/* === Design Tokens === */
:root, [data-theme="light"] {
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', monospace;

  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);

  /* Light theme */
  --color-bg:             #f4f5f7;
  --color-surface:        #ffffff;
  --color-surface-2:      #f9fafb;
  --color-border:         #e2e4e8;
  --color-divider:        #ebedf0;
  --color-text:           #1a1d24;
  --color-text-muted:     #6b7280;
  --color-text-faint:     #9ca3af;
  --color-primary:        #1d4ed8;
  --color-primary-hover:  #1e40af;

  /* Player colors */
  --sinner-color:  #0066b2;
  --sinner-bg:     #e8f3fc;
  --sinner-accent: #0066b2;
  --alcaraz-color: #c2410c;
  --alcaraz-bg:    #fff3ed;
  --alcaraz-accent:#c2410c;

  --color-success:  #16a34a;
  --color-success-bg: #dcfce7;
  --color-warning:  #d97706;
  --color-warning-bg: #fef9c3;
}

[data-theme="dark"] {
  --color-bg:             #0f1117;
  --color-surface:        #1a1d27;
  --color-surface-2:      #21242f;
  --color-border:         #2d3140;
  --color-divider:        #252837;
  --color-text:           #e5e7eb;
  --color-text-muted:     #9ca3af;
  --color-text-faint:     #6b7280;
  --color-primary:        #60a5fa;
  --color-primary-hover:  #93c5fd;

  --sinner-color:  #60a5fa;
  --sinner-bg:     #1e2a42;
  --sinner-accent: #60a5fa;
  --alcaraz-color: #fb923c;
  --alcaraz-bg:    #3b2416;
  --alcaraz-accent:#fb923c;

  --color-success:  #4ade80;
  --color-success-bg: #14301d;
  --color-warning:  #fbbf24;
  --color-warning-bg: #3b2f10;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0f1117;
    --color-surface:        #1a1d27;
    --color-surface-2:      #21242f;
    --color-border:         #2d3140;
    --color-divider:        #252837;
    --color-text:           #e5e7eb;
    --color-text-muted:     #9ca3af;
    --color-text-faint:     #6b7280;
    --color-primary:        #60a5fa;
    --color-primary-hover:  #93c5fd;
    --sinner-color:  #60a5fa;
    --sinner-bg:     #1e2a42;
    --sinner-accent: #60a5fa;
    --alcaraz-color: #fb923c;
    --alcaraz-bg:    #3b2416;
    --alcaraz-accent:#fb923c;
    --color-success:  #4ade80;
    --color-success-bg: #14301d;
    --color-warning:  #fbbf24;
    --color-warning-bg: #3b2f10;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  }
}

/* === Header === */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}
.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text);
}
.logo svg { color: var(--color-primary); flex-shrink: 0; }
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.header-date {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}
[data-theme-toggle] {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
[data-theme-toggle]:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

/* === Main === */
.main {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5) var(--space-12);
}

/* === Scoreboard === */
.scoreboard {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-4);
  align-items: stretch;
  margin-bottom: var(--space-6);
}
.player-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-4);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.player-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}
.sinner-card::before { background: var(--sinner-color); }
.alcaraz-card::before { background: var(--alcaraz-color); }

.player-flag {
  font-size: 2rem;
  margin-bottom: var(--space-1);
}
.player-name {
  font-weight: 700;
  font-size: var(--text-sm);
  margin-bottom: var(--space-1);
}
.player-rank {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: var(--space-3);
}
.player-points-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
  margin-bottom: var(--space-1);
}
.player-points {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.sinner-card .player-points { color: var(--sinner-color); }
.alcaraz-card .player-points { color: var(--alcaraz-color); }

/* VS Badge */
.vs-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-2);
  min-width: 90px;
}
.gap-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.gap-value {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
  white-space: nowrap;
}
.gap-bar-container {
  width: 80px;
  height: 6px;
  background: var(--color-divider);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}
.gap-bar {
  height: 100%;
  border-radius: 3px;
  transition: width 0.4s ease, background 0.4s ease;
  background: var(--color-text-faint);
}

/* === Status Bar === */
.status-bar {
  background: var(--color-warning-bg);
  border: 1px solid color-mix(in srgb, var(--color-warning) 25%, transparent);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-8);
}
.status-bar.status-success {
  background: var(--color-success-bg);
  border-color: color-mix(in srgb, var(--color-success) 25%, transparent);
}
.status-icon { flex-shrink: 0; }

/* === Section Titles === */
.section-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.section-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

/* === Preset Bar === */
.preset-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.preset-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  white-space: nowrap;
}
.preset-btn:hover {
  background: var(--color-surface-2);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.preset-reset {
  color: var(--color-text-muted);
}
.preset-reset:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

/* === Tournament Grid === */
.tournament-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

.tournament-row {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-4);
  align-items: center;
}

.tournament-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.tournament-name {
  font-weight: 600;
  font-size: var(--text-sm);
}
.tournament-cat {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.tournament-dates {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.player-select-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.select-label {
  font-size: var(--text-xs);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.select-label.sinner-label { color: var(--sinner-color); }
.select-label.alcaraz-label { color: var(--alcaraz-color); }

.result-select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239ca3af' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
}
.result-select:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-primary) 20%, transparent);
}

.points-change {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  margin-top: var(--space-1);
}
.points-change.positive { color: var(--color-success); }
.points-change.negative { color: var(--color-text-faint); }

/* === Defend Section === */
.defend-section {
  margin-bottom: var(--space-10);
}
.defend-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.defend-col {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.defend-player {
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-divider);
}
.sinner-accent { color: var(--sinner-color); }
.alcaraz-accent { color: var(--alcaraz-color); }

.defend-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-xs);
}
.defend-item:last-child { border-bottom: none; }
.defend-tournament {
  font-weight: 500;
  color: var(--color-text);
}
.defend-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.defend-pts {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
}
.defend-date {
  color: var(--color-text-faint);
  min-width: 70px;
  text-align: right;
}

/* === Reference Table === */
.reference-section {
  margin-bottom: var(--space-10);
}
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.points-table {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.points-table th,
.points-table td {
  padding: var(--space-2) var(--space-4);
  text-align: center;
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
  border-bottom: 1px solid var(--color-divider);
}
.points-table th {
  background: var(--color-surface-2);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.points-table td:first-child {
  font-weight: 600;
  text-align: left;
}
.points-table tbody tr:last-child td { border-bottom: none; }
.points-table tbody tr:hover { background: var(--color-surface-2); }

/* === Footer === */
.footer {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer a:hover { color: var(--color-primary); text-decoration: underline; }

/* === Mobile === */
@media (max-width: 700px) {
  .scoreboard {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }
  .vs-badge {
    grid-column: 1 / -1;
    flex-direction: row;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-2) 0;
    order: -1;
  }
  .gap-bar-container { width: 60px; }

  .tournament-row {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding: var(--space-4);
  }
  .tournament-row .player-select-group {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-2);
    align-items: center;
  }
  .tournament-row .player-select-group .points-change {
    grid-column: 1 / -1;
  }

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

  .player-card { padding: var(--space-4) var(--space-3); }
  .player-points { font-size: var(--text-lg); }
}