/* Triathlon Calculator — modern, sporty UI */

:root {
  --bg: #f0f4f8;
  --surface: #ffffff;
  --text: #1a2332;
  --text-muted: #5a6b7d;
  --accent: #0d9488;
  --accent-hover: #0f766e;
  --border: #e2e8f0;
  --shadow: rgba(13, 148, 136, 0.08);
  --slider-track: #cbd5e1;
  --slider-thumb: #0d9488;
  --error: #dc2626;
  --font-sans: "Outfit", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #1e293b;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #2dd4bf;
  --accent-hover: #5eead4;
  --border: #334155;
  --shadow: rgba(0, 0, 0, 0.3);
  --slider-track: #475569;
  --slider-thumb: #2dd4bf;
  --error: #f87171;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  margin-bottom: 2rem;
}

.header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  white-space: pre-line;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-toggle select,
.unit-toggle select {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  height: 2.5rem;
  padding: 0 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  box-sizing: border-box;
}

.lang-toggle select {
  min-width: 8rem;
}

.unit-toggle select {
  min-width: 6rem;
}

/* Main menu — sport selection (distinct from header parameters) */
.sport-menu {
  margin-bottom: 1.75rem;
}

.sport-menu-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  max-width: 100%;
}

@media (max-width: 480px) {
  .sport-menu-inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

.sport-btn {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.85rem 1rem;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
  box-shadow: 0 1px 2px var(--shadow);
}

.sport-btn:hover {
  background: var(--bg);
  border-color: var(--accent);
}

.sport-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 2px 6px var(--shadow);
}

/* Sport-specific visibility: hide elements that don't match current sport */
.sport-triathlon .field[data-sport]:not([data-sport~="triathlon"]),
.sport-triathlon .pace-block[data-sport]:not([data-sport~="triathlon"]),
.sport-triathlon .result-row[data-sport]:not([data-sport~="triathlon"]) {
  display: none !important;
}

.sport-running .field[data-sport]:not([data-sport~="running"]),
.sport-running .pace-block[data-sport]:not([data-sport~="running"]),
.sport-running .result-row[data-sport]:not([data-sport~="running"]) {
  display: none !important;
}

.sport-duathlon .field[data-sport]:not([data-sport~="duathlon"]),
.sport-duathlon .pace-block[data-sport]:not([data-sport~="duathlon"]),
.sport-duathlon .result-row[data-sport]:not([data-sport~="duathlon"]) {
  display: none !important;
}

.sport-swimrun .field[data-sport]:not([data-sport~="swimrun"]),
.sport-swimrun .pace-block[data-sport]:not([data-sport~="swimrun"]),
.sport-swimrun .result-row[data-sport]:not([data-sport~="swimrun"]) {
  display: none !important;
}

.info-btn,
.theme-btn {
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 600;
}

.info-btn:hover,
.theme-btn:hover {
  background: var(--bg);
  border-color: var(--accent);
}

.info-btn svg.info-icon {
  width: 1.15rem;
  height: 1.15rem;
}

.theme-btn .theme-icon {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-btn .theme-icon svg {
  width: 1.15rem;
  height: 1.15rem;
}

.theme-btn .sun {
  opacity: 0;
}

.theme-btn .moon {
  opacity: 1;
}

[data-theme="dark"] .theme-btn .sun {
  opacity: 1;
}

[data-theme="dark"] .theme-btn .moon {
  opacity: 0;
}

/* Cards */
.card {
  background: var(--surface);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  border: 1px solid var(--border);
  box-shadow: 0 1px 3px var(--shadow);
}

.card h2 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Presets */
.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.preset-btn {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.preset-btn:hover {
  background: var(--bg);
  border-color: var(--accent);
}

.preset-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* Distance inputs */
.distance-inputs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.field input {
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  width: 100%;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--shadow);
}

.field input.error {
  border-color: var(--border);
  border-bottom: 2px solid var(--error);
  color: var(--text);
}
.field input.error:focus {
  border-color: var(--border);
  border-bottom: 2px solid var(--error);
}

.field .unit-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 0.25rem;
}

.distance-inputs .field {
  flex-direction: row;
  align-items: baseline;
}

.distance-inputs .field input {
  flex: 1;
  min-width: 0;
}

.distance-inputs .field .unit-label {
  margin-left: 0.35rem;
  min-width: 1.8rem;
}

/* Pace grid */
.pace-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.25rem;
}

.pace-block {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.pace-block label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.pace-input-row {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.step-btn {
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-btn:hover {
  background: var(--bg);
  border-color: var(--accent);
  color: var(--accent);
}

.step-btn:active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.pace-input-row input {
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 0.45rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  width: 5.5rem;
  min-width: 0;
}

.pace-input-row input:focus {
  outline: none;
  border-color: var(--accent);
}

.pace-input-row input.error {
  border-color: var(--border);
  border-bottom: 2px solid var(--error);
  color: var(--text);
}
.pace-input-row input.error:focus {
  border-color: var(--border);
  border-bottom: 2px solid var(--error);
}

.pace-block .unit-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.pace-alt {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Sliders */
.slider {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--slider-track);
  border-radius: 3px;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--slider-thumb);
  cursor: pointer;
  border: 2px solid var(--surface);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--slider-thumb);
  cursor: pointer;
  border: 2px solid var(--surface);
}

/* Results */
.results-grid {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.95rem;
}

.result-row span {
  color: var(--text-muted);
  font-weight: 500;
}

.result-row output {
  font-family: var(--font-mono);
  font-weight: 500;
}

.total-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 1.1rem;
}

.total-row span {
  font-weight: 600;
  color: var(--text);
}

.total-time {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent);
}

.results-card .error-msg {
  color: var(--error);
  font-size: 0.9rem;
}

/* Finish estimate */
.is-hidden {
  display: none !important;
}

.finish-estimate {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.estimate-grid {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.estimate-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.95rem;
}

.estimate-row .estimate-label {
  color: var(--text-muted);
  font-weight: 500;
  min-width: 4rem;
}

.estimate-row .estimate-time {
  font-family: var(--font-mono);
  font-weight: 500;
}

.estimate-row .estimate-pct {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

/* Footer */
.footer {
  margin-top: auto;
  padding-top: 2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer p {
  margin: 0;
}

/* Responsive */
@media (max-width: 520px) {
  .distance-inputs {
    grid-template-columns: 1fr;
  }

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