/* ═══════════════════════════════════════════════════════════════════════════
   VM Loyalty PWA – Mobile-first stylesheet
   Palette: navy (#1a1a2e) / indigo (#16213e) / accent (#e94560)
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Design tokens ─────────────────────────────────────────────────────── */
:root {
  --color-bg:          #0f0f1a;
  --color-surface:     #1a1a2e;
  --color-surface-2:   #16213e;
  --color-accent:      #e94560;
  --color-accent-dark: #c73652;
  --color-text:        #e8eaf0;
  --color-muted:       #8892a4;
  --color-border:      rgba(255,255,255,0.08);
  --color-success:     #2ecc71;
  --color-warning:     #f39c12;
  --color-danger:      #e74c3c;
  --color-points:      #ffd700;

  --radius:    14px;
  --radius-sm:  8px;
  --shadow:    0 4px 24px rgba(0,0,0,0.45);
  --transition: 0.2s ease;

  --safe-top:    env(safe-area-inset-top,    0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* ── Reset / Base ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  padding-bottom: calc(80px + var(--safe-bottom));
}

/* ── Header ────────────────────────────────────────────────────────────── */
.app-header {
  background: var(--color-surface);
  padding: calc(var(--safe-top) + 14px) 20px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text);
}

.brand-icon {
  height: 32px;
  width: auto;
  display: block;
}

.header-sub {
  font-size: 0.75rem;
  color: var(--color-muted);
  font-style: italic;
}

/* ── Customer Card ─────────────────────────────────────────────────────── */
.customer-card {
  margin: 16px;
  padding: 24px 20px 20px;
  background: linear-gradient(135deg, var(--color-surface-2) 0%, #0d1b2a 100%);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.customer-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  border: 2px solid transparent;
  background: linear-gradient(135deg, var(--tier-color, var(--color-accent)), transparent) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  opacity: 0.6;
}

.customer-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.customer-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
}

.customer-company {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 2px;
}

.tier-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.points-display {
  text-align: center;
  margin: 16px 0;
}

.points-value {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-points);
  line-height: 1;
  letter-spacing: -1px;
  text-shadow: 0 0 30px rgba(255,215,0,0.3);
}

.points-label {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.customer-card__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.customer-card__spend {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.stat {
  text-align: center;
}

.stat-val {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
}

.stat-lbl {
  font-size: 0.65rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 2px;
}

/* ── QR Section ────────────────────────────────────────────────────────── */
.qr-section {
  margin: 0 16px 16px;
}

.btn-show-qr {
  width: 100%;
  padding: 16px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background var(--transition), transform var(--transition);
  box-shadow: 0 4px 16px rgba(233,69,96,0.4);
}

.btn-show-qr:active {
  background: var(--color-accent-dark);
  transform: scale(0.98);
}

/* ── QR Overlay ────────────────────────────────────────────────────────── */
.qr-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  backdrop-filter: blur(6px);
}

.qr-modal {
  background: var(--color-surface);
  border-radius: var(--radius);
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.qr-modal__header {
  background: var(--color-surface-2);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.95rem;
}

.qr-close {
  background: none;
  border: none;
  color: var(--color-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color var(--transition);
}

.qr-close:hover { color: var(--color-text); }

.qr-modal__body {
  padding: 20px;
}

.qr-frame {
  width: 100%;
  aspect-ratio: 1;
  background: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 16px;
  position: relative;
}

.qr-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.qr-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: #333;
}

.qr-loading p { margin: 0; font-size: 0.85rem; }

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid #ddd;
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Countdown ──────────────────────────────────────────────────────────── */
.qr-countdown {
  text-align: center;
  margin-bottom: 12px;
}

.countdown-label {
  font-size: 0.75rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.countdown-timer {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-success);
  line-height: 1;
  transition: color 0.5s;
}

.countdown-timer.warn  { color: var(--color-warning); }
.countdown-timer.danger{ color: var(--color-danger);  }

.countdown-bar-wrap {
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  margin-top: 6px;
  overflow: hidden;
}

.countdown-bar {
  height: 100%;
  background: var(--color-success);
  border-radius: 3px;
  width: 100%;
  transition: width 1s linear, background 0.5s;
}

.countdown-bar.warn   { background: var(--color-warning); }
.countdown-bar.danger { background: var(--color-danger);  }

/* ── QR expired / refresh ───────────────────────────────────────────────── */
.qr-warn {
  text-align: center;
  color: var(--color-warning);
  font-size: 0.9rem;
  padding: 8px;
  margin-bottom: 8px;
}

.btn-refresh-qr {
  flex: 1;
  padding: 12px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background var(--transition);
}

.btn-refresh-qr:hover { background: rgba(255,255,255,0.08); }

.btn-share-qr {
  flex: 1;
  padding: 12px;
  background: var(--color-success);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: opacity var(--transition);
}

.btn-share-qr:hover { opacity: 0.88; }

.qr-actions {
  display: flex;
  gap: 8px;
  width: 100%;
}

/* ── Transactions ───────────────────────────────────────────────────────── */
.tx-section {
  margin: 0 16px 16px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.section-title {
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
}

.section-count {
  font-size: 0.75rem;
  background: var(--color-surface-2);
  border-radius: 12px;
  padding: 2px 10px;
  color: var(--color-muted);
}

.tx-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tx-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px;
  cursor: pointer;
  transition: border-color var(--transition);
}

.tx-item:active,
.tx-item:hover { border-color: rgba(255,255,255,0.18); }

.tx-item__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tx-item__sub {
  margin-top: 6px;
  flex-wrap: wrap;
  gap: 6px;
}

.tx-date   { font-size: 0.85rem; color: var(--color-muted); }
.tx-amount { font-size: 1rem; font-weight: 700; color: var(--color-text); }

.tx-discount {
  font-size: 0.8rem;
  color: var(--color-success);
  display: flex;
  align-items: center;
  gap: 4px;
}

.tx-points {
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 4px;
}

.tx-points.earned   { color: var(--color-points); }
.tx-points.redeemed { color: var(--color-muted);  }

.tx-detail {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}

.tx-items-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.82rem;
  color: var(--color-muted);
}

.tx-items-list li {
  display: flex;
  gap: 8px;
  padding: 3px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.item-name { flex: 1; }
.item-qty  { white-space: nowrap; }
.item-val  { white-space: nowrap; color: var(--color-text); }

.tx-note {
  font-size: 0.78rem;
  color: var(--color-muted);
  margin: 8px 0 0;
  font-style: italic;
}

.tx-no-items { font-size: 0.82rem; color: var(--color-muted); margin: 0; }

.tx-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.tx-empty i { font-size: 2.5rem; display: block; margin-bottom: 10px; }

.btn-load-more {
  width: 100%;
  padding: 13px;
  background: transparent;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
  transition: border-color var(--transition), color var(--transition);
}

.btn-load-more:hover {
  border-color: rgba(255,255,255,0.25);
  color: var(--color-text);
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
.app-footer {
  text-align: center;
  padding: 20px 16px;
  font-size: 0.75rem;
  color: var(--color-muted);
}

.footer-id { opacity: 0.45; font-family: monospace; }

.btn-logout {
  margin-top: 10px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-size: 0.78rem;
  padding: 5px 14px;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}
.btn-logout:hover { color: var(--color-text); border-color: rgba(255,255,255,0.2); }

/* ── Login Screen ───────────────────────────────────────────────────────── */
#screen-login {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 34px 18px 30px;
  text-align: center;
  box-shadow: var(--shadow);
}

.login-icon {
  font-size: 3rem;
  color: var(--color-points);
  margin-bottom: 16px;
  line-height: 1;
}

.login-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--color-text);
}

.login-desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin: 0 0 28px;
}

#login-form {
  --vm-code-gap: 10px;
  width: 100%;
}

.identifier-input {
  display: block;
  width: 100%;
  padding: 12px 14px;
  background: var(--color-surface-2);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 1rem;
  margin-bottom: 16px;
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
  appearance: none;
  box-sizing: border-box;
}
.identifier-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(233,69,96,0.2);
}
.identifier-input::placeholder { color: rgba(255,255,255,0.3); }

.code-inputs {
  display: flex;
  align-items: stretch;
  width: 100%;
  box-sizing: border-box;
  gap: var(--vm-code-gap);
  margin-bottom: 16px;
}

.code-input {
  flex: none;
  width: calc((100% - var(--vm-code-gap)) / 2);
  max-width: calc((100% - var(--vm-code-gap)) / 2);
  min-width: 0;
  min-height: 3.35rem;
  padding: 14px 10px;
  background: var(--color-surface-2);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: clamp(1.14rem, 4.8vw, 1.4rem);
  font-family: "Courier New", monospace;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  font-weight: 700;
  text-align: center;
  line-height: 1.1;
  letter-spacing: 0.02em;
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
  appearance: none;
  box-sizing: border-box;
}

.code-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(233,69,96,0.2);
}

.code-input::placeholder { color: rgba(255,255,255,0.15); }

@media (max-width: 380px) {
  .login-card {
    padding: 30px 14px 26px;
  }

  .code-input {
    font-size: 1.05rem;
    letter-spacing: 0.015em;
    padding: 12px 7px;
  }
}

@media (max-width: 340px) {
  .login-card {
    padding: 28px 12px 24px;
  }

  .code-inputs {
    --vm-code-gap: 8px;
  }

  .code-input {
    min-height: 3.1rem;
    font-size: 1rem;
    letter-spacing: 0.01em;
    padding: 11px 6px;
  }
}

.login-error {
  background: rgba(231,76,60,0.12);
  border: 1px solid rgba(231,76,60,0.35);
  border-radius: var(--radius-sm);
  color: #ff6b6b;
  font-size: 0.85rem;
  padding: 10px 14px;
  margin-bottom: 16px;
  text-align: left;
}

.btn-login {
  width: 100%;
  padding: 15px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background var(--transition), transform var(--transition);
  box-shadow: 0 4px 16px rgba(233,69,96,0.4);
  margin-bottom: 16px;
}

.btn-login:hover  { background: var(--color-accent-dark); }
.btn-login:active { transform: scale(0.98); }
.btn-login:disabled { opacity: 0.7; cursor: not-allowed; transform: none; }

.login-help {
  font-size: 0.78rem;
  color: var(--color-muted);
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* ── Install Banner ─────────────────────────────────────────────────────── */
.install-banner {
  position: fixed;
  bottom: calc(16px + var(--safe-bottom));
  left: 16px;
  right: 16px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  z-index: 500;
  box-shadow: var(--shadow);
}

.install-banner span { flex: 1; }

.btn-install {
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  padding: 8px 16px;
  font-weight: 700;
  cursor: pointer;
}

.btn-install-dismiss {
  background: none;
  border: none;
  color: var(--color-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px 6px;
}

/* ── Error page ──────────────────────────────────────────────────────────── */
.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
}

.error-icon {
  font-size: 4rem;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.error-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 0 12px;
}

.error-msg {
  color: var(--color-muted);
  margin: 0 0 8px;
}

.error-hint {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.3);
  margin: 0;
}

/* ── Utilities ───────────────────────────────────────────────────────────── */
[hidden] { display: none !important; }