/* ── Design tokens ─────────────────────────────────────────────────────────── */
:root {
  --bg:          #0f1117;
  --surface:     #1a1d27;
  --surface2:    #22263a;
  --border:      #2e3248;
  --accent:      #6c63ff;
  --danger:      #ff6584;
  --success:     #4caf7d;
  --warning:     #f5a623;
  --cal:         #f59e0b;
  --prot:        #34d399;
  --carb:        #60a5fa;
  --fat:         #fb7185;
  --text:        #e8eaf6;
  --text-muted:  #8b90a8;
  --radius:      12px;
  --radius-sm:   8px;
  --shadow:      0 4px 24px rgba(0, 0, 0, .45);
  --shadow-sm:   0 2px 8px  rgba(0, 0, 0, .3);
  --font:        'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition:  150ms ease;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ────────────────────────────────────────────────────────────── */
h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 1.5rem; letter-spacing: -.02em; }
h2 { font-size: 1.05rem; font-weight: 600; margin-bottom: .75rem; }
h3 { font-size: .95rem; font-weight: 600; }

/* ── Header & Nav ──────────────────────────────────────────────────────────── */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: .75rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.app-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.02em;
  white-space: nowrap;
}
.app-logo span { color: var(--accent); }

.app-nav { display: flex; gap: .25rem; flex-wrap: wrap; }

.nav-btn {
  font-family: var(--font);
  background: none;
  border: none;
  color: var(--text-muted);
  padding: .4rem .85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: .8125rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.nav-btn:hover { background: var(--surface2); color: var(--text); }
.nav-btn.active { background: none; color: var(--text); position: relative; }
.nav-btn.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: .4rem;
  right: .4rem;
  height: 2px;
  background: var(--accent);
  border-radius: 99px;
}
.nav-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Layout ────────────────────────────────────────────────────────────────── */
main { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }

.tab { display: none; }
.tab.active { display: block; }

.tab-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: .75rem;
}
.tab-header h1 { margin-bottom: 0; }

.row { display: flex; gap: 1rem; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 0; }

/* ── Card ──────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

/* ── Stat grid ─────────────────────────────────────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}
.stat-label {
  font-size: .6875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-bottom: .5rem;
}
.stat-value { font-size: 2rem; font-weight: 700; color: var(--accent); line-height: 1.1; }
.stat-value--sm     { font-size: 1rem; line-height: 1.4; }
.stat-value--green  { color: var(--success); }
.stat-value--yellow { color: var(--warning); }
.stat-value--red    { color: var(--danger); }
.stat-value--cal    { color: var(--cal); }
.stat-value--prot   { color: var(--prot); }
.stat-value--carb   { color: var(--carb); }
.stat-value--fat    { color: var(--fat); }

/* ── Macro bars ────────────────────────────────────────────────────────────── */
.macro-targets {
  font-size: .8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.macro-target-badge {
  display: inline-block;
  background: rgba(108,99,255,.18);
  color: var(--accent);
  border-radius: 4px;
  padding: .1rem .45rem;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-right: .25rem;
}
.macro-bars { display: flex; flex-direction: column; gap: .875rem; }
.macro-row  { display: flex; align-items: center; gap: .75rem; font-size: .875rem; }
.macro-row__label { width: 58px; color: var(--text-muted); font-size: .8125rem; }
.macro-row__value { width: 76px; text-align: right; font-weight: 600; font-size: .8125rem; }
.bar-track { flex: 1; background: var(--surface2); border-radius: 99px; height: 6px; overflow: hidden; }
.bar-fill  { height: 100%; border-radius: 99px; width: 0; transition: width .6s cubic-bezier(.4,0,.2,1); }
.bar-fill--cal  { background: var(--cal); }
.bar-fill--prot { background: var(--prot); }
.bar-fill--carb { background: var(--carb); }
.bar-fill--fat  { background: var(--fat); }

/* ── Form controls ─────────────────────────────────────────────────────────── */
.input {
  font-family: var(--font);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .575rem .85rem;
  color: var(--text);
  font-size: .875rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, .15);
}
.input::placeholder { color: var(--text-muted); }
.input:focus-visible { outline: none; }

select.input option { background: var(--surface2); }
textarea.input { resize: vertical; line-height: 1.5; }

.form-row   { display: flex; gap: .5rem; align-items: flex-start; flex-wrap: wrap; }
.form-grid  { display: grid; grid-template-columns: repeat(auto-fit, minmax(175px, 1fr)); gap: .5rem; }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  font-family: var(--font);
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .575rem 1rem;
  color: var(--text);
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn--primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--primary:hover { background: #7b73ff; border-color: #7b73ff; color: #fff; }

.btn--success { background: var(--success); border-color: var(--success); color: #fff; }
.btn--success:hover { background: #5dca92; border-color: #5dca92; color: #fff; }

.btn--danger { color: var(--text-muted); border-color: var(--border); background: none; }
.btn--danger:hover { border-color: var(--danger); color: var(--danger); background: rgba(255, 101, 132, .08); }

.btn--danger-fill { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn--danger-fill:hover { background: #ff7a96; border-color: #ff7a96; color: #fff; }

.btn--sm { padding: .35rem .65rem; font-size: .8rem; }
.btn--icon { padding: .35rem .5rem; }

/* ── Tags ──────────────────────────────────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  padding: .15rem .5rem;
  border-radius: 99px;
  font-size: .6875rem;
  font-weight: 600;
  letter-spacing: .02em;
  margin: .15rem .1rem;
}
.tag--cat    { background: rgba(108, 99, 255, .18); color: var(--accent); }
.tag--muscle { background: rgba(76, 175, 125, .18); color: var(--success); }
.tag--equip  { background: rgba(245, 166, 35, .18);  color: var(--warning); }

/* ── Exercise cards ────────────────────────────────────────────────────────── */
.exercise-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }

.exercise-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  transition: border-color var(--transition);
}
.exercise-card:hover { border-color: var(--border); }
.exercise-card h3 { margin-bottom: .35rem; }
.exercise-card__instructions {
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: .5rem;
  line-height: 1.55;
}

/* ── Workout cards ─────────────────────────────────────────────────────────── */
.workout-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: .75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.workout-card:hover { border-color: var(--accent); background: rgba(108, 99, 255, .04); }
.workout-card__name { font-weight: 600; }
.workout-card__meta { font-size: .8rem; color: var(--text-muted); margin-top: .2rem; }
.workout-card__actions { display: flex; gap: .5rem; align-items: center; }
.workout-card__status { font-size: .8rem; color: var(--text-muted); }
.workout-card__status--active { color: var(--success); font-weight: 600; }

/* ── Active workout set logger ─────────────────────────────────────────────── */
.set-logger { display: flex; gap: .5rem; margin: 1rem 0; flex-wrap: wrap; align-items: flex-start; }
.set-logger .input { flex: 1; min-width: 80px; }
.set-logger__exercise { flex: 2; min-width: 160px; }

.set-table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.set-table th {
  text-align: left;
  font-size: .7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: .35rem .5rem;
  border-bottom: 1px solid var(--border);
}
.set-table td { padding: .5rem .5rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
.set-table tr:last-child td { border-bottom: none; }

.set-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* ── PR cards ──────────────────────────────────────────────────────────────── */
.pr-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }

.pr-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem;
  text-align: center;
}
.pr-card__name  { font-weight: 600; font-size: .875rem; margin-bottom: .35rem; }
.pr-card__weight { font-size: 1.75rem; font-weight: 700; color: var(--accent); line-height: 1; }
.pr-card__detail { font-size: .8rem; color: var(--text-muted); margin-top: .3rem; }
.pr-badge {
  display: inline-block;
  font-size: .65rem;
  background: rgba(245, 166, 35, .2);
  color: var(--warning);
  padding: .15rem .45rem;
  border-radius: 4px;
  font-weight: 700;
  margin-top: .5rem;
  letter-spacing: .03em;
}

/* ── Meal cards ────────────────────────────────────────────────────────────── */
.meal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: .75rem;
}
.meal-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: .75rem;
  flex-wrap: wrap;
  gap: .5rem;
}
.meal-card__title-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex: 1;
  min-width: 0;
}
.meal-card__actions { display: flex; gap: .375rem; flex-wrap: wrap; }

.food-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .45rem 0;
  border-bottom: 1px solid var(--border);
  font-size: .875rem;
  gap: .5rem;
}
.food-row:last-child { border-bottom: none; }
.food-row__name { flex: 1; min-width: 0; }
.food-row__macros { font-size: .8rem; color: var(--text-muted); white-space: nowrap; flex: 1; text-align: right; padding-right: .75rem; }
.food-row__actions { display: flex; align-items: center; gap: .25rem; flex-shrink: 0; }
.food-row__qty { font-size: .8125rem; font-weight: 600; min-width: 2rem; text-align: center; }

.meal-totals {
  display: flex;
  gap: 1.25rem;
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: .6rem;
  flex-wrap: wrap;
}
.meal-totals strong { color: var(--text); font-weight: 600; }

/* ── Food search ───────────────────────────────────────────────────────────── */
.food-search-row { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: .75rem; }
.food-search-row .input:first-child { flex: 2; min-width: 160px; }
.food-search-row .input:nth-child(2) { flex: 1; min-width: 90px; }

.food-results { max-height: 220px; overflow-y: auto; }
.food-result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .55rem .5rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  gap: .5rem;
}
.food-result-item:hover { background: var(--surface2); }
.food-result-item__name { font-weight: 500; }
.food-result-item__macros { font-size: .75rem; color: var(--text-muted); margin-top: .1rem; }
.food-result-item__controls { display: flex; align-items: center; gap: .4rem; flex-shrink: 0; }
.food-result-item__qty    { width: 52px; padding: .35rem .5rem; font-size: .8125rem; text-align: center; }
.food-result-item__amount { width: 72px; padding: .35rem .5rem; font-size: .8125rem; text-align: center; }

.ai-estimate-panel {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-bottom: .75rem;
}
.ai-estimate-panel__name { font-weight: 600; margin-bottom: .5rem; font-size: .9rem; }
.ai-estimate-panel__values { display: flex; gap: 1.5rem; font-size: .875rem; flex-wrap: wrap; margin-bottom: .75rem; }
.ai-estimate-panel__actions { display: flex; gap: .5rem; }

/* ── AI Meal Analyzer ──────────────────────────────────────────────────────── */
.nt-label { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); margin-bottom: .6rem; }
.nt-rows { display: flex; flex-direction: column; gap: .5rem; }
.nt-row { display: flex; align-items: center; gap: .75rem; }
.nt-name { font-size: .8125rem; font-weight: 500; width: 56px; flex-shrink: 0; }
.nt-bar-wrap { flex: 1; height: 6px; background: var(--surface2); border-radius: 99px; overflow: hidden; }
.nt-bar { height: 100%; background: var(--cal); border-radius: 99px; transition: width .3s; }
.nt-bar--prot { background: var(--prot); }
.nt-range { font-size: .75rem; color: var(--text-muted); white-space: nowrap; }

.meal-analyzer { padding: 1rem 1.25rem; }
.meal-analyzer__header { display: flex; align-items: baseline; gap: .75rem; margin-bottom: .75rem; }
.meal-analyzer__title { font-weight: 700; font-size: .9375rem; color: var(--accent); }
.meal-analyzer__hint { font-size: .8rem; color: var(--text-muted); }
.meal-analyzer__input-row { display: flex; gap: .5rem; }
.meal-analyzer__input-row .input { flex: 1; margin-bottom: 0; font-size: .875rem; }


.meal-analysis-result { margin-top: .875rem; }
.analysis-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .8125rem;
  margin-bottom: .75rem;
}
.analysis-table th,
.analysis-table td {
  padding: .35rem .5rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.analysis-table th { color: var(--text-muted); font-weight: 600; font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; }
.analysis-table tbody tr:hover td { background: var(--surface2); }
.analysis-table tfoot td { border-top: 2px solid var(--border); border-bottom: none; padding-top: .5rem; }
.analysis-actions { display: flex; gap: .5rem; }

/* ── Settings ──────────────────────────────────────────────────────────────── */
.field-label {
  display: block;
  font-size: .75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .4rem;
}

.settings-toggle-group {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.settings-toggle {
  font-family: var(--font);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .45rem .85rem;
  color: var(--text-muted);
  font-size: .8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.settings-toggle:hover { border-color: var(--accent); color: var(--text); }
.settings-toggle.active {
  background: rgba(108,99,255,.18);
  border-color: var(--accent);
  color: var(--text);
  font-weight: 600;
}

.settings-targets {
  margin-top: 1rem;
  padding: .75rem 1rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  color: var(--text-muted);
}

/* ── Goal cards ────────────────────────────────────────────────────────────── */
.goal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: .75rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.goal-card__check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--border);
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
  font-size: .75rem;
  color: #fff;
}
.goal-card__check:hover { border-color: var(--success); }
.goal-card__check--done { background: var(--success); border-color: var(--success); }
.goal-card__info { flex: 1; }
.goal-card__type {
  font-size: .6875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .07em;
  font-weight: 600;
  margin-bottom: .15rem;
}
.goal-card__target { font-size: 1.05rem; font-weight: 700; }
.goal-card__target--done { text-decoration: line-through; opacity: .55; }
.goal-card__deadline { font-size: .75rem; color: var(--text-muted); margin-top: .15rem; }

/* ── Modals ────────────────────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .65);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: fadeIn .15s ease;
}
.modal-backdrop.hidden { display: none; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
  animation: slideUp .2s cubic-bezier(.4, 0, .2, 1);
}
.modal-box--sm  { max-width: 400px; }
.modal-box--md  { max-width: 540px; }
.modal-box--lg  { max-width: 680px; }

@keyframes slideUp {
  from { transform: translateY(10px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}
.modal-footer {
  display: flex;
  gap: .5rem;
  justify-content: flex-end;
  margin-top: 1.25rem;
}

/* ── Toast ─────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--success);
  color: #fff;
  padding: .7rem 1.1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .875rem;
  z-index: 400;
  box-shadow: var(--shadow-sm);
  animation: toastIn .2s cubic-bezier(.4, 0, .2, 1);
  pointer-events: none;
}
.toast--error { background: var(--danger); }
.toast.hidden { display: none; }

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

/* ── Empty states ──────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}
.empty-state__icon { font-size: 2.5rem; margin-bottom: .75rem; }
.empty-state__text { font-size: .9375rem; margin-bottom: 1rem; }

/* ── Loading ───────────────────────────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--surface2) 25%, var(--border) 50%, var(--surface2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }

/* ── Footer ────────────────────────────────────────────────────────────────── */
.app-footer {
  position: fixed;
  bottom: .75rem;
  right: 1rem;
  font-family: 'Courier New', Courier, monospace;
  font-size: .7rem;
  letter-spacing: .12em;
  color: #4a5280;
  pointer-events: none;
  z-index: 50;
}

/* ── Utilities ─────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.fw-600 { font-weight: 600; }
canvas { max-width: 100%; display: block; }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  main { padding: 1.25rem 1rem; }
  h1   { font-size: 1.5rem; }
  .app-header { padding: .65rem 1rem; gap: .75rem; }
  .stat-grid  { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .row { flex-direction: column; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .exercise-grid { grid-template-columns: 1fr; }
  .pr-grid { grid-template-columns: repeat(2, 1fr); }
  .meal-card__actions { gap: .25rem; }
}