:root {
  --bg      : #FAFAFA;
  --card    : #FFFFFF;
  --text    : #111111;
  --text-s  : #999999;
  --border  : #EAEAEA;
  --surface : #F5F5F5;
  --nav-bg  : rgba(250, 250, 250, 0.92);
}

body.dark {
  --bg      : #0A0A0B;
  --card    : #141416;
  --text    : #EAEAEA;
  --text-s  : #666666;
  --border  : #222222;
  --surface : #1A1A1E;
  --nav-bg  : rgba(10, 10, 11, 0.92);
}

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

body {
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

/* ── Animations ────────────────────────────────── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Navbar ─────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 24px;
}

/* ── Logo ─────────────────────────────────────── */
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-text {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.5px;
  color: var(--text);
}

.flag-strip {
  display: flex;
  width: 24px;
  height: 3px;
  border-radius: 2px;
  overflow: hidden;
}
.flag-strip .f-orange { flex: 1; background: #FF8C00; }
.flag-strip .f-white  { flex: 1; background: #FFFFFF; }
.flag-strip .f-green  { flex: 1; background: #009E49; }

/* ── Tab Switcher ─────────────────────────────── */
.tab-switcher {
  display: flex;
  background: var(--surface);
  border-radius: 10px;
  padding: 3px;
}

.tab-btn {
  padding: 6px 16px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  background: transparent;
  color: var(--text-s);
  font-size: 12px;
  font-weight: 400;
  font-family: 'DM Sans', sans-serif;
  transition: all 0.2s ease;
}
.tab-btn.active {
  background: var(--card);
  color: var(--text);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* ── Dark Toggle ──────────────────────────────── */
.dark-toggle {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-s);
  transition: all 0.2s ease;
}
.dark-toggle:hover {
  border-color: #FF8C00;
  color: #FF8C00;
}

/* ── Main & Tabs ──────────────────────────────── */
main {
  max-width: 600px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.tab-pane {
  display: none;
}
.tab-pane.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
}

/* ── Circle Display ───────────────────────────── */
.circle-display {
  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto;
}

.circle-svg {
  display: block;
}

.circle-track {
  fill: none;
  stroke: var(--border);
  stroke-width: 4;
}

.circle-arc {
  fill: none;
  stroke-width: 5;
  stroke-linecap: round;
  opacity: 0;
  transition: stroke-dashoffset 0.1s linear;
}

.chrono-arc {
  stroke: #FF8C00;
}

.timer-arc {
  stroke: #009E49;
  transition: stroke-dashoffset 0.1s linear, stroke 0.3s ease;
}

.circle-center {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

/* ── Time Display ─────────────────────────────── */
.time-display {
  font-size: 56px;
  font-weight: 200;
  letter-spacing: -2px;
  font-family: 'DM Mono', monospace;
  color: var(--text);
  transition: all 0.3s ease;
}
.time-display.done {
  font-size: 48px;
  color: #E53E3E;
  animation: pulse 1s infinite;
}

.timer-label-text {
  font-size: 12px;
  color: var(--text-s);
  margin-top: 4px;
  font-family: 'DM Sans', sans-serif;
}
.timer-label-text.done-text {
  font-size: 14px;
  color: #E53E3E;
  font-weight: 500;
}

/* ── Action Buttons ───────────────────────────── */
.btn-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.action-btn {
  padding: 14px 32px;
  border-radius: 40px;
  border: none;
  cursor: pointer;
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  transition: all 0.2s ease;
  transform: scale(1);
}
.action-btn.primary {
  background: linear-gradient(135deg, #FF8C00, #FFa040);
  color: #FFFFFF;
  box-shadow: 0 4px 20px rgba(255, 140, 0, 0.3);
}
.action-btn.danger {
  background: rgba(229, 62, 62, 0.1);
  color: #E53E3E;
}
.action-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

/* ── Lap List ─────────────────────────────────── */
.lap-list {
  width: 100%;
  max-width: 400px;
}

.lap-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
}

.lap-label {
  font-size: 12px;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.lap-count {
  font-size: 12px;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
}

.lap-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.lap-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  animation: slideIn 0.3s ease;
}
.lap-item.best  { border-color: rgba(0, 158, 73, 0.25); }
.lap-item.worst { border-color: rgba(229, 62, 62, 0.2); }

.lap-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lap-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--border);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
}
.lap-item.best  .lap-num { background: rgba(0, 158, 73, 0.12); color: #009E49; }
.lap-item.worst .lap-num { background: rgba(229, 62, 62, 0.1);  color: #E53E3E; }

.lap-time {
  font-size: 14px;
  font-family: 'DM Mono', monospace;
  color: var(--text);
}

.lap-diff {
  font-size: 12px;
  font-family: 'DM Mono', monospace;
  color: var(--text-s);
}
.lap-item.best  .lap-diff { color: #009E49; }
.lap-item.worst .lap-diff { color: #E53E3E; }

/* ── Timer Input ──────────────────────────────── */
.timer-input-row {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 8px;
}

.spinner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.spin-label {
  font-size: 10px;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
  display: block;
  margin-bottom: 2px;
}

.spin-btn {
  width: 48px;
  height: 28px;
  border-radius: 8px;
  border: none;
  background: var(--surface);
  cursor: pointer;
  font-size: 14px;
  color: var(--text-s);
  transition: all 0.2s ease;
}
.spin-btn:active {
  transform: scale(0.9);
}

.spin-val {
  font-size: 36px;
  font-weight: 200;
  font-family: 'DM Mono', monospace;
  color: var(--text);
  width: 60px;
  text-align: center;
  display: block;
  line-height: 1.2;
}

/* ── Preset Buttons ───────────────────────────── */
.preset-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.preset-btn {
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-s);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  transition: all 0.2s ease;
}
.preset-btn.active-preset {
  background: rgba(0, 158, 73, 0.08);
  color: #009E49;
  border-color: rgba(0, 158, 73, 0.2);
}

/* ── About Tab ────────────────────────────────── */
.about-wrapper {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  background: var(--card);
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 32px;
}

.about-flag {
  display: flex;
  width: 48px;
  height: 30px;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}
.about-flag .f-orange { flex: 1; background: #FF8C00; }
.about-flag .f-white  { flex: 1; background: #FFFFFF; }
.about-flag .f-green  { flex: 1; background: #009E49; }

.about-title {
  font-size: 22px;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  color: var(--text);
  margin-bottom: 12px;
}

.about-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
  margin-bottom: 16px;
}
.about-text:last-child { margin-bottom: 0; }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.about-team-card,
.about-stack-card {
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 20px;
}

.card-section-label {
  font-size: 11px;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.team-member {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.team-member:last-child { margin-bottom: 0; }

.member-name {
  font-size: 13px;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  color: var(--text);
  margin: 0;
}

.member-role {
  font-size: 10px;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
  margin: 0;
}

.gradient-avatar {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, #FF8C00, #009E49);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  flex-shrink: 0;
}

.stack-item {
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--surface);
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 500;
  font-family: 'DM Sans', sans-serif;
  color: var(--text);
}
.stack-item:last-of-type { margin-bottom: 0; }

.stack-note {
  font-size: 11px;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
  font-style: italic;
  margin-top: 10px;
}

.about-footer-card {
  text-align: center;
  padding: 16px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
}

.hl-orange { color: #FF8C00; font-weight: 600; }
.hl-green  { color: #009E49; font-weight: 600; }

/* ── Footer ───────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  text-align: center;
  font-size: 11px;
  color: var(--text-s);
  font-family: 'DM Sans', sans-serif;
}

/* ── Utility ──────────────────────────────────── */
.hidden { display: none !important; }

/* ── Nav right (dark toggle + hamburger) ─────── */
.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Hamburger button ─────────────────────────── */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: border-color 0.2s ease;
}
.menu-toggle:hover {
  border-color: #FF8C00;
}
.menu-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--text-s);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease, width 0.25s ease;
  transform-origin: center;
}

/* Hamburger → X */
.menu-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ── Mobile menu panel (tab-switcher en overlay) */
@keyframes menuDrop {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ≤ 540 px ──────────────────────── */
@media (max-width: 540px) {

  /* Nav inner */
  .nav-inner {
    padding: 0 16px;
    position: relative;
  }

  /* Cacher le tab-switcher dans la barre */
  .tab-switcher {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 8px 16px 12px;
    gap: 4px;
    z-index: 99;
    animation: menuDrop 0.2s ease;
  }

  /* Ouvert */
  .tab-switcher.open {
    display: flex;
  }

  /* Boutons dans le menu mobile */
  .tab-switcher .tab-btn {
    width: 100%;
    text-align: left;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
  }
  .tab-switcher .tab-btn.active {
    background: var(--card);
    font-weight: 600;
  }

  /* Montrer le hamburger */
  .menu-toggle {
    display: flex;
  }

  /* Ajustements main */
  main {
    padding: 32px 16px 64px;
  }

  /* Circle + time légèrement réduits */
  .circle-display {
    width: 260px;
    height: 260px;
  }
  .circle-svg {
    width: 260px;
    height: 260px;
  }
  .time-display {
    font-size: 44px;
  }
  .time-display.done {
    font-size: 38px;
  }

  /* Spinners plus serrés */
  .timer-input-row {
    gap: 10px;
  }
  .spin-val {
    font-size: 28px;
    width: 48px;
  }
  .spin-btn {
    width: 40px;
  }

  /* Presets en scroll horizontal */
  .preset-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }
  .preset-btn {
    flex-shrink: 0;
  }

  /* About grid en colonne */
  .about-grid {
    grid-template-columns: 1fr;
  }

  /* Lap list pleine largeur */
  .lap-list {
    max-width: 100%;
  }
}