:root {
  --primary: #D84A15;
  --primary-dark: #B23A0F;
  --primary-soft: rgba(216, 74, 21, 0.08);
  --success: #10b981;
  --bg: #f5f6fa;
  --card: #ffffff;
  --border: rgba(15, 23, 42, 0.06);
  --text: #1f2937;
  --text-soft: #6b7280;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.05);
  --radius: 14px;
  --radius-lg: 20px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  font-family: 'Rubik', sans-serif;
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5 { font-family: 'Oswald', sans-serif; letter-spacing: .3px; margin: 0; }

/* Container */
.settings-container {
  width: 100%;
  min-height: 100vh;
  background: var(--bg);
}

.settings-shell {
  max-width: 1400px;
  margin: 0 auto;
  padding: clamp(1.5rem, 2vw, 2.5rem);
}

/* Header */
.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.settings-header-left h1 {
  font-size: clamp(1.6rem, 2.4vw, 2rem);
  font-weight: 700;
  color: #111827;
  margin-bottom: .35rem;
}

.settings-subtitle {
  margin: 0;
  color: var(--text-soft);
  font-size: .95rem;
}

.settings-header-actions {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}

/* Buttons */
.settings-btn {
  padding: .7rem 1.3rem;
  border-radius: 10px;
  border: none;
  font-size: .92rem;
  font-weight: 600;
  font-family: 'Rubik', sans-serif;
  cursor: pointer;
  transition: all .2s ease;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}

.settings-btn-outline {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.settings-btn-outline:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: rgba(216, 74, 21, 0.2);
}

.settings-btn-success {
  background: var(--success);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.settings-btn-success:hover {
  background: #059669;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.settings-btn-success:disabled {
  opacity: .5;
  cursor: not-allowed;
  transform: none;
}

/* Tournament Selector */
.settings-tournament-selector {
  background: var(--card);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  margin-bottom: 1.75rem;
}

.settings-tournament-selector label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: .6rem;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.settings-select {
  width: 100%;
  padding: .75rem 1rem;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: .95rem;
  font-family: 'Rubik', sans-serif;
  color: var(--text);
  background: #fff;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.settings-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

/* Tabs */
.settings-tabs {
  display: flex;
  gap: .5rem;
  margin-bottom: 1.75rem;
  overflow-x: auto;
  padding-bottom: .5rem;
}

.settings-tab {
  padding: .8rem 1.3rem;
  border: none;
  background: var(--card);
  color: var(--text-soft);
  font-size: .9rem;
  font-weight: 600;
  font-family: 'Rubik', sans-serif;
  border-radius: 10px;
  cursor: pointer;
  transition: all .2s ease;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  white-space: nowrap;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.settings-tab:hover {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: rgba(216, 74, 21, 0.2);
}

.settings-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

/* Panels */
.settings-panels {
  position: relative;
  min-height: 400px;
}

.settings-panel {
  display: none;
  animation: fadeIn .3s ease;
}

.settings-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Section */
.settings-section {
  background: var(--card);
  padding: 1.75rem 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.settings-section h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: #111827;
  margin-bottom: 1.25rem;
  padding-bottom: .75rem;
  border-bottom: 2px solid #f3f4f6;
}

/* Grid */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* Field */
.settings-field label {
  display: block;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: .5rem;
}

.settings-input {
  width: 100%;
  padding: .75rem 1rem;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: .95rem;
  font-family: 'Rubik', sans-serif;
  color: var(--text);
  background: #fff;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.settings-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.settings-input::placeholder {
  color: #9ca3af;
}

/* Checkboxes */
.settings-checkboxes {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.settings-checkbox {
  display: flex;
  align-items: center;
  gap: .75rem;
  cursor: pointer;
  font-size: .95rem;
  color: var(--text);
}

.settings-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 2px solid #d1d5db;
  cursor: pointer;
  accent-color: var(--primary);
}

.settings-checkbox input[type="checkbox"]:disabled {
  opacity: .4;
  cursor: not-allowed;
}

/* Override Cards */
.settings-override-card {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.settings-override-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}

.settings-override-header h5 {
  font-size: .98rem;
  font-weight: 600;
  color: var(--text);
}

.settings-override-body {
  padding: 1.25rem;
}

/* Toggle Switch */
.settings-toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.settings-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.settings-toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: #cbd5e1;
  border-radius: 999px;
  transition: .3s;
}

.settings-toggle-slider:before {
  content: "";
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: #fff;
  border-radius: 50%;
  transition: .3s;
}

.settings-toggle input:checked + .settings-toggle-slider {
  background: var(--primary);
}

.settings-toggle input:checked + .settings-toggle-slider:before {
  transform: translateX(20px);
}

/* Hint */
.settings-hint {
  font-size: .85rem;
  color: var(--text-soft);
  margin: .5rem 0 0;
  display: flex;
  align-items: center;
  gap: .4rem;
}

/* Loading */
.settings-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  color: var(--text-soft);
}

.settings-loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #e5e7eb;
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

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

/* Responsive */
@media (max-width: 768px) {
  .settings-header {
    flex-direction: column;
    align-items: stretch;
  }

  .settings-header-actions {
    width: 100%;
  }

  .settings-btn {
    flex: 1;
  }

  .settings-tabs {
    flex-wrap: wrap;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }

  .settings-section {
    padding: 1.25rem 1.25rem;
  }
}