/* Structure générale — une navigation stable et une seule vue active */
:root { --sidebar-width: 232px; --page-gutter: clamp(24px, 4vw, 58px); }

html { min-width: 320px; }
body { min-height: 100vh; overflow-x: hidden; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--theme-a) 58%, transparent);
  outline-offset: 3px;
}

.app { min-height: 100vh; display: block; }
.app-sidebar {
  position: fixed;
  z-index: 20;
  inset: 0 auto 0 0;
  width: var(--sidebar-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  padding: 27px 18px 20px;
  border: 0;
  border-right: 1px solid var(--theme-line);
  background: color-mix(in srgb, var(--theme-bg-deep) 94%, transparent);
  box-shadow: 12px 0 45px rgba(0,0,0,.14);
  backdrop-filter: blur(18px);
}
.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 7px;
  min-width: 0;
  padding: 4px 10px 25px;
  border-bottom: 1px solid var(--theme-line);
  color: var(--theme-text);
  text-decoration: none;
}
.brand-title { font-size: 18px; line-height: 1.15; letter-spacing: -.55px; }
.brand .brand-title { color: var(--theme-text); }
.brand-title em { color: var(--theme-a); font-style: normal; }
.brand small { color: var(--theme-muted); font: 700 8px "DM Mono", monospace; letter-spacing: 2px; }
.brand::after { display: none !important; }

.primary-navigation { display: grid; align-content: start; gap: 7px; margin-top: 24px; }
.nav-trigger,
.flashcards-trigger,
.university-trigger,
.tracking-trigger,
.settings-trigger {
  position: relative;
  width: 100%;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  padding: 0 13px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: var(--theme-muted);
  font-size: 12px;
  text-align: left;
  cursor: pointer;
  transition: color .18s, background .18s, border-color .18s, transform .18s;
}
.nav-trigger svg,
.flashcards-trigger svg,
.university-trigger svg,
.tracking-trigger svg {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.55;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.primary-navigation .flashcards-trigger > span,
.primary-navigation .university-trigger > span,
.primary-navigation .tracking-trigger > span { display: inline; }
.nav-trigger:hover { color: var(--theme-text); background: color-mix(in srgb, var(--theme-a) 7%, transparent); }
.nav-trigger.active {
  color: var(--theme-text);
  border-color: color-mix(in srgb, var(--theme-a) 40%, var(--theme-line));
  background: color-mix(in srgb, var(--theme-surface-solid) 82%, var(--theme-a));
}
.nav-trigger.active::before {
  content: "";
  position: absolute;
  left: -19px;
  width: 4px;
  height: 25px;
  background: var(--theme-a);
}
.flashcards-trigger b {
  position: static;
  margin-left: auto;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border-radius: 10px;
  background: var(--theme-a);
  color: var(--action-ink);
  font-size: 9px;
}
.sidebar-footer { display: grid; gap: 12px; margin-top: auto; }
.sidebar-rule { display: block; height: 1px; background: var(--theme-line); }
.settings-trigger.active { color: var(--theme-a); }

.app-workspace {
  min-height: 100vh;
  margin-left: var(--sidebar-width);
}
.page-heading {
  width: min(1060px, 100%);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin: 0 auto 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--theme-line);
}
.page-heading h1 { margin: 7px 0 0; color: var(--theme-text); font-size: clamp(34px, 4vw, 52px); line-height: .96; letter-spacing: -2px; }
.page-heading p { max-width: 560px; margin: 12px 0 0; color: var(--theme-muted); font-size: 12px; line-height: 1.65; }

/* Minuteur */
.timer-section {
  min-height: 100vh;
  display: block;
  padding: 42px var(--page-gutter) 54px;
}
.timer-section.page-hidden { display: none; }
.timer-heading .latvian-poster-copy { display: none; }
body[data-theme="latvian-ssr"] .timer-heading .latvian-poster-copy {
  position: static;
  width: auto;
  flex: 0 0 auto;
  display: flex;
  align-items: flex-end;
  color: var(--theme-text);
  opacity: 1;
}
body[data-theme="latvian-ssr"] .timer-heading .latvian-poster-copy span { padding: 4px 7px; }
body[data-theme="latvian-ssr"] .timer-heading .latvian-poster-copy strong { margin-top: 4px; font-size: clamp(30px, 4vw, 51px); line-height: .84; }
body[data-theme="latvian-ssr"] .timer-heading .latvian-poster-copy small { margin-top: 7px; }
.timer-board {
  width: min(860px, 100%);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--theme-line);
  border-radius: 18px;
  background: color-mix(in srgb, var(--theme-surface-solid) 76%, transparent);
  box-shadow: 0 28px 85px rgba(0,0,0,.18);
  backdrop-filter: blur(14px);
}
.timer-stage {
  position: relative;
  width: 100%;
  display: grid;
  grid-template-columns: 145px minmax(300px, 390px);
  align-items: center;
  justify-content: center;
  gap: clamp(25px, 5vw, 58px);
}
.study-categories {
  position: static;
  width: 145px;
  display: grid;
  gap: 9px;
  transform: none;
}
.category-title { margin: 0 0 3px 2px; }
.study-category { height: 44px; padding-inline: 12px; }
.study-category:hover { transform: translateX(3px); }
.timer-wrap { width: min(34vw, 360px); min-width: 300px; margin: 0; }
.controls { margin-top: 27px; }
.hint { margin-top: 18px; }

/* Flashcards et université deviennent de vraies pages dans la zone centrale */
.flashcards-section,
.university-section {
  min-height: 100vh;
  padding: 34px var(--page-gutter) 48px;
}
.flashcards-layout { width: min(1220px, 100%); min-height: calc(100vh - 82px); }
.flashcard-sidebar { width: auto; }
.university-shell { width: min(1120px, 100%); }
.university-header { padding-top: 4px; }
.university-categories { gap: 10px; margin: 22px 0 16px; }
.university-category {
  min-height: 72px;
  grid-template-columns: 38px 1fr auto;
  gap: 12px;
  padding: 13px 15px;
  border-radius: 10px;
}
.university-category-icon { width: 38px; height: 38px; border-radius: 8px; font-size: 18px; }
.university-category small { margin-top: 4px; }

/* Le suivi est désormais une page, pas une fenêtre posée sur le reste */
.tracking-panel {
  position: fixed;
  z-index: 8;
  inset: 0 0 0 var(--sidebar-width);
  width: auto;
  max-height: none;
  overflow-y: auto;
  padding: 42px var(--page-gutter) 52px;
  border: 0;
  border-radius: 0;
  background: color-mix(in srgb, var(--theme-bg) 94%, transparent);
  box-shadow: none;
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.tracking-panel[hidden] { display: none; }
.tracking-panel.open { opacity: 1; transform: none; }
.tracking-panel > * { width: min(1080px, 100%); margin-inline: auto; }
.tracking-header { padding-bottom: 20px; border-bottom: 1px solid var(--theme-line); }
.tracking-header h2 { margin-top: 7px; font-size: clamp(32px, 4vw, 48px); letter-spacing: -1.7px; }
.panel-close {
  min-height: 39px;
  padding: 0 13px;
  border: 1px solid var(--theme-line);
  border-radius: 8px;
  background: var(--theme-surface);
  color: var(--theme-muted);
  font-size: 10px;
}
.tracking-tabs { max-width: 420px; grid-template-columns: repeat(3, 1fr); margin-top: 24px; }
.tracking-category-filter { justify-content: flex-start; }
.tracking-stats { grid-template-columns: repeat(2, minmax(180px, 280px)); justify-content: start; }
.tracking-stats > div { min-height: 96px; display: flex; flex-direction: column; justify-content: center; }
.study-breakdown {
  width: 100%;
  max-width: none;
  margin: 0 0 24px;
  padding: 16px;
  border: 1px solid var(--theme-line);
  background: color-mix(in srgb, var(--theme-surface-solid) 75%, transparent);
}
.breakdown-row { grid-template-columns: 72px minmax(0, 1fr) 72px; gap: 14px; }
.breakdown-track { height: 8px; }
.calendar-heading { margin-top: 30px; }
.calendar-scroll { padding: 16px; border: 1px solid var(--theme-line); background: color-mix(in srgb, var(--theme-surface-solid) 75%, transparent); }
.calendar-grid[data-view="month"] { justify-content: start; }

/* Réglages : un seul tiroir dédié, au-dessus de l'écran actif */
.settings {
  z-index: 40;
  width: min(430px, 100%);
  padding: 34px;
  overflow-y: auto;
  box-shadow: -25px 0 80px rgba(0,0,0,.38);
}
.overlay { z-index: 35; }

body[data-theme="latvian-ssr"] .app-sidebar {
  border-right: 3px solid var(--theme-a);
  background: #111719;
  box-shadow: none;
  backdrop-filter: none;
}
body[data-theme="latvian-ssr"] .nav-trigger,
body[data-theme="latvian-ssr"] .timer-board,
body[data-theme="latvian-ssr"] .calendar-scroll,
body[data-theme="latvian-ssr"] .university-category,
body[data-theme="latvian-ssr"] .revision-day-column,
body[data-theme="latvian-ssr"] .revision-day-column button { border-radius: 0; backdrop-filter: none; box-shadow: none; }
body[data-theme="latvian-ssr"] .nav-trigger.active { border-color: var(--theme-text); background: var(--theme-a); color: var(--theme-text); }
body[data-theme="latvian-ssr"] .nav-trigger.active::before { background: var(--theme-b); }
body[data-theme="latvian-ssr"] .timer-board { background: rgba(12,18,20,.82); }
body[data-theme="latvian-ssr"] .tracking-panel { background: rgba(12,18,20,.94); }

@media (max-width: 1050px) {
  :root { --sidebar-width: 204px; }
  .app-sidebar { padding-inline: 14px; }
  .brand-title { font-size: 16px; }
  .timer-stage { grid-template-columns: 125px minmax(280px, 340px); gap: 28px; }
  .study-categories { width: 125px; }
  .timer-wrap { width: 330px; min-width: 0; }
}

@media (max-width: 820px) {
  :root { --sidebar-width: 0px; --page-gutter: 18px; }
  body { padding-bottom: 72px; }
  .app-sidebar {
    inset: auto 0 0 0;
    width: 100%;
    height: 72px;
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(58px, 1fr);
    gap: 4px;
    padding: 8px 10px max(8px, env(safe-area-inset-bottom));
    border: 0;
    border-top: 1px solid var(--theme-line);
    box-shadow: 0 -14px 42px rgba(0,0,0,.25);
  }
  .brand, .sidebar-rule { display: none; }
  .primary-navigation {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    margin: 0;
  }
  .sidebar-footer { position: static; display: block; margin: 0; }
  .settings-trigger {
    width: 100%;
    height: 56px;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    padding: 0;
    border-color: transparent;
    background: transparent;
    font-size: 9px;
  }
  .settings-trigger span { display: inline; }
  .nav-trigger { height: 56px; flex-direction: column; justify-content: center; gap: 4px; padding: 0 5px; font-size: 9px; }
  .nav-trigger svg { width: 18px; height: 18px; }
  .nav-trigger.active::before { left: 25%; top: -9px; width: 50%; height: 3px; }
  .flashcards-trigger b { position: absolute; top: 3px; right: calc(50% - 23px); min-width: 16px; height: 16px; font-size: 7px; }
  .app-workspace { margin-left: 0; }
  .timer-section, .flashcards-section, .university-section { min-height: calc(100vh - 72px); padding-top: 25px; }
  .page-heading { align-items: flex-start; margin-bottom: 18px; }
  .page-heading p { font-size: 11px; }
  .timer-heading .latvian-poster-copy { display: none !important; }
  .timer-board { padding: 24px 18px 27px; }
  .timer-stage { display: flex; flex-direction: column; gap: 19px; }
  .study-categories { order: -1; width: 100%; display: grid; grid-template-columns: repeat(3, 1fr); }
  .category-title { grid-column: 1 / -1; }
  .study-category { width: 100%; justify-content: center; }
  .study-category:hover { transform: translateY(-1px); }
  .timer-wrap { width: min(78vw, 340px); }
  .tracking-panel { inset: 0 0 72px; padding-top: 26px; }
  .tracking-header h2 { font-size: 34px; }
  .flashcards-layout { min-height: calc(100vh - 132px); }
  body[data-theme="latvian-ssr"] .app-sidebar { border: 0; border-top: 3px solid var(--theme-a); }
}

@media (max-width: 560px) {
  .page-heading h1 { font-size: 37px; }
  .page-heading p { max-width: 92%; }
  .timer-board { border-inline: 0; }
  .timer-wrap { width: min(84vw, 320px); }
  .study-category { padding-inline: 7px; font-size: 10px; }
  .controls { gap: 13px; }
  .primary-control { min-width: 140px; }
  .tracking-tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .tracking-category-filter { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 5px; }
  .tracking-stats { grid-template-columns: 1fr 1fr; }
  .tracking-stats > div { min-width: 0; }
  .panel-close { padding-inline: 10px; font-size: 0; }
  .panel-close::after { content: "←"; font-size: 17px; }
  .settings { padding: 25px 21px 90px; }
}