/* Seminar Check-in — mobile-first stylesheet
   Accent: indigo #4f46e5
   System font stack (works offline, supports Thai out of the box)
*/

:root {
  --c-accent: #4f46e5;
  --c-accent-700: #4338ca;
  --c-accent-50: #eef2ff;
  --c-ok: #16a34a;
  --c-ok-50: #dcfce7;
  --c-warn: #d97706;
  --c-warn-50: #fef3c7;
  --c-err: #dc2626;
  --c-err-50: #fee2e2;
  --c-ink: #0f172a;
  --c-ink-2: #334155;
  --c-ink-3: #64748b;
  --c-bg: #f8fafc;
  --c-card: #ffffff;
  --c-line: #e2e8f0;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --sh-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --sh-md: 0 4px 12px rgba(15, 23, 42, .08);
  --tap: 48px;     /* min tap target */
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans Thai", "Sarabun", "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { margin: 0 0 0.5em; line-height: 1.25; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.05rem; }
p  { margin: 0 0 0.75em; color: var(--c-ink-2); }

.muted { color: var(--c-ink-3); }
.tiny  { font-size: 0.8rem; }
.center { text-align: center; }

/* Layout */
.container {
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
  padding: 16px;
}
.container.narrow { max-width: 480px; }
.container.wide   { max-width: 960px; }

header.app-header {
  background: var(--c-card);
  border-bottom: 1px solid var(--c-line);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
header.app-header .brand {
  font-weight: 700;
  color: var(--c-accent);
}
header.app-header a.back {
  color: var(--c-ink-2);
  font-size: 0.95rem;
}

main { flex: 1; padding-top: 16px; padding-bottom: 80px; }

/* Cards */
.card {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: 16px;
  box-shadow: var(--sh-sm);
  margin-bottom: 16px;
}
.card h2, .card h3 { margin-top: 0; }

/* Big buttons (landing + actions) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--tap);
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  background: var(--c-accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background .12s, transform .04s;
  text-decoration: none;
  width: 100%;
}
.btn:hover { background: var(--c-accent-700); }
.btn:active { transform: scale(0.98); }
.btn:disabled { background: var(--c-ink-3); cursor: not-allowed; }
.btn.secondary {
  background: var(--c-card);
  color: var(--c-accent);
  border-color: var(--c-accent);
}
.btn.secondary:hover { background: var(--c-accent-50); }
.btn.ghost {
  background: transparent;
  color: var(--c-accent);
  border-color: var(--c-line);
}
.btn.danger { background: var(--c-err); }
.btn.danger:hover { background: #b91c1c; }
.btn.tiny { width: auto; min-height: 36px; padding: 6px 10px; font-size: 0.85rem; }

.landing-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}
.landing-actions .btn {
  min-height: 96px;
  font-size: 1.1rem;
  flex-direction: column;
  padding: 18px;
}
.landing-actions .btn .icon { font-size: 1.6rem; }
.landing-actions .btn .sub { display: block; font-weight: 400; font-size: 0.85rem; opacity: 0.85; margin-top: 4px; }

@media (min-width: 600px) {
  .landing-actions { grid-template-columns: 1fr 1fr; }
}

/* Forms */
label.field {
  display: block;
  margin-bottom: 14px;
}
label.field > span {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: var(--c-ink-2);
  font-size: 0.95rem;
}
input[type="text"],
input[type="tel"],
input[type="number"],
input[type="search"],
textarea,
select {
  width: 100%;
  min-height: var(--tap);
  padding: 10px 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  font: inherit;
  background: #fff;
  color: var(--c-ink);
  transition: border-color .12s, box-shadow .12s;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px var(--c-accent-50);
}
textarea { min-height: 120px; font-family: inherit; }

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 600px) {
  .form-row.two { grid-template-columns: 1fr 1fr; }
}

/* Banners */
.banner {
  padding: 12px 14px;
  border-radius: var(--r-sm);
  margin-bottom: 12px;
  font-size: 0.95rem;
}
.banner.ok    { background: var(--c-ok-50);    color: #166534; border: 1px solid #86efac; }
.banner.warn  { background: var(--c-warn-50);  color: #92400e; border: 1px solid #fcd34d; }
.banner.err   { background: var(--c-err-50);   color: #991b1b; border: 1px solid #fca5a5; }
.banner.info  { background: var(--c-accent-50); color: #3730a3; border: 1px solid #c7d2fe; }

/* QR block */
.qr-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  box-shadow: var(--sh-md);
  margin: 12px 0;
}
.qr-svg {
  width: min(320px, 80vw);
  height: auto;
  display: block;
}
.qr-svg rect, .qr-svg path { shape-rendering: crispEdges; }
.qr-caption {
  margin-top: 12px;
  text-align: center;
  color: var(--c-ink-2);
}

.attendee-name {
  font-size: 1.4rem;
  font-weight: 700;
  text-align: center;
  margin: 4px 0 2px;
}
.attendee-phone {
  text-align: center;
  color: var(--c-ink-3);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

/* Token copy block */
.copy-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}
.copy-row input {
  flex: 1;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
}

/* Table */
.table-wrap { overflow-x: auto; }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
table.data th,
table.data td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--c-line);
  vertical-align: middle;
}
table.data th {
  background: var(--c-accent-50);
  color: var(--c-ink-2);
  font-weight: 600;
  white-space: nowrap;
}
table.data tr:hover td { background: #fafbff; }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}
.badge.ok  { background: var(--c-ok-50);    color: #166534; }
.badge.pending { background: var(--c-warn-50); color: #92400e; }

/* Status banners on scan page */
.scan-result {
  text-align: center;
  padding: 24px 16px;
}
.scan-result .icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin: 0 auto 12px;
}
.scan-result.ok .icon { background: var(--c-ok-50); color: var(--c-ok); }
.scan-result.warn .icon { background: var(--c-warn-50); color: var(--c-warn); }
.scan-result.err .icon { background: var(--c-err-50); color: var(--c-err); }
.scan-result h2 { font-size: 1.4rem; margin-bottom: 6px; }
.scan-result .ts { color: var(--c-ink-3); font-variant-numeric: tabular-nums; margin-top: 8px; }

/* Spinner */
.spinner {
  width: 28px; height: 28px;
  border: 3px solid var(--c-line);
  border-top-color: var(--c-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-row { display: flex; align-items: center; gap: 12px; color: var(--c-ink-3); }

/* Event list (index.html, admin.html) */
.event-list { display: flex; flex-direction: column; gap: 12px; }
.event-card {
  display: flex; flex-direction: column; gap: 10px;
  border: 1px solid var(--c-line);
  border-radius: 12px;
  padding: 14px;
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.event-card:hover { border-color: var(--c-accent); box-shadow: 0 1px 4px rgba(79,70,229,0.08); }
.event-card-title { font-weight: 700; font-size: 1.05rem; margin-bottom: 6px; }
.event-card-meta { display: flex; flex-wrap: wrap; gap: 6px; }
.meta-pill {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  background: var(--c-ink-5); color: var(--c-ink-2);
  font-size: 0.78rem; font-weight: 500;
}
.meta-pill.success { background: var(--c-ok-50); color: var(--c-ok); }
.event-card-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.event-card-actions .btn { flex: 1 1 0; min-width: 80px; padding: 8px 10px; font-size: 0.85rem; }
.btn.small { padding: 6px 12px; font-size: 0.82rem; min-height: 36px; }

.empty-state {
  text-align: center; padding: 32px 16px;
  color: var(--c-ink-3); font-size: 0.95rem;
}

/* Event banner (in-page context) */
.event-banner {
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  border: 1px solid #c7d2fe;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 14px;
}
.event-banner-title { font-weight: 700; color: var(--c-accent); font-size: 0.95rem; }
.event-banner-meta { color: var(--c-ink-2); font-size: 0.82rem; margin-top: 2px; }

/* Divider */
.divider {
  display: flex; align-items: center; gap: 10px;
  margin: 20px 0 14px;
  color: var(--c-ink-3); font-size: 0.85rem;
}
.divider::before, .divider::after {
  content: ''; flex: 1; height: 1px; background: var(--c-line);
}

/* Admin event forms */
.admin-event-form {
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  padding: 14px;
  margin-bottom: 16px;
  background: #fff;
}
.check-field {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: var(--tap);
}
.check-field input {
  width: 18px;
  height: 18px;
  accent-color: var(--c-accent);
}
.check-field span { margin: 0; }

/* Approved attendee details shown after QR */
.qr-details-card {
  border-color: #bae6fd;
  background: #f0f9ff;
}
.detail-list {
  display: grid;
  gap: 10px;
}
.detail-row {
  display: grid;
  grid-template-columns: minmax(72px, 120px) minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}
.detail-label {
  color: var(--c-ink-3);
  font-size: 0.82rem;
  font-weight: 700;
}
.detail-value {
  color: var(--c-ink);
  font-weight: 600;
  overflow-wrap: anywhere;
}
.detail-note {
  border-top: 1px solid #bae6fd;
  padding-top: 10px;
  color: var(--c-ink-2);
}
.detail-note p {
  margin: 0 0 6px;
  overflow-wrap: anywhere;
}
.detail-note p:last-child { margin-bottom: 0; }

/* Header right cluster (badge + action links) */
.header-right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.role-badge {
  background: #eef2ff; color: var(--c-accent); font-size: 0.72rem;
  padding: 4px 10px; border-radius: 999px; font-weight: 600;
}
.badge.err { background: #fee2e2; color: #b91c1c; }
.badge.info { background: #dbeafe; color: #1d4ed8; }

.slip-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 8px 0 16px;
}
@media (min-width: 760px) {
  .slip-summary-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}
.slip-summary-card {
  border: 1px solid var(--c-line);
  border-radius: 8px;
  padding: 10px;
  background: #fff;
}
.slip-summary-card.ok { background: var(--c-ok-50); border-color: #86efac; }
.slip-summary-card.warn { background: var(--c-warn-50); border-color: #fcd34d; }
.slip-summary-card.err { background: var(--c-err-50); border-color: #fca5a5; }
.slip-summary-card.info { background: #dbeafe; border-color: #93c5fd; }
.slip-summary-label { color: var(--c-ink-3); font-size: 0.76rem; line-height: 1.2; }
.slip-summary-value { color: var(--c-ink); font-size: 1.35rem; font-weight: 800; line-height: 1.1; margin-top: 4px; }

/* Danger action */
.btn.danger, .btn.ghost.danger {
  color: #b91c1c; border-color: #fecaca; background: #fff5f5;
}
.btn.danger:hover { background: #fee2e2; }

/* Tabs */
.tabs {
  display: flex; gap: 4px; border-bottom: 1px solid var(--c-line);
  margin-bottom: 12px; overflow-x: auto;
}
.tab {
  background: none; border: none; padding: 10px 14px;
  font: inherit; font-weight: 600; color: var(--c-ink-3);
  cursor: pointer; border-bottom: 2px solid transparent;
  white-space: nowrap; min-height: 44px;
}
.tab:hover { color: var(--c-accent); }
.tab.active { color: var(--c-accent); border-bottom-color: var(--c-accent); }

/* Status banners (in me.html) */
.status-banner {
  padding: 12px 14px; border-radius: 10px;
  font-weight: 600; font-size: 0.95rem;
}
.status-banner.info  { background: #dbeafe; color: #1e3a8a; border: 1px solid #93c5fd; }
.status-banner.err   { background: #fee2e2; color: #b91c1c; border: 1px solid #fca5a5; }
.status-banner.ok    { background: #d1fae5; color: #065f46; border: 1px solid #6ee7b7; }

/* Slip section (register.html) */
.slip-section { margin-top: 8px; border: 1px solid var(--c-line); border-radius: 10px; padding: 0 12px; }
.slip-section summary {
  cursor: pointer; font-weight: 600; color: var(--c-accent);
  padding: 12px 0; list-style: none; min-height: 44px;
  display: flex; align-items: center;
}
.slip-section summary::-webkit-details-marker { display: none; }
.slip-section summary::before { content: ''; }
.slip-section[open] summary { margin-bottom: 8px; }
.slip-body { padding-bottom: 12px; }
.slip-drop {
  border: 2px dashed var(--c-line); border-radius: 10px;
  padding: 16px; text-align: center; cursor: pointer;
  background: #fafafa; transition: border-color 0.15s, background 0.15s;
  min-height: 120px; display: flex; align-items: center; justify-content: center;
}
.slip-drop:hover, .slip-drop.drag { border-color: var(--c-accent); background: #eef2ff; }
.slip-placeholder { color: var(--c-ink-3); }
.slip-placeholder .icon { font-size: 2rem; margin-bottom: 6px; }
.slip-preview { max-width: 100%; max-height: 240px; border-radius: 8px; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal[hidden] { display: none !important; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.5); }
.modal-content {
  position: relative; background: #fff; border-radius: 12px;
  padding: 20px; max-width: 480px; width: 100%; max-height: 90vh;
  overflow-y: auto; box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}
.modal-close {
  position: absolute; top: 8px; right: 12px; background: none; border: none;
  font-size: 1.5rem; line-height: 1; cursor: pointer; color: var(--c-ink-3);
  min-width: 36px; min-height: 36px;
}

.slip-modal-header { margin-bottom: 12px; }
.att-name-big { font-size: 1.1rem; font-weight: 700; }
.slip-link { display: block; }
.slip-image { max-width: 100%; max-height: 360px; border-radius: 8px; border: 1px solid var(--c-line); display: block; margin: 0 auto; }
.slip-meta { margin-top: 12px; display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; }
.slip-meta .err { color: #b91c1c; }

.copy-row { display: flex; gap: 6px; }
.copy-row input { flex: 1; min-width: 0; padding: 8px 10px; font-size: 0.85rem; border: 1px solid var(--c-line); border-radius: 6px; font-family: ui-monospace, monospace; }

.badge.err { background: #fee2e2; color: #b91c1c; }


/* Footer */
.app-footer {
  text-align: center;
  color: var(--c-ink-3);
  font-size: 0.8rem;
  padding: 16px;
}

/* Utility */
.stack > * + * { margin-top: 12px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.hidden { display: none !important; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.85rem; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }

/* Mobile-only wider */
@media (max-width: 380px) {
  .container { padding: 12px; }
  h1 { font-size: 1.3rem; }
}