/* ==========================================================================
   GYMSYNC — GLOBAL STYLES
   Phase 1: tokens, reset, typography, layout shell, navigation, animations
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Surfaces */
  --color-bg: #090909;
  --color-bg-elevated: #0f0f0f;
  --color-card: rgba(255, 255, 255, 0.05);
  --color-card-hover: rgba(255, 255, 255, 0.08);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.14);

  /* Text */
  --color-text: #f5f5f5;
  --color-text-secondary: #a0a0a0;
  --color-text-tertiary: #6b6b6b;

  /* Brand */
  --color-primary: #059669;
  --color-primary-strong: #10b981;
  --color-primary-glow: rgba(16, 185, 129, 0.35);
  --color-danger: #e5484d;
  --color-warning: #f5a623;
  --color-credits-accent: #a931ff;

  /* Elevation / glass */
  --blur-glass: blur(20px);
  --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.28);

  /* Radii */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  /* Typography */
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;

  /* Motion */
  --ease-standard: cubic-bezier(0.2, 0.8, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 280ms;
  --duration-slow: 450ms;

  /* Layout */
  --nav-height-mobile: 76px;
  --sidebar-width: 240px;
  --content-max-width: 720px;
}

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

html {
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior-y: contain; /* stops the whole page rubber-banding on iOS/Android */
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  touch-action: manipulation; /* kills the old 300ms tap delay + double-tap zoom */
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
  touch-action: manipulation;
}

ul {
  list-style: none;
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Visible keyboard focus, always */
:focus-visible {
  outline: 2px solid var(--color-primary-strong);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---------- Typography ---------- */
h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2rem);
}

h2 {
  font-size: 1.25rem;
}

p {
  color: var(--color-text-secondary);
}

/* Numerical data (stats, weights, timers) reads best tabular + slightly heavier */
.stat-number {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ---------- First Launch / Onboarding ---------- */
.onboarding[hidden] {
  display: none;
}

.onboarding {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background: radial-gradient(
    circle at 50% 20%,
    rgba(16, 185, 129, 0.16),
    transparent 60%
  ),
  var(--color-bg);
}

.onboarding__card {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7) var(--space-5);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  box-shadow: var(--shadow-soft);
}

.onboarding__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  color: var(--color-primary-strong);
  background: var(--color-primary-glow);
  margin-bottom: var(--space-2);
}

.onboarding__card p {
  margin-top: calc(var(--space-1) * -1);
  margin-bottom: var(--space-2);
}

.onboarding__form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.onboarding__label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap; /* visually hidden but still read by screen readers */
}

.onboarding__input {
  width: 100%;
  padding: 14px var(--space-4);
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  text-align: center;
  transition: border-color var(--duration-base) var(--ease-standard),
    background var(--duration-base) var(--ease-standard);
}

.onboarding__input::placeholder {
  color: var(--color-text-tertiary);
}

.onboarding__input:focus {
  outline: none;
  border-color: var(--color-primary-strong);
  background: rgba(255, 255, 255, 0.06);
}

.onboarding__button {
  width: 100%;
  padding: 14px var(--space-4);
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.3);
  transition: background var(--duration-base) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-base) var(--ease-standard),
    opacity var(--duration-base) var(--ease-standard);
}

.onboarding__button:not(:disabled):hover {
  background: var(--color-primary-strong);
}

.onboarding__button:not(:disabled):active {
  transform: scale(0.97);
}

.onboarding__button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
}

/* Exit transition: fades + lifts away once a name has been submitted */
.onboarding.is-leaving {
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-slow) var(--ease-standard);
}

.onboarding.is-leaving .onboarding__card {
  transform: scale(0.96);
  transition: transform var(--duration-slow) var(--ease-standard);
}

/* ---------- Workout Summary / Congratulations ---------- */
.summary-overlay[hidden] {
  display: none;
}

.summary-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background: radial-gradient(
    circle at 50% 20%,
    rgba(16, 185, 129, 0.18),
    transparent 60%
  ),
  var(--color-bg);
}

.summary-card {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-2);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7) var(--space-5);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  box-shadow: var(--shadow-soft);
}

.summary-card__icon {
  font-size: 2.25rem;
  margin-bottom: var(--space-1);
}

.summary-card__split {
  color: var(--color-primary-strong);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: var(--space-3);
}

.summary-stats {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  margin: var(--space-2) 0 var(--space-4);
}

.summary-stat {
  padding: var(--space-3) var(--space-2);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.summary-stat__value {
  font-size: 1.1rem;
  color: var(--color-text);
}

.summary-stat__label {
  margin-top: 4px;
  font-size: 0.68rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.summary-card__note {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.summary-card__done {
  width: 100%;
  padding: 14px var(--space-4);
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.3);
  transition: background var(--duration-base) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.summary-card__done:hover {
  background: var(--color-primary-strong);
}

.summary-card__done:active {
  transform: scale(0.97);
}

/* ---------- App Shell ---------- */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

.main {
  flex: 1;
  width: 100%;
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding: var(--space-5) var(--space-4)
    calc(var(--nav-height-mobile) + var(--space-5));
}

/* ---------- Navigation: Mobile bottom tab bar ---------- */
.nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  background: rgba(15, 15, 15, 0.72);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-top: 1px solid var(--color-border);
}

.nav__brand {
  display: none; /* shown only in sidebar layout */
}

.nav__list {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: var(--nav-height-mobile);
  padding: 0 var(--space-2);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.nav__link {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  width: 64px;
  padding: var(--space-2) 0;
  color: var(--color-text-tertiary);
  transition: color var(--duration-base) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.nav__link:active {
  transform: scale(0.92);
}

.nav__link.is-active {
  color: var(--color-primary-strong);
}

.nav__icon svg {
  transition: transform var(--duration-base) var(--ease-standard);
}

.nav__link.is-active .nav__icon svg {
  transform: translateY(-1px);
}

.nav__label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* Signature element: soft glowing pill gliding under the active icon */
.nav__indicator {
  position: absolute;
  z-index: 1;
  top: 6px;
  left: 0;
  width: 64px;
  height: calc(100% - 12px);
  border-radius: var(--radius-md);
  background: var(--color-primary-glow);
  box-shadow: 0 0 24px 2px var(--color-primary-glow);
  opacity: 0; /* hidden until JS has measured + placed it once, avoids wrong-spot flash */
  will-change: transform;
  transition: transform var(--duration-slow) var(--ease-standard),
    opacity var(--duration-base) var(--ease-standard);
  pointer-events: none;
}

.nav__indicator.is-ready {
  opacity: 1;
}

/* ---------- Main content views ---------- */
.view {
  animation: view-enter var(--duration-slow) var(--ease-standard);
}

.placeholder-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-5);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  box-shadow: var(--shadow-card);
}

.placeholder-card h1 {
  margin-bottom: var(--space-2);
}

/* ---------- Home Dashboard ---------- */
.dash-header {
  margin-bottom: var(--space-5);
}

.dash-header__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-1);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.dash-header__dot {
  color: var(--color-text-tertiary);
  font-size: 0.6rem;
}

/* Today's split — the hero card of the dashboard */
.split-card {
  padding: var(--space-6) var(--space-5);
  margin-bottom: var(--space-4);
  text-align: center;
  background: linear-gradient(160deg, var(--color-card), rgba(16, 185, 129, 0.08));
}

.split-card__label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

.split-card__name {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 1.8rem + 2vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-primary-strong);
  line-height: 1.1;
}

.split-card__sub {
  margin-top: var(--space-1);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* Rest day gets a calmer, muted treatment instead of the workout accent */
.split-card.is-rest {
  background: var(--color-card);
}

.split-card.is-rest .split-card__name {
  color: var(--color-text-secondary);
}

/* Quick stats */
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.stat-card {
  padding: var(--space-4);
  text-align: center;
}

.stat-card--wide {
  grid-column: 1 / -1;
}

.stat-card__icon {
  font-size: 1.3rem;
  display: block;
  margin-bottom: var(--space-2);
}

.stat-card__value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  word-break: break-word;
}

.stat-card__label {
  margin-top: var(--space-1);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-card__value.is-updated {
  animation: value-pulse 420ms var(--ease-standard);
}

@keyframes value-pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.12); color: var(--color-primary-strong); }
  100% { transform: scale(1); }
}

/* Motivational quote */
.quote-card {
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  border-left: 3px solid var(--color-primary-strong);
  border-radius: var(--radius-md);
}

.quote-card__text {
  font-style: italic;
  color: var(--color-text);
  line-height: 1.5;
}

.quote-card__author {
  margin-top: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
}

/* Primary CTA */
.start-workout-btn {
  width: 100%;
  padding: 18px var(--space-5);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #ffffff;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.35);
  transition: background var(--duration-base) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-base) var(--ease-standard);
}

.start-workout-btn:hover {
  background: var(--color-primary-strong);
}

.start-workout-btn:active {
  transform: scale(0.98);
}

.start-workout-btn.is-rest {
  background: var(--color-card);
  color: var(--color-text-secondary);
  box-shadow: none;
  border: 1px solid var(--color-border-strong);
}

.start-workout-btn.is-rest:hover {
  background: var(--color-card-hover);
}

/* ---------- Workout Screen ---------- */
.rest-state {
  text-align: center;
  padding: var(--space-7) var(--space-5);
}

.rest-state__icon {
  font-size: 2rem;
  display: block;
  margin-bottom: var(--space-3);
}

.rest-state p {
  margin-top: var(--space-1);
}

.workout-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.workout-header__label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary-strong);
  margin-bottom: var(--space-1);
}

.workout-timer {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  flex-shrink: 0;
}

.workout-timer__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary-strong);
  box-shadow: 0 0 8px 1px var(--color-primary-glow);
  animation: pulse-dot 2s var(--ease-standard) infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.workout-timer__value {
  font-size: 0.95rem;
  color: var(--color-text);
}

/* Progress bar */
.progress-track {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
  margin-bottom: var(--space-2);
}

.progress-track__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-strong));
  border-radius: var(--radius-pill);
  transition: width var(--duration-slow) var(--ease-standard);
}

.progress-label {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-5);
}

/* Exercise list */
.exercise-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.exercise-card {
  padding: var(--space-4);
  transition: opacity var(--duration-base) var(--ease-standard);
}

.exercise-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.exercise-card__name {
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--duration-base) var(--ease-standard),
    text-decoration-color var(--duration-base) var(--ease-standard);
}

.exercise-card__target {
  margin-top: 2px;
  font-size: 0.82rem;
  color: var(--color-text-tertiary);
}

.exercise-card__inputs {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.exercise-card__inputs label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.exercise-card__inputs input {
  width: 100%;
  padding: 10px var(--space-3);
  font-size: 1rem; /* iOS Safari zooms the page on focus if an input is under 16px */
  font-family: var(--font-body);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  transition: border-color var(--duration-base) var(--ease-standard);
}

.exercise-card__inputs input::placeholder {
  color: var(--color-text-tertiary);
}

.exercise-card__inputs input:focus {
  outline: none;
  border-color: var(--color-primary-strong);
}

/* Custom checkbox: real input for a11y, visually hidden; a styled label stands in */
.exercise-card__checkbox {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.exercise-card__check-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1.5px solid var(--color-border-strong);
  color: transparent;
  cursor: pointer;
  transition: background var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard),
    color var(--duration-base) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.exercise-card__check-visual:active {
  transform: scale(0.9);
}

.exercise-card__checkbox:checked + .exercise-card__check-visual {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}

.exercise-card__checkbox:focus-visible + .exercise-card__check-visual {
  outline: 2px solid var(--color-primary-strong);
  outline-offset: 2px;
}

.exercise-card__check-visual.is-popping {
  animation: check-pop 320ms var(--ease-standard);
}

@keyframes check-pop {
  0% { transform: scale(1); }
  45% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

/* Completed state: dims the card and strikes the exercise name */
.exercise-card:has(.exercise-card__checkbox:checked) {
  opacity: 0.6;
}

.exercise-card:has(.exercise-card__checkbox:checked) .exercise-card__name {
  text-decoration: line-through;
  text-decoration-color: var(--color-text-tertiary);
}

/* Finish Workout */
.finish-workout-btn {
  width: 100%;
  padding: 18px var(--space-5);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #ffffff;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.35);
  transition: background var(--duration-base) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard),
    opacity var(--duration-base) var(--ease-standard);
}

.finish-workout-btn:hover {
  background: var(--color-primary-strong);
}

.finish-workout-btn:active {
  transform: scale(0.98);
}

.finish-workout-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.finish-banner {
  margin-top: var(--space-4);
  padding: var(--space-4);
  text-align: center;
  background: var(--color-primary-glow);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
}

.finish-banner p {
  color: var(--color-text);
  font-weight: 600;
}

/* ---------- History ---------- */
.history-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.history-empty {
  padding: var(--space-6) var(--space-5);
  text-align: center;
  color: var(--color-text-tertiary);
}

.history-card {
  padding: 0;
  overflow: hidden;
}

.history-card__summary {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4);
  text-align: left;
}

.history-card__left {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  min-width: 0;
}

.history-card__split {
  font-weight: 700;
  color: var(--color-primary-strong);
  letter-spacing: 0.02em;
}

.history-card__date {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
  white-space: nowrap;
}

.history-card__right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.history-card__meta {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.history-card__chevron {
  display: inline-block;
  color: var(--color-text-tertiary);
  transition: transform var(--duration-base) var(--ease-standard);
}

.history-card__summary[aria-expanded='true'] .history-card__chevron {
  transform: rotate(180deg);
}

.history-card__details {
  padding: 0 var(--space-4) var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.history-card__details[hidden] {
  display: none;
}

.history-card__exercise {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-3);
  font-size: 0.9rem;
}

.history-card__exercise-name {
  color: var(--color-text);
}

.history-card__exercise-status {
  margin-left: var(--space-1);
  color: var(--color-primary-strong);
}

.history-card__exercise-meta {
  color: var(--color-text-tertiary);
  font-size: 0.82rem;
  text-align: right;
  white-space: nowrap;
}

/* ---------- Profile ---------- */
.profile-card,
.danger-card,
.credits-card {
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}

.profile-card__label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
}

.profile-name-form {
  display: flex;
  gap: var(--space-2);
}

.profile-name-form__input {
  flex: 1;
  min-width: 0;
  padding: 12px var(--space-3);
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  transition: border-color var(--duration-base) var(--ease-standard);
}

.profile-name-form__input:focus {
  outline: none;
  border-color: var(--color-primary-strong);
}

.profile-name-form__save {
  flex-shrink: 0;
  padding: 12px var(--space-4);
  font-weight: 600;
  color: #ffffff;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  transition: background var(--duration-base) var(--ease-standard),
    opacity var(--duration-base) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.profile-name-form__save:hover:not(:disabled) {
  background: var(--color-primary-strong);
}

.profile-name-form__save:active:not(:disabled) {
  transform: scale(0.96);
}

.profile-name-form__save:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.profile-card__saved-note {
  margin-top: var(--space-2);
  font-size: 0.82rem;
  color: var(--color-primary-strong);
}

.profile-card__saved-note[hidden] {
  display: none;
}

/* Danger zone: same card shape, tinted red border instead of a new component */
.danger-card {
  border-color: rgba(229, 72, 77, 0.25);
}

.danger-card__title {
  font-weight: 600;
  color: var(--color-danger);
  margin-bottom: var(--space-1);
}

.danger-card__desc {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.danger-card__button {
  width: 100%;
  padding: 12px var(--space-4);
  font-weight: 600;
  color: var(--color-danger);
  background: rgba(229, 72, 77, 0.1);
  border: 1px solid rgba(229, 72, 77, 0.35);
  border-radius: var(--radius-md);
  transition: background var(--duration-base) var(--ease-standard);
}

.danger-card__button:hover {
  background: rgba(229, 72, 77, 0.18);
}

/* ---------- Profile credits ---------- */
.credits {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.credits p {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
}

.credits__link {
  color: var(--color-credits-accent);
  transition: opacity var(--duration-fast) var(--ease-standard);
}

.credits__link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.credits__highlight {
  color: var(--color-credits-accent);
  font-weight: 600;
}

/* ---------- Shared card / glass utility (used by later phases) ---------- */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: background var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard),
    transform var(--duration-base) var(--ease-standard);
}

.card:hover {
  background: var(--color-card-hover);
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

/* ---------- Animations ---------- */
@keyframes view-enter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fade-in var(--duration-slow) var(--ease-standard) both;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ==========================================================================
   RESPONSIVE — DESKTOP SIDEBAR LAYOUT
   Same nav markup pivots from a bottom tab bar to a left sidebar.
   ========================================================================== */
@media (min-width: 900px) {
  .app {
    flex-direction: row;
  }

  .nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: auto;
    width: var(--sidebar-width);
    height: 100vh;
    border-top: none;
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    padding: var(--space-5) var(--space-4);
  }

  .nav__brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-text);
    padding: 0 var(--space-2);
    margin-bottom: var(--space-6);
  }

  .nav__logo {
    display: flex;
    color: var(--color-primary-strong);
  }

  .nav__brand-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
  }

  .nav__list {
    position: relative;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    height: auto;
    gap: var(--space-1);
    padding: 0;
  }

  .nav__item {
    width: 100%;
  }

  .nav__link {
    flex-direction: row;
    justify-content: flex-start;
    width: 100%;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-3);
    border-radius: var(--radius-md);
  }

  .nav__label {
    font-size: 0.9rem;
  }

  .nav__link.is-active .nav__icon svg {
    transform: none;
  }

  /* Indicator becomes a full-width row highlight behind the active link */
  .nav__indicator {
    left: 0;
    top: 0;
    width: 100%;
    height: 46px;
    transform: translateY(0);
    transition: transform var(--duration-slow) var(--ease-standard);
  }

  .main {
    margin-inline: 0;
    margin-left: var(--sidebar-width);
    max-width: none;
    padding: var(--space-7) var(--space-6);
  }

  .main > .view {
    max-width: var(--content-max-width);
    margin-inline: auto;
  }
}