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

:root {
  --bg:          #0d1117;
  --bg2:         #161b22;
  --bg3:         #21262d;
  --border:      #30363d;
  --accent:      #58a6ff;
  --green:       #3fb950;
  --red:         #f85149;
  --orange:      #d29922;
  --text:        #e6edf3;
  --text-muted:  #8b949e;
  --radius:      10px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

/* ===== App layout ===== */
#app {
  display: flex;
  flex-direction: column;
  height: 100dvh;   /* dynamic viewport height (mobile safe) */
  max-width: 800px;
  margin: 0 auto;
}

/* ===== Nickname modal ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.visible {
  display: flex;
}

.modal-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.modal-box h2 {
  font-size: 1.2rem;
  color: var(--accent);
  margin: 0;
}
.modal-box p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}
.modal-box input {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 1.1rem;
  padding: 0 14px;
  height: 52px;
  outline: none;
  transition: border-color 0.15s;
  -webkit-appearance: none;
}
.modal-box input:focus { border-color: var(--accent); }
.modal-box input.input-error { border-color: var(--red); background: #2a0d0d; }
.modal-box button {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  height: 52px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.modal-box button:active { transform: scale(0.97); }

/* Přezdívka v headeru */
.nickname-badge {
  background: none;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 4px 10px;
  cursor: pointer;
  white-space: nowrap;
  max-width: 130px;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: border-color 0.15s, color 0.15s;
  flex-shrink: 0;
}
.nickname-badge:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Header ===== */
#header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
}

#header h1 {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent);
  flex-shrink: 0;
}

#phase-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-left: auto;
  text-align: right;
}

/* ===== Section titles ===== */
.section-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  padding: 8px 16px 4px;
}

/* ===== Heat section (top) ===== */
#heat-section {
  flex: 1 1 0;
  min-height: 120px;
  overflow-y: auto;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

#heat-list {
  flex: 1;
  padding: 6px 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.heat-empty {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  margin: auto;
  padding: 20px;
}

/* ===== Racer card ===== */
.racer-card {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  min-height: 52px;
  transition: background 0.2s;
}

.racer-card.card-running {
  border-color: var(--green);
  background: #0d2119;
}

.racer-card.card-done {
  border-color: var(--border);
  background: var(--bg3);
  opacity: 0.85;
}

.racer-num {
  font-size: 1.4rem;
  font-weight: 700;
  min-width: 56px;
  color: var(--text);
}

.racer-time {
  flex: 1;
  font-size: 1.3rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: 1px;
  color: var(--green);
}

.card-done .racer-time {
  color: var(--text-muted);
}

/* Remove button (SETUP) */
.btn-remove {
  margin-left: auto;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  width: 32px;
  height: 32px;
  font-size: 1rem;
  cursor: pointer;
  line-height: 1;
  transition: border-color 0.15s, color 0.15s;
}
.btn-remove:hover, .btn-remove:active {
  border-color: var(--red);
  color: var(--red);
}

/* STOP button */
.btn-stop {
  margin-left: auto;
  background: var(--red);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 18px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  min-width: 80px;
  min-height: 44px;
  letter-spacing: 0.5px;
  transition: background 0.15s, transform 0.1s;
}
.btn-stop:active {
  background: #c0392b;
  transform: scale(0.96);
}

/* DNF badge */
.badge-done {
  margin-left: auto;
  font-size: 0.75rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  color: var(--text-muted);
}

/* Rank badge (1., 2., ...) */
.rank-badge {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 32px;
  text-align: right;
}

/* Edit order button */
.btn-edit-order {
  flex: 1;
  background: var(--orange);
  color: #000;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  min-height: 52px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-edit-order:active { transform: scale(0.97); }

/* Done edit button */
.btn-done-edit {
  flex: 1;
  background: var(--green);
  color: #000;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  min-height: 52px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-done-edit:active { transform: scale(0.97); }

/* Editable card in edit mode */
.racer-card.editable {
  cursor: pointer;
  border-color: var(--orange);
}
.racer-card.editable:hover {
  background: #1e1a0d;
}

/* Selected card (first tap) */
.racer-card.card-selected {
  border-color: var(--orange) !important;
  background: #2a1e00 !important;
  box-shadow: 0 0 0 2px var(--orange);
}

/* Edit mode hint banner */
.edit-mode-hint {
  font-size: 0.78rem;
  color: var(--orange);
  text-align: center;
  padding: 4px 12px 2px;
  letter-spacing: 0.3px;
}

/* ===== Controls section ===== */
#controls-section {
  flex-shrink: 0;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Lock / slide row */
#lock-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#slide-track {
  position: relative;
}

#slide-hint {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-align: center;
}

/* Custom range slider */
#lock-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 46px;
  border-radius: 23px;
  outline: none;
  cursor: pointer;
  background: linear-gradient(
    to right,
    var(--green) 0%,
    var(--green) var(--val, 0%),
    var(--bg3) var(--val, 0%),
    var(--bg3) 100%
  );
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}
#lock-slider.slider-full {
  border-color: var(--green);
}
#lock-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 56px;
  height: 44px;
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
  cursor: grab;
  transition: background 0.15s;
}
#lock-slider::-moz-range-thumb {
  width: 56px;
  height: 44px;
  border-radius: 22px;
  background: #fff;
  border: none;
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
  cursor: grab;
}
#lock-slider:disabled {
  opacity: 0.4;
  cursor: default;
}

#lock-status {
  font-size: 0.8rem;
  text-align: center;
  color: var(--text-muted);
  min-height: 18px;
}
#lock-status.status-locked {
  color: var(--green);
  font-weight: 600;
}

/* Action buttons row */
#action-row {
  display: flex;
  gap: 10px;
}

.btn-start {
  flex: 1;
  background: var(--green);
  color: #000;
  border: none;
  border-radius: var(--radius);
  font-size: 1.2rem;
  font-weight: 700;
  min-height: 52px;
  cursor: pointer;
  letter-spacing: 1px;
  transition: background 0.15s, transform 0.1s, opacity 0.2s;
}
.btn-start:disabled {
  background: var(--bg3);
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.6;
}
.btn-start:not(:disabled):active {
  transform: scale(0.97);
  background: #2ea043;
}

.btn-reset {
  background: var(--bg3);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  min-height: 52px;
  min-width: 80px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.btn-reset:hover, .btn-reset:active {
  background: var(--border);
  color: var(--text);
}

/* ===== Numbers section (bottom) ===== */
#numbers-section {
  flex-shrink: 0;
  max-height: 42vh;
  overflow-y: auto;
  background: var(--bg);
  display: flex;
  flex-direction: column;
}

/* Záložky skupin */
#group-tabs {
  display: flex;
  gap: 0;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
#group-tabs::-webkit-scrollbar { display: none; }

.group-tab {
  flex: 1;
  min-width: 52px;
  height: 40px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.group-tab:hover { color: var(--text); }
.group-tab.tab-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

#numbers-grid {
  padding: 6px 12px 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-start;
}

/* Záhlaví skupiny – roztahuje se přes celý řádek */
.group-header {
  width: 100%;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  padding: 8px 0 2px;
  margin-top: 2px;
  border-bottom: 1px solid var(--border);
}
.group-header:first-child { padding-top: 0; margin-top: 0; }
.group-header-custom { color: var(--text-muted); }

/* Řádek pro přidání vlastního čísla */
#custom-number-row {
  display: flex;
  gap: 8px;
  padding: 8px 12px 10px;
  border-top: 1px solid var(--border);
  background: var(--bg2);
  flex-shrink: 0;
}

#custom-num-input {
  flex: 1;
  min-width: 0;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 1.1rem;
  padding: 0 14px;
  height: 52px;
  outline: none;
  transition: border-color 0.15s;
  -webkit-appearance: none;
}
#custom-num-input::placeholder { color: var(--text-muted); }
#custom-num-input:focus { border-color: var(--accent); }
#custom-num-input.input-error { border-color: var(--red); background: #2a0d0d; }
#custom-num-input:disabled { opacity: 0.4; }

#custom-num-btn {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  height: 52px;
  padding: 0 18px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, transform 0.1s;
}
#custom-num-btn:active { transform: scale(0.95); }
#custom-num-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-number {
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1.1rem;
  font-weight: 600;
  min-width: 62px;
  height: 52px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}
.btn-number:hover {
  background: #2d333b;
  border-color: var(--accent);
}
.btn-number:active {
  transform: scale(0.93);
}
.btn-number:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ===== Phase-based visibility ===== */

/* Running / Finished: skrýt seznam čísel a slider */
.phase-running #numbers-section,
.phase-finished #numbers-section {
  display: none;
}

.phase-running #lock-row,
.phase-finished #lock-row {
  display: none;
}

/* Heat section expanduje když není seznam čísel */
.phase-running #heat-section,
.phase-finished #heat-section {
  flex: 1 1 0;
}

/* START: jen v SETUP a LOCKED */
#start-btn { display: none; }
.phase-setup #start-btn,
.phase-locked #start-btn { display: flex; align-items: center; justify-content: center; }

/* Save CSV button */
.btn-save-csv {
  flex: 1;
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  min-height: 52px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}
.btn-save-csv:hover { background: #2d333b; border-color: var(--green); color: var(--green); }
.btn-save-csv:active { transform: scale(0.97); }

/* Uložit CSV: jen ve FINISHED */
#save-csv-btn { display: none; }
.phase-finished #save-csv-btn { display: flex; align-items: center; justify-content: center; }
.phase-finished.edit-mode #save-csv-btn { display: none; }

/* Upravit pořadí: jen ve FINISHED, mimo edit-mode */
#edit-order-btn { display: none; }
.phase-finished #edit-order-btn { display: flex; align-items: center; justify-content: center; }
.phase-finished.edit-mode #edit-order-btn { display: none; }

/* Hotovo: jen ve FINISHED edit-mode */
#done-edit-btn { display: none; }
.phase-finished.edit-mode #done-edit-btn { display: flex; align-items: center; justify-content: center; }

/* ===== Scrollbar styling ===== */
::-webkit-scrollbar {
  width: 5px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 10px;
}

/* ===== Responsive – wider screens ===== */
@media (min-width: 600px) {
  #numbers-grid {
    gap: 10px;
  }
  .btn-number {
    min-width: 72px;
  }
  .racer-num {
    min-width: 68px;
  }
}