/* ============================================================
   Subway × Trip to Korea — Mobile-First Stylesheet
   Colours: Subway green #009843, Korean red #CD2E3A,
            Korean blue #003478, warm cream #f5f5f0
   ============================================================ */

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

:root {
  --subway-green:      #009843;
  --subway-green-dark: #007a35;
  --subway-yellow:     #FFC425;
  --korea-red:         #CD2E3A;
  --korea-blue:        #003478;
  --color-primary:     #009843;
  --color-primary-dark:#007a35;
  --color-accent:      #CD2E3A;
  --color-bg:          #f5f5f0;
  --color-surface:     #ffffff;
  --color-text:        #1a1a1a;
  --color-text-muted:  #6b7280;
  --color-border:      #e5e7eb;
  --color-success:     #009843;
  --color-success-bg:  #d1fae5;
  --color-error:       #CD2E3A;
  --color-error-bg:    #fee2e2;
  --color-warning:     #f59e0b;
  --color-warning-bg:  #fef3c7;
  --color-pending:     #f59e0b;
  --color-verified:    #009843;
  --color-rejected:    #CD2E3A;

  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --shadow-sm:  0 1px 4px rgba(0,0,0,.08);
  --shadow-md:  0 4px 20px rgba(0,0,0,.10);
  --shadow-lg:  0 8px 40px rgba(0,0,0,.14);
  --font:       'Inter', 'Noto Sans KR', system-ui, sans-serif;
  --transition: 0.2s ease;
}

html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--color-bg); color: var(--color-text); line-height: 1.6; min-height: 100vh; }

h1,h2,h3,h4 { line-height: 1.2; font-weight: 800; }
h1 { font-size: clamp(2rem, 7vw, 3rem); }
h2 { font-size: clamp(1.25rem, 4vw, 1.6rem); }
h3 { font-size: 1.1rem; }
p  { margin-bottom: .75rem; }
a  { color: var(--subway-green); text-decoration: none; font-weight: 600; }
a:hover { text-decoration: underline; }

.container { width: 100%; max-width: 520px; margin: 0 auto; padding: 0 1rem; }

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(160deg, #003478 0%, #009843 60%, #FFC425 100%);
  color: #fff;
  padding: 3rem 1rem 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Seoul skyline silhouette pattern */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255,196,37,.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0,152,67,.2) 0%, transparent 50%);
  pointer-events: none;
}

/* floating bokeh dots */
.hero::after {
  content: '✈️';
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  font-size: 2rem;
  opacity: .5;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%,100% { transform: translateY(0) rotate(-10deg); }
  50%      { transform: translateY(-10px) rotate(5deg); }
}

.hero-content { position: relative; z-index: 1; }

.hero-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  margin-bottom: 1.25rem;
}
.subway-logo {
  background: var(--subway-yellow);
  color: #1a1a1a;
  font-weight: 900;
  font-size: 1.25rem;
  padding: .3rem .9rem;
  border-radius: 6px;
  letter-spacing: .04em;
}
.subway-logo span { font-size: .65rem; vertical-align: super; }
.hero-x { font-size: 1.5rem; font-weight: 900; opacity: .8; }
.korea-flag { font-size: 2.25rem; }

.hero h1 { margin-bottom: .5rem; text-shadow: 0 2px 8px rgba(0,0,0,.3); }
.korea-text {
  color: var(--subway-yellow);
  display: inline-block;
  position: relative;
}
.korea-text::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 3px;
  background: var(--subway-yellow);
  border-radius: 2px;
}

.hero p { font-size: 1.0625rem; opacity: .92; margin-bottom: 1rem; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  justify-content: center;
}
.hero-meta span {
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 999px;
  padding: .3rem .875rem;
  font-size: .8125rem;
  font-weight: 600;
  backdrop-filter: blur(4px);
}

/* Wave divider */
.hero-wave {
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  line-height: 0;
}
.hero-wave svg { width: 100%; height: 60px; }

/* ── Card ──────────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  margin: -2rem auto 1.25rem;
  position: relative;
  z-index: 2;
}
@media(min-width:480px){ .card { padding: 2rem; } }

.card-header {
  text-align: center;
  margin-bottom: 1.5rem;
}
.card-icon { font-size: 2.5rem; margin-bottom: .5rem; }
.card-header h2 { color: var(--color-text); margin-bottom: .3rem; }
.card-header p { color: var(--color-text-muted); font-size: .9375rem; margin: 0; }

/* ── Prize card ────────────────────────────────────────────── */
.prize-card {
  background: linear-gradient(135deg, var(--korea-blue) 0%, #005db6 100%);
  color: #fff;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 0 auto 1.25rem;
  box-shadow: var(--shadow-md);
}
.prize-header {
  font-size: 1.125rem;
  font-weight: 800;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.prize-items { display: flex; flex-direction: column; gap: .625rem; }
.prize-item {
  display: flex;
  align-items: center;
  gap: .625rem;
  font-size: .9375rem;
  background: rgba(255,255,255,.1);
  border-radius: var(--radius-sm);
  padding: .5rem .875rem;
}

/* ── How It Works ──────────────────────────────────────────── */
.steps-list { display: flex; flex-direction: column; gap: 1rem; margin-top: 1rem; }
.step-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: .9375rem;
}
.step-circle {
  width: 3rem;
  height: 3rem;
  min-width: 3rem;
  background: #f0fdf4;
  border: 2px solid var(--subway-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375rem;
}
.step-item small { color: var(--color-text-muted); font-size: .8125rem; }

/* ── Form ──────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.125rem; }
.form-label {
  display: block;
  font-size: .875rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: .375rem;
}
.required { color: var(--color-error); margin-left: .1rem; }
.form-control {
  display: block;
  width: 100%;
  padding: .75rem 1rem;
  font-size: 1rem;
  font-family: var(--font);
  color: var(--color-text);
  background: #fafafa;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -webkit-appearance: none;
}
.form-control:focus {
  border-color: var(--subway-green);
  box-shadow: 0 0 0 3px rgba(0,152,67,.15);
  background: #fff;
}
.form-control.is-invalid {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(205,46,58,.12);
}
.form-control.is-valid { border-color: var(--subway-green); }
.form-hint { font-size: .75rem; color: var(--color-text-muted); margin-top: .3rem; }
.invalid-feedback { font-size: .8125rem; color: var(--color-error); margin-top: .3rem; display: none; }
.form-control.is-invalid ~ .invalid-feedback { display: block; }

/* ── Upload ────────────────────────────────────────────────── */
.upload-area {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  position: relative;
  background: #fafafa;
}
.upload-area:hover, .upload-area.drag-over {
  border-color: var(--subway-green);
  background: #f0fdf4;
}
.upload-area.has-file {
  border-color: var(--subway-green);
  background: #f0fdf4;
}
.upload-area input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%;
}
.upload-icon { font-size: 2.5rem; margin-bottom: .5rem; display: block; }
.upload-title { font-weight: 700; font-size: 1rem; margin-bottom: .25rem; color: var(--color-text); }
.upload-sub { font-size: .8125rem; color: var(--color-text-muted); }
.upload-preview { display: none; margin-top: 1rem; }
.upload-preview img {
  max-width: 100%; max-height: 180px; border-radius: var(--radius-sm);
  object-fit: cover; box-shadow: var(--shadow-sm);
}
.upload-filename { font-size: .8125rem; color: var(--color-text-muted); margin-top: .375rem; }

/* ── Checkbox ──────────────────────────────────────────────── */
.form-check { display: flex; align-items: flex-start; gap: .625rem; margin-bottom: 1.25rem; }
.form-check input[type="checkbox"] {
  width: 1.125rem; height: 1.125rem; min-width: 1.125rem;
  accent-color: var(--subway-green); margin-top: .125rem; cursor: pointer;
}
.form-check-label { font-size: .875rem; color: var(--color-text-muted); cursor: pointer; line-height: 1.4; }

/* ── Button ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .9375rem 1.5rem; font-size: 1.0625rem; font-weight: 800; font-family: var(--font);
  border: none; border-radius: var(--radius-sm); cursor: pointer;
  transition: all var(--transition); white-space: nowrap; -webkit-appearance: none;
  letter-spacing: .02em;
}
.btn-primary {
  background: linear-gradient(135deg, var(--subway-green) 0%, var(--subway-green-dark) 100%);
  color: #fff; width: 100%;
  box-shadow: 0 4px 14px rgba(0,152,67,.35);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,152,67,.45);
}
.btn-primary:active:not(:disabled) { transform: translateY(0); box-shadow: none; }
.btn-primary:disabled { opacity: .65; cursor: not-allowed; }
.btn-secondary {
  background: var(--color-bg); color: var(--color-text);
  border: 2px solid var(--color-border); font-size: .875rem; font-weight: 700;
}
.btn-secondary:hover:not(:disabled) { background: #e5e7eb; }
.btn-sm { padding: .4375rem .875rem; font-size: .875rem; }
.btn-danger { background: var(--color-error); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #a82432; }
.btn-success { background: var(--subway-green); color: #fff; }

.btn .spinner {
  width: 1.125rem; height: 1.125rem;
  border: 2.5px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .65s linear infinite;
  display: none;
}
.btn.loading .spinner { display: block; }
.btn.loading .btn-text { opacity: .6; }

/* ── Steps indicator ───────────────────────────────────────── */
.steps {
  display: flex; align-items: center; justify-content: center;
  gap: 0; margin-bottom: 1.5rem;
}
.step {
  display: flex; align-items: center; gap: .375rem;
  font-size: .8125rem; font-weight: 700; color: var(--color-text-muted);
}
.step.active { color: var(--subway-green); }
.step.done   { color: var(--subway-green); }
.step-num {
  width: 1.625rem; height: 1.625rem; border-radius: 50%;
  background: var(--color-border); color: var(--color-text-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: .7rem; font-weight: 800;
}
.step.active .step-num { background: var(--subway-green); color: #fff; }
.step.done   .step-num { background: var(--subway-green); color: #fff; }
.step-divider { flex: 1; height: 2px; background: var(--color-border); margin: 0 .5rem; max-width: 3rem; }

/* ── Alerts ────────────────────────────────────────────────── */
.alert {
  padding: .875rem 1rem; border-radius: var(--radius-sm);
  font-size: .9375rem; display: flex; gap: .625rem;
  align-items: flex-start; margin-bottom: 1rem;
}
.alert-icon { font-size: 1.125rem; line-height: 1; flex-shrink: 0; }
.alert-success { background: var(--color-success-bg); color: #065f46; border-left: 4px solid var(--subway-green); }
.alert-error   { background: var(--color-error-bg);   color: #7f1d1d; border-left: 4px solid var(--color-error); }
.alert-warning { background: var(--color-warning-bg); color: #78350f; border-left: 4px solid var(--color-warning); }

/* ── Success state ─────────────────────────────────────────── */
.success-state { text-align: center; padding: 1.5rem 1rem; }
.success-icon {
  width: 5rem; height: 5rem;
  background: linear-gradient(135deg, #f0fdf4, #dcfce7);
  border-radius: 50%; display: flex; align-items: center;
  justify-content: center; font-size: 2.25rem;
  margin: 0 auto 1rem;
  box-shadow: 0 4px 16px rgba(0,152,67,.2);
}
.success-state h2 { color: var(--subway-green); margin-bottom: .5rem; }
.success-state p { color: var(--color-text-muted); margin-bottom: 0; }

/* ── Footer ────────────────────────────────────────────────── */
footer {
  text-align: center; padding: 2.5rem 1rem;
  font-size: .8125rem; color: var(--color-text-muted);
}
.footer-brand {
  font-weight: 900; font-size: 1rem; color: var(--subway-green);
  margin-bottom: .375rem; letter-spacing: .04em;
}
.footer-brand span { font-size: .6rem; vertical-align: super; }
footer a { color: var(--color-text-muted); }
footer a:hover { color: var(--subway-green); }

/* ── Animations ────────────────────────────────────────────── */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn .4s ease forwards; }

/* ── ======================================================= */
/*    ADMIN PAGE                                               */
/* ── ======================================================= */
.admin-header {
  background: linear-gradient(135deg, #003478 0%, #005db6 100%);
  color: #fff; padding: 1rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: .75rem;
}
.admin-header h1 { font-size: 1.125rem; font-weight: 800; }
.admin-header .admin-actions { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }

.admin-main { padding: 1.25rem 1rem; max-width: 1280px; margin: 0 auto; }

.stats-bar {
  display: grid; grid-template-columns: repeat(2,1fr);
  gap: .75rem; margin-bottom: 1.25rem;
}
@media(min-width:640px){ .stats-bar { grid-template-columns: repeat(4,1fr); } }
.stat-card {
  background: var(--color-surface); border-radius: var(--radius-sm);
  padding: 1rem; box-shadow: var(--shadow-sm); text-align: center;
}
.stat-num { font-size: 1.75rem; font-weight: 900; line-height: 1; margin-bottom: .25rem; }
.stat-label { font-size: .75rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: .05em; }
.stat-card.total   .stat-num { color: var(--korea-blue); }
.stat-card.pending  .stat-num { color: var(--color-pending); }
.stat-card.verified .stat-num { color: var(--subway-green); }
.stat-card.rejected .stat-num { color: var(--color-rejected); }

.filter-bar {
  background: var(--color-surface); border-radius: var(--radius-sm);
  padding: .875rem 1rem; display: flex; flex-wrap: wrap;
  gap: .5rem; margin-bottom: 1rem; box-shadow: var(--shadow-sm); align-items: center;
}
.filter-label { font-size: .8125rem; font-weight: 700; color: var(--color-text-muted); }
.filter-btn {
  padding: .3125rem .875rem; border-radius: 999px;
  border: 2px solid var(--color-border); background: transparent;
  font-size: .8125rem; font-weight: 700; cursor: pointer;
  transition: all var(--transition); color: var(--color-text);
}
.filter-btn:hover { border-color: var(--subway-green); color: var(--subway-green); }
.filter-btn.active { background: var(--subway-green); color: #fff; border-color: var(--subway-green); }
.filter-btn.pending.active  { background: var(--color-pending);  border-color: var(--color-pending);  color: #000; }
.filter-btn.verified.active { background: var(--subway-green); border-color: var(--subway-green); color: #fff; }
.filter-btn.rejected.active { background: var(--color-rejected); border-color: var(--color-rejected); color: #fff; }

.table-wrap { background: var(--color-surface); border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); overflow: hidden; }
.entries-table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.entries-table thead tr { background: #f9fafb; border-bottom: 2px solid var(--color-border); }
.entries-table th {
  padding: .625rem .875rem; text-align: left;
  font-size: .75rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .05em; color: var(--color-text-muted); white-space: nowrap;
}
.entries-table td {
  padding: .75rem .875rem; border-bottom: 1px solid #f3f4f6;
  vertical-align: top; max-width: 200px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.entries-table tr:last-child td { border-bottom: none; }
.entries-table tr:hover td { background: #f9fafb; }

.badge {
  display: inline-block; padding: .2rem .55rem; border-radius: 999px;
  font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .04em;
}
.badge-pending  { background: #fef3c7; color: #78350f; }
.badge-verified { background: #d1fae5; color: #065f46; }
.badge-rejected { background: #fee2e2; color: #7f1d1d; }

.receipt-thumb {
  width: 2.5rem; height: 2.5rem; object-fit: cover;
  border-radius: var(--radius-sm); cursor: pointer;
  border: 2px solid var(--color-border); transition: transform var(--transition);
}
.receipt-thumb:hover { transform: scale(1.1); }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: 1rem; animation: fadeIn .2s ease;
}
.modal-box {
  background: var(--color-surface); border-radius: var(--radius-md);
  padding: 1.5rem; max-width: 560px; width: 100%;
  max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow-lg);
}
.modal-box img { width: 100%; border-radius: var(--radius-sm); margin-bottom: 1rem; }
.modal-close {
  float: right; background: none; border: none; font-size: 1.5rem;
  cursor: pointer; color: var(--color-text-muted); line-height: 1; padding: 0 .25rem;
}
.modal-close:hover { color: var(--color-error); }

.draw-banner {
  background: linear-gradient(135deg, var(--korea-red) 0%, #a02232 100%);
  color: #fff; border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem; display: flex;
  align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: .75rem; margin-bottom: 1.25rem; box-shadow: var(--shadow-md);
}
.draw-banner-text h2 { font-size: 1rem; margin-bottom: .2rem; }
.draw-banner-text p  { font-size: .8125rem; opacity: .75; margin: 0; }

.login-screen {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--korea-blue) 0%, var(--subway-green) 100%);
}
.login-card {
  background: var(--color-surface); border-radius: var(--radius-md);
  padding: 2rem; width: 100%; max-width: 360px;
  box-shadow: var(--shadow-lg); text-align: center;
}
.login-card h1 { font-size: 1.375rem; margin-bottom: .375rem; }
.login-card p  { color: var(--color-text-muted); font-size: .875rem; margin-bottom: 1.5rem; }

.empty-state { padding: 3rem 1rem; text-align: center; color: var(--color-text-muted); }
.empty-icon  { font-size: 2.5rem; margin-bottom: .5rem; }

.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e8e8e8 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite; border-radius: var(--radius-sm);
}
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }

@media(max-width:480px) {
  .admin-main { padding: .75rem .5rem; }
  .entries-table th:nth-child(4), .entries-table td:nth-child(4) { display: none; }
}

/* ── Phone prefix ────────────────────────────────────────────── */
.phone-input-wrap {
  display: flex;
  align-items: stretch;
}
.phone-prefix {
  background: #e5e7eb;
  border: 1.5px solid #d1d5db;
  border-right: none;
  padding: 0 .9rem;
  border-radius: 10px 0 0 10px;
  font-size: .95rem;
  font-weight: 600;
  color: #374151;
  display: flex;
  align-items: center;
  white-space: nowrap;
  user-select: none;
}
.phone-field {
  border-radius: 0 10px 10px 0 !important;
  flex: 1;
}

/* ── Alert types ─────────────────────────────────────────────── */
.alert-error   { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
/* Fix prize layout */
.prize-item {
  display: block; /* override flex */
}

.prize-title {
  font-weight: 700;
  margin-bottom: 10px;
}

.prize-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.prize-line {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}

.icon {
  font-size: 18px;
}