:root {
  --bg: #F8FAFC;
  --card: #FFFFFF;
  --accent: #4F46E5;
  --accent-hover: #4338CA;
  --text: #1E293B;
  --text-secondary: #64748B;
  --border: #E2E8F0;
  --green: #16A34A;
  --green-bg: #DCFCE7;
  --danger: #DC2626;
  --radius-card: 12px;
  --radius-ctrl: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

/* ---------- Layout ---------- */
.app-header {
  background: var(--card);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 20;
}

.app-header .inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
}

.app-header .brand {
  font-weight: 700;
  font-size: 1.05rem;
}

.app-nav {
  display: flex;
  gap: 16px;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 500;
}

.app-nav a {
  color: var(--text-secondary);
  transition: color var(--transition);
}

.app-nav a:hover,
.app-nav a.active {
  color: var(--accent);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 18px 64px;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.card {
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 18px;
}

.card h2 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

/* ---------- Buttons ---------- */
.btn {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-ctrl);
  padding: 12px 18px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition),
    box-shadow var(--transition), opacity var(--transition);
}

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

.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 12px;
}

.btn-ghost:hover {
  color: var(--accent);
}

.btn-small {
  padding: 8px 14px;
  font-size: 0.85rem;
  width: auto;
}

.btn-green {
  background: var(--green);
  color: #fff;
}

/* ---------- Forms ---------- */
label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
}

input[type="email"],
input[type="password"],
input[type="number"],
input[type="text"] {
  width: 100%;
  font-family: inherit;
  font-size: 1rem;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-ctrl);
  background: #fff;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.field {
  margin-bottom: 16px;
}

/* ---------- Login ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 32px 28px;
  width: 100%;
  max-width: 380px;
}

.login-card .logo {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 8px;
}

.login-card h1 {
  text-align: center;
  font-size: 1.35rem;
  margin-bottom: 4px;
}

.login-card p.hint {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 22px;
}

/* ---------- Muscle / material toggles ---------- */
.toggle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}

.toggle-btn {
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-ctrl);
  padding: 12px 14px;
  cursor: pointer;
  transition: all var(--transition);
}

.toggle-btn .emoji {
  font-size: 1.1rem;
}

.toggle-btn:hover {
  border-color: var(--accent);
}

.toggle-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-ctrl);
  cursor: pointer;
  transition: border-color var(--transition);
  font-size: 0.9rem;
}

.check-item:hover {
  border-color: var(--accent);
}

.check-item input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

/* ---------- Slider ---------- */
.slider-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  height: 6px;
}

.slider-row input[type="number"] {
  width: 80px;
  text-align: center;
}

/* ---------- Stars ---------- */
.stars {
  display: flex;
  gap: 6px;
}

.star {
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--border);
  transition: color var(--transition), transform var(--transition);
  user-select: none;
}

.star:hover {
  transform: scale(1.12);
}

.star.active {
  color: #F59E0B;
}

/* ---------- Spinner / overlay ---------- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(248, 250, 252, 0.92);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  z-index: 100;
  text-align: center;
  padding: 20px;
}

.overlay.show {
  display: flex;
}

.spinner {
  width: 52px;
  height: 52px;
  border: 5px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

.overlay p {
  color: var(--text-secondary);
  font-weight: 500;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- Progress bar ---------- */
.progress-track {
  background: var(--border);
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  border-radius: 999px;
  transition: width 0.4s ease;
}

.global-progress {
  position: sticky;
  top: 0;
  background: var(--card);
  padding: 14px 18px;
  box-shadow: var(--shadow);
  z-index: 20;
}

.global-progress .meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 500;
}

/* ---------- Exercise card ---------- */
.exercise {
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 16px;
  margin-bottom: 14px;
  transition: all var(--transition);
}

.exercise.done {
  background: var(--green-bg);
  border-color: var(--green);
}

.exercise-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.exercise-head h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.exercise.done .check-mark {
  color: var(--green);
  font-weight: 700;
  font-size: 1.3rem;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
}

.badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
  color: #fff;
}

.badge.secondary {
  opacity: 0.7;
}

.accordion-toggle {
  background: none;
  border: none;
  color: var(--accent);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 0;
}

.accordion-body {
  display: none;
  font-size: 0.88rem;
  color: var(--text-secondary);
  background: var(--bg);
  border-radius: var(--radius-ctrl);
  padding: 12px;
  margin: 8px 0;
}

.accordion-body.open {
  display: block;
}

table.sets {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

table.sets th {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  text-align: left;
  padding: 6px 6px;
}

table.sets td {
  padding: 6px 6px;
  border-top: 1px solid var(--border);
  vertical-align: middle;
}

table.sets input {
  width: 100%;
  min-width: 60px;
  padding: 8px;
  font-size: 0.95rem;
}

tr.set-done td {
  opacity: 0.55;
}

.set-validate {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-ctrl);
  padding: 8px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition);
}

.set-validate:hover {
  background: var(--accent-hover);
}

.set-validate:disabled {
  background: var(--green);
  cursor: default;
}

/* ---------- Rest timer ---------- */
.rest-timer {
  display: none;
  margin-top: 12px;
  padding: 14px;
  background: var(--bg);
  border-radius: var(--radius-ctrl);
  text-align: center;
}

.rest-timer.show {
  display: block;
}

.rest-timer .count {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.rest-timer .skip {
  margin-top: 10px;
  font-size: 0.8rem;
}

/* ---------- History ---------- */
.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 10px;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.history-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.history-item .date {
  font-weight: 600;
}

.history-item .muscles {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.history-item .dur {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

.empty {
  text-align: center;
  color: var(--text-secondary);
  padding: 30px 10px;
}

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-ctrl);
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition);
  z-index: 200;
  max-width: 90vw;
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.error {
  background: var(--danger);
}

.form-error {
  color: var(--danger);
  font-size: 0.88rem;
  margin-bottom: 14px;
  min-height: 1.1em;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 30px 16px;
  z-index: 150;
  overflow-y: auto;
}

.modal-backdrop.show {
  display: flex;
}

.modal {
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 22px;
  width: 100%;
  max-width: 600px;
}

.modal h2 {
  margin-bottom: 6px;
}

.modal .close {
  float: right;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 1.3rem;
  line-height: 1;
}

canvas {
  max-width: 100%;
}

/* ---------- Mannequin musculaire ---------- */
.hidden {
  display: none !important;
}

.mannequin-hint {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 14px;
}

.view-toggle {
  display: flex;
  gap: 6px;
  background: var(--bg);
  border-radius: var(--radius-ctrl);
  padding: 4px;
  width: fit-content;
  margin: 0 auto 14px;
}

.vt-btn {
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 22px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
}

.vt-btn.active {
  background: var(--accent);
  color: #fff;
}

.mannequin {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}

.body-svg {
  width: 100%;
  max-width: 280px;
  height: auto;
  touch-action: manipulation;
}

.body-svg .body,
.body-svg .body path {
  fill: #E7ECF3;
  stroke: #C6D0DE;
  stroke-width: 2.5;
}

.body-svg .muscle {
  fill: #8A9AB5;
  stroke: #5F708C;
  stroke-width: 1.5;
  cursor: pointer;
  transition: fill var(--transition), filter var(--transition);
}

.body-svg .muscle:hover {
  fill: #A7B4CC;
  filter: drop-shadow(0 0 3px rgba(229, 62, 62, 0.5));
}

.body-svg .muscle.selected {
  fill: #E53E3E;
  stroke: #C53030;
}

.body-svg .muscle.selected:hover {
  fill: #F1564E;
}

.muscle-tooltip {
  position: fixed;
  pointer-events: none;
  background: var(--text);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 9px;
  border-radius: 6px;
  opacity: 0;
  transform: translate(-50%, -135%);
  transition: opacity 0.12s ease;
  z-index: 120;
  white-space: nowrap;
}

.muscle-tooltip.show {
  opacity: 1;
}

.muscle-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  min-height: 26px;
}

.muscle-chips .chip {
  font-size: 0.78rem;
  font-weight: 600;
  background: rgba(229, 62, 62, 0.12);
  color: #E53E3E;
  padding: 4px 10px;
  border-radius: 999px;
}

.muscle-chips .chips-empty {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

@media (max-width: 480px) {
  .toggle-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  h1 {
    font-size: 1.3rem;
  }
}