/* KIMCHI MART REWARDS — global modern grocery loyalty
   Mobile-first, max 480px center column on desktop.
   English-first UI, Inter font (with Pretendard fallback for Korean). */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
  /* KIMCHI brand */
  --km-green: #1a5c3a;
  --km-green-d: #0f3d24;
  --km-green-l: #dcfce7;
  --km-red: #c1272d;
  --km-red-d: #8b1a1f;

  /* Neutral surface */
  --bg: #fafaf7;
  --surface: #ffffff;
  --surface-2: #f5f4ee;
  --border: #e6e4dc;

  /* Text */
  --text: #1a1a1a;
  --text-2: #525252;
  --text-3: #8a8a85;
  --text-on-dark: #ffffff;

  /* Tier colors */
  --tier-bronze: #b08754;
  --tier-silver: #94a3b8;
  --tier-gold: #d4a017;
  --tier-diamond: #6366f1;

  /* Accent */
  --accent-warm: #fbbf24;
  --danger: #dc2626;

  /* Layout */
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 28px rgba(0,0,0,.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  font-family: 'Inter', 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-feature-settings: 'cv11','ss01','ss03';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -.011em;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  font-size: 16px;
  line-height: 1.45;
}

/* App shell — phone-sized centered column on desktop */
.app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--bg);
  position: relative;
  padding-bottom: 80px; /* tab bar */
  display: flex;
  flex-direction: column;
}

/* ====== Header ====== */
.app-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.app-header .brand {
  display: flex; align-items: center; gap: 6px;
  font-weight: 900; font-size: 1.05em;
  letter-spacing: -.02em;
  text-decoration: none;
  color: var(--text);
}
.app-header .brand .km-logo {
  height: 36px; width: auto; display: block;
  object-fit: contain;
}
/* Legacy fallbacks — still used by older cached HTML referring to .km-k / .km-name */
.app-header .brand .km-k {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 7px;
  background: var(--km-red); color: #fff;
  font-weight: 900; font-size: .9em;
  box-shadow: 0 1px 3px rgba(193,39,45,.3);
}
.app-header .brand .km-name { color: var(--km-green); }
.app-header .icon-btn {
  background: transparent; border: 0; cursor: pointer;
  width: 38px; height: 38px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2em; color: var(--text-2);
  transition: background .15s;
}
.app-header .icon-btn:hover { background: var(--surface-2); }
.app-header .icon-btn.danger:hover { color: var(--danger); }

/* ====== Lang switcher ====== */
.lang-bar {
  display: inline-flex; gap: 2px;
  background: var(--surface-2);
  border-radius: 18px;
  padding: 3px;
}
.lang-bar button {
  background: transparent; border: 0; cursor: pointer;
  padding: 5px 9px; border-radius: 14px;
  font-family: inherit; font-weight: 700; font-size: .72em;
  color: var(--text-2); letter-spacing: .02em;
  min-width: 30px;
  transition: all .15s;
}
.lang-bar button.active { background: var(--km-green); color: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.15); }

/* ====== Main content ====== */
.app-main { flex: 1; padding: 14px 16px 24px; display: flex; flex-direction: column; gap: 14px; }

/* ====== Cards ====== */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 18px;
  box-shadow: var(--shadow-sm);
}
.card.hero {
  background: linear-gradient(135deg, var(--km-green) 0%, var(--km-green-d) 100%);
  color: var(--text-on-dark);
  border: 0;
  box-shadow: var(--shadow);
  padding: 22px 20px;
}
.card.hero .label { font-size: .72em; opacity: .8; text-transform: uppercase; letter-spacing: .12em; font-weight: 700; }
.card.hero .points { font-size: 2.6em; font-weight: 900; letter-spacing: -.03em; margin: 4px 0; }
.card.hero .points-unit { font-size: .42em; font-weight: 700; opacity: .85; vertical-align: middle; margin-left: 6px; }
.card.hero .sub { opacity: .85; font-size: .88em; }

/* Barcode card — most-used visual */
.barcode-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 22px 16px 18px;
  text-align: center;
  box-shadow: var(--shadow);
}
.barcode-card .barcode-label {
  font-size: .76em; color: var(--text-3);
  text-transform: uppercase; letter-spacing: .14em;
  font-weight: 700; margin-bottom: 8px;
}
.barcode-card svg { display: block; margin: 6px auto 4px; max-width: 100%; height: auto; }
.barcode-card .phone-display {
  font-family: 'SFMono-Regular', Menlo, Consolas, monospace;
  font-size: .92em; color: var(--text-2);
  margin-top: 4px; letter-spacing: .04em;
}
.barcode-card .scan-hint {
  font-size: .82em; color: var(--text-3);
  margin-top: 10px;
}

/* Tier card */
.tier-card { padding: 16px 18px; }
.tier-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.tier-badge {
  width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4em;
  background: var(--surface-2);
}
.tier-badge.bronze { background: linear-gradient(135deg, #d4a574, var(--tier-bronze)); }
.tier-badge.silver { background: linear-gradient(135deg, #cbd5e1, var(--tier-silver)); }
.tier-badge.gold { background: linear-gradient(135deg, #fde68a, var(--tier-gold)); }
.tier-badge.diamond { background: linear-gradient(135deg, #c7d2fe, var(--tier-diamond)); }
.tier-info { flex: 1; min-width: 0; }
.tier-info .name { font-weight: 800; font-size: 1.05em; }
.tier-info .next { font-size: .82em; color: var(--text-3); margin-top: 2px; }
.tier-progress {
  height: 8px; background: var(--surface-2);
  border-radius: 99px; overflow: hidden;
}
.tier-progress .fill {
  height: 100%; background: linear-gradient(90deg, var(--km-green), var(--km-green-d));
  border-radius: 99px;
  transition: width .6s cubic-bezier(.2,.8,.2,1);
}

/* Quick actions grid */
.quick-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
}
.quick-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 12px;
  cursor: pointer;
  transition: all .15s;
  display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
  text-decoration: none; color: var(--text);
  font-family: inherit;
  text-align: left;
  font-size: 1em;
}
.quick-btn:hover { border-color: var(--km-green); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.quick-btn .ic {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--km-green-l); color: var(--km-green);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.15em;
}
.quick-btn .lbl { font-weight: 700; font-size: .92em; }
.quick-btn .desc { font-size: .76em; color: var(--text-3); line-height: 1.35; }

/* Section heading */
.sec-title {
  font-weight: 800; font-size: .82em;
  color: var(--text-3); text-transform: uppercase;
  letter-spacing: .12em;
  margin: 6px 4px -2px;
}

/* Notification card */
.notice {
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex; align-items: center; gap: 12px;
  border: 1px solid #fcd34d;
}
.notice .ic { font-size: 1.4em; }
.notice .text { flex: 1; }
.notice .text .ti { font-weight: 800; font-size: .92em; color: #78350f; }
.notice .text .sub { font-size: .8em; color: #92400e; margin-top: 1px; }

/* Bottom tab bar */
.tabbar {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 480px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  padding: 6px 0 calc(6px + env(safe-area-inset-bottom, 0));
  z-index: 100;
}
.tabbar a {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 8px 4px;
  text-decoration: none;
  color: var(--text-3);
  font-size: .68em; font-weight: 700;
  letter-spacing: .02em;
  transition: color .15s;
}
.tabbar a .ic { font-size: 1.35em; }
.tabbar a.active { color: var(--km-green); }
.tabbar a:hover { color: var(--km-green); }

/* ====== Forms (login etc) ====== */
.form-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.form-title {
  font-size: 1.4em; font-weight: 900;
  letter-spacing: -.02em;
  margin-bottom: 4px;
}
.form-sub {
  color: var(--text-2); font-size: .92em;
  margin-bottom: 20px;
}
.field { margin-bottom: 14px; }
.field label {
  display: block; font-size: .82em; font-weight: 700;
  color: var(--text-2); margin-bottom: 6px;
  letter-spacing: -.005em;
}
.field input, .field select {
  width: 100%;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: .98em;
  background: var(--surface);
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
.field input:focus, .field select:focus {
  border-color: var(--km-green);
  box-shadow: 0 0 0 3px rgba(26,92,58,.12);
}
.field .hint { font-size: .76em; color: var(--text-3); margin-top: 4px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%;
  background: var(--km-green); color: #fff;
  border: 0; border-radius: 12px;
  padding: 14px 18px;
  font-family: inherit;
  font-weight: 800; font-size: 1em;
  cursor: pointer;
  transition: all .15s;
  box-shadow: 0 2px 8px rgba(26,92,58,.25);
  letter-spacing: .01em;
}
.btn:hover { background: var(--km-green-d); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(26,92,58,.35); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn.ghost { background: transparent; color: var(--km-green); box-shadow: none; border: 1.5px solid var(--border); }
.btn.ghost:hover { background: var(--surface-2); }

.toggle-row {
  display: flex; gap: 0;
  background: var(--surface-2);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 18px;
}
.toggle-row button {
  flex: 1;
  background: transparent; border: 0;
  padding: 10px;
  font-family: inherit; font-weight: 700; font-size: .92em;
  color: var(--text-3); cursor: pointer;
  border-radius: 9px;
  transition: all .15s;
}
.toggle-row button.active {
  background: var(--surface); color: var(--km-green);
  box-shadow: var(--shadow-sm);
}

.alert {
  padding: 10px 14px;
  border-radius: 10px;
  font-size: .88em;
  margin-bottom: 14px;
}
.alert.error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert.success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }

/* Splash / centered */
.splash {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 24px;
  text-align: center;
}
.splash .logo {
  width: 86px; height: 86px; border-radius: 22px;
  background: var(--km-red); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 3em; font-weight: 900;
  box-shadow: 0 6px 24px rgba(193,39,45,.35);
  margin-bottom: 18px;
}
.splash h1 {
  font-weight: 900; letter-spacing: -.03em;
  font-size: 1.8em;
}
.splash h1 .green { color: var(--km-green); }
.splash p { color: var(--text-2); margin: 8px 0 22px; }

/* Empty state */
.empty {
  text-align: center; padding: 40px 20px;
  color: var(--text-3);
}
.empty .ic { font-size: 3em; opacity: .3; margin-bottom: 8px; }

/* Print barcode larger on tap */
@media (max-width: 380px) {
  .card.hero .points { font-size: 2.2em; }
  .quick-btn { padding: 14px 10px; }
}