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #C9D1DE;
  font-size: 0.9375rem;
}
.public-lang select {
  min-height: 44px;
  padding: 0 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
}
.public-lang option { color: #001D4A; }


/* ===== 로그인 카드 (흰색) ===== */
.auth-card {
  width: 100%;
  max-width: 440px;
  margin-top: 28px;
  padding: 28px 28px 24px;
  background: #fff;
  color: var(--text);
  border-radius: 16px;
  border-top: 4px solid var(--gold);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  text-align: start;
}
.auth-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 22px;
}
.auth-tab {
  flex: 1;
  min-height: 52px;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  color: var(--muted);
  font-size: 1.0625rem;
  font-weight: 500;
  cursor: pointer;
}
.auth-tab.active { color: var(--navy); font-weight: 600; border-bottom-color: var(--gold); }

.auth-field { margin-bottom: 16px; }
.auth-field label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--navy);
}
.auth-optional { font-weight: 400; color: var(--muted); }
.auth-field input {
  width: 100%;
  min-height: 52px;
  padding: 0 14px;
  background: #fff;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 1.0625rem;
  color: var(--text);
}
.auth-field input:focus { border-color: var(--navy); outline: none; box-shadow: 0 0 0 3px rgba(0, 29, 74, 0.12); }

.auth-submit {
  width: 100%;
  min-height: 56px;
  margin-top: 6px;
  background: var(--navy);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
}
.auth-submit:hover { background: #062B66; }
.auth-submit:disabled { opacity: 0.6; cursor: default; }

.auth-msg { font-size: 0.9375rem; line-height: 1.5; min-height: 22px; margin: 4px 0 8px; }
.auth-msg.error { color: var(--danger); font-weight: 500; }
.auth-msg.info { color: var(--success); font-weight: 500; }

/* ← Back */
.back-link {
  margin-top: 22px;
  min-height: 48px;
  padding: 0 18px;
  background: none;
  border: none;
  color: #C9D1DE;
  font-size: 1rem;
  cursor: pointer;
}
.back-link:hover { color: var(--gold); }


/* ===== 5분 경고 팝업 ===== */
.session-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(3, 5, 10, 0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.session-modal.open { opacity: 1; pointer-events: auto; }
.session-card {
  width: 100%;
  max-width: 400px;
  padding: 28px 24px 24px;
  background: #fff;
  color: var(--text);
  border-radius: 16px;
  border-top: 4px solid var(--danger);
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}
.session-modal-title { font-size: 1.375rem; font-weight: 600; }
.session-modal-text { margin-top: 6px; color: var(--muted); }
.session-modal-countdown {
  margin: 16px 0 22px;
  font-size: 2.75rem;
  font-weight: 500;
  color: var(--danger);
  letter-spacing: 2px;
}
.session-modal-actions { display: flex; flex-direction: column; gap: 10px; }


/* ===== 랜딩 안내 문구 (Session expired...) ===== */
.landing-notice {
  position: fixed;
  top: 24px;
  left: 50%;
  z-index: 250;
  transform: translate(-50%, -10px);
  max-width: calc(100% - 32px);
  padding: 14px 22px;
  background: #fff;
  border-inline-start: 4px solid var(--gold);
  border-radius: 10px;
  color: var(--navy);
  font-size: 1rem;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
}
.landing-notice.show { opacity: 1; transform: translate(-50%, 0); }


/* ===== 하단 푸터 (랜딩·로그인 화면): Terms · Privacy · Credit & Refund Policy · © ===== */
.public-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 20;
  padding: 10px 16px 14px;
  text-align: center;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
  background: linear-gradient(transparent, rgba(6, 9, 15, 0.9) 40%);
}
.public-footer a { color: rgba(255, 255, 255, 0.78); text-decoration: none; padding: 6px 4px; display: inline-block; }
.public-footer a:hover { color: var(--gold); text-decoration: underline; }
body.in-app .public-footer { display: none; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 2px 8px; }
.footer-copy { margin-top: 2px; }

/* 가입 동의 체크 */
.auth-agree { display: flex; align-items: flex-start; gap: 10px; margin: 4px 0 8px; font-size: 0.9375rem; line-height: 1.5; color: var(--text); cursor: pointer; }
.auth-agree input { width: 22px; height: 22px; margin-top: 1px; flex: 0 0 auto; accent-color: var(--navy); }
.auth-agree a { color: var(--navy); font-weight: 600; }