/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #16a34a;
  --success-light: #dcfce7;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== Layout ===== */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px;
  background: var(--gray-900);
  color: white;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.sidebar-logo {
  padding: 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.sidebar-logo h1 { font-size: 16px; font-weight: 700; color: white; }
.sidebar-logo p { font-size: 11px; color: var(--gray-400); margin-top: 2px; }

.sidebar-nav { flex: 1; padding: 8px 0; overflow-y: auto; }
.nav-section-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 12px 16px 4px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  color: var(--gray-300);
  text-decoration: none;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}
.nav-item:hover { background: rgba(255,255,255,0.07); color: white; }
.nav-item.active {
  background: rgba(37,99,235,0.2);
  color: #93c5fd;
  border-left-color: var(--primary);
}
.nav-item .icon { font-size: 16px; width: 20px; text-align: center; }

.main-content {
  margin-left: 240px;
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-header {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.page-header h2 { font-size: 20px; font-weight: 700; color: var(--gray-900); }

.page-body { padding: 24px 28px; flex: 1; }

/* ===== Cards ===== */
.card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.card-header h3 { font-size: 15px; font-weight: 600; color: var(--gray-800); }
.card-body { padding: 20px; }

.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }

.stat-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.stat-card .label { font-size: 12px; color: var(--gray-500); font-weight: 500; }
.stat-card .value { font-size: 28px; font-weight: 700; color: var(--gray-900); margin-top: 4px; }
.stat-card .sub { font-size: 12px; color: var(--gray-400); margin-top: 2px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-success { background: var(--success); color: white; border-color: var(--success); }
.btn-success:hover:not(:disabled) { background: #15803d; }
.btn-danger { background: var(--danger); color: white; border-color: var(--danger); }
.btn-danger:hover:not(:disabled) { background: #b91c1c; }
.btn-warning { background: var(--warning); color: white; border-color: var(--warning); }
.btn-warning:hover:not(:disabled) { background: #b45309; }
.btn-outline { background: white; color: var(--gray-700); border-color: var(--gray-300); }
.btn-outline:hover:not(:disabled) { background: var(--gray-50); border-color: var(--gray-400); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 16px; }

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th {
  background: var(--gray-50);
  padding: 10px 14px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--gray-200);
}
td {
  padding: 12px 14px;
  font-size: 14px;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}
tr:hover td { background: var(--gray-50); }
tr:last-child td { border-bottom: none; }

/* ===== Forms ===== */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-group label .required { color: var(--danger); margin-left: 2px; }
.form-control {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--gray-800);
  background: white;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-row { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; }
.form-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: fadeIn 0.15s ease;
}
.modal {
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.2s ease;
}
.modal-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-header h3 { font-size: 17px; font-weight: 700; }
.modal-close {
  cursor: pointer;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
  color: var(--gray-400);
  font-size: 20px;
  border: none; background: none;
  transition: all 0.15s;
}
.modal-close:hover { background: var(--gray-100); color: var(--gray-700); }
.modal-body { padding: 20px 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
  display: flex; gap: 8px; justify-content: flex-end;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(16px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
}
.badge-blue { background: var(--primary-light); color: var(--primary-dark); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-yellow { background: var(--warning-light); color: var(--warning); }
.badge-red { background: var(--danger-light); color: var(--danger); }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }

/* ===== Alert ===== */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.alert-success { background: var(--success-light); color: #15803d; border: 1px solid #86efac; }
.alert-error { background: var(--danger-light); color: #b91c1c; border: 1px solid #fca5a5; }
.alert-warning { background: var(--warning-light); color: #92400e; border: 1px solid #fcd34d; }
.alert-info { background: var(--primary-light); color: var(--primary-dark); border: 1px solid #93c5fd; }

/* ===== Match Card ===== */
.match-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  background: white;
  transition: box-shadow 0.15s;
}
.match-card:hover { box-shadow: var(--shadow-md); }
.match-card.completed { border-left: 4px solid var(--success); }
.match-card.in_progress { border-left: 4px solid var(--warning); }
.match-card.pending { border-left: 4px solid var(--gray-300); }

.match-players {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.match-player {
  flex: 1;
  text-align: center;
}
.match-player .name { font-size: 16px; font-weight: 600; }
.match-player .rating { font-size: 12px; color: var(--gray-400); }
.match-player.winner .name { color: var(--success); }
.match-vs { font-size: 20px; font-weight: 700; color: var(--gray-300); }

.match-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--gray-500);
}

.game-scores {
  display: flex;
  gap: 8px;
  margin: 8px 0;
  flex-wrap: wrap;
}
.game-score {
  background: var(--gray-100);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 13px;
  font-weight: 600;
}

/* ===== Score Input ===== */
.score-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.score-input-row input[type=number] {
  width: 70px;
  padding: 8px;
  text-align: center;
  font-size: 20px;
  font-weight: 700;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
}
.score-input-row input[type=number]:focus {
  border-color: var(--primary);
  outline: none;
}
.score-sep { font-size: 20px; font-weight: 700; color: var(--gray-300); }

/* ===== QR ===== */
.qr-container {
  text-align: center;
  padding: 24px;
}
.qr-container img { max-width: 260px; border: 4px solid white; box-shadow: var(--shadow-md); border-radius: 8px; }
.qr-url {
  margin-top: 12px;
  font-size: 12px;
  color: var(--gray-500);
  word-break: break-all;
}

/* ===== Tabs ===== */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--gray-200); margin-bottom: 20px; }
.tab-btn {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-500);
  cursor: pointer;
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.15s;
}
.tab-btn:hover { color: var(--gray-800); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== Standings ===== */
.standings-table .rank { font-weight: 700; font-size: 18px; color: var(--gray-700); }
.standings-table tr:nth-child(1) td:first-child { color: #ca8a04; }
.standings-table tr:nth-child(2) td:first-child { color: var(--gray-500); }
.standings-table tr:nth-child(3) td:first-child { color: #b45309; }

/* ===== Search Bar ===== */
.search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.search-input-wrap {
  position: relative;
  flex: 1;
  min-width: 200px;
}
.search-input-wrap .search-icon {
  position: absolute;
  left: 10px; top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  font-size: 14px;
}
.search-input-wrap input {
  padding-left: 32px;
}

/* ===== Slots ===== */
.slot-group {
  margin-bottom: 20px;
}
.slot-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  padding: 4px 0;
  border-bottom: 1px solid var(--gray-100);
}
.slot-matches { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px; }

/* ===== Play Page ===== */
.play-page { max-width: 640px; margin: 0 auto; padding: 16px; }
.play-header {
  background: var(--primary);
  color: white;
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  text-align: center;
}
.play-header h1 { font-size: 22px; font-weight: 700; }
.play-header p { font-size: 14px; opacity: 0.8; margin-top: 4px; }

/* ===== Rating Check ===== */
.rating-check-page { max-width: 560px; margin: 0 auto; }
.rating-display {
  text-align: center;
  padding: 32px;
  background: var(--primary-light);
  border-radius: var(--radius);
  margin-bottom: 20px;
}
.rating-display .rating-value {
  font-size: 64px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}
.rating-display .player-name { font-size: 20px; font-weight: 600; color: var(--gray-800); margin-top: 8px; }

/* ===== Toast ===== */
#toast-container {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  background: var(--gray-900);
  color: white;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.25s ease;
  max-width: 320px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ===== Misc ===== */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--gray-400);
}
.empty-state .icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 14px; }

.divider { border: none; border-top: 1px solid var(--gray-200); margin: 20px 0; }

.text-sm { font-size: 13px; }
.text-xs { font-size: 11px; }
.text-muted { color: var(--gray-400); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.fw-bold { font-weight: 700; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar { width: 200px; }
  .main-content { margin-left: 200px; }
  .form-row { grid-template-columns: 1fr; }
  .page-body { padding: 16px; }
}
@media (max-width: 600px) {
  .sidebar { display: none; }
  .main-content { margin-left: 0; }
}