:root {
  --bg: #080808;
  --surface: #101010;
  --card: #161616;
  --card-h: #1e1e1e;
  --border: rgba(255,255,255,0.07);
  --border-s: rgba(255,255,255,0.14);
  --p: #ff4d00;
  --p-l: #ff6b35;
  --p-d: rgba(255,77,0,0.12);
  --p-d2: rgba(255,77,0,0.06);
  --blue: #3b9eff;
  --blue-d: rgba(59,158,255,0.12);
  --green: #00e676;
  --green-d: rgba(0,230,118,0.12);
  --amber: #ffb300;
  --amber-d: rgba(255,179,0,0.12);
  --red: #ff3d3d;
  --red-d: rgba(255,61,61,0.12);
  --text: #ffffff;
  --muted: #888888;
  --dim: #444444;
  --r: 4px;
  --r-sm: 2px;
  --r-lg: 6px;
  --r-xl: 8px;
  --sidebar-w: 220px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ─── LOGIN ─── */
#login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 1rem;
  position: relative;
  overflow: hidden;
}
#login-screen::before {
  content: '';
  position: absolute;
  top: -200px; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255,77,0,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.login-box {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--border-s);
  border-radius: var(--r-xl);
  padding: 2.5rem 2rem;
  text-align: center;
  position: relative;
}

.login-logo {
  width: 60px; height: 60px;
  background: var(--p);
  border-radius: var(--r-lg);
  margin: 0 auto 1.5rem;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; font-weight: 900; color: #fff;
  letter-spacing: -1px;
  clip-path: polygon(0 0, 100% 0, 100% 75%, 85% 100%, 0 100%);
}

.login-title {
  font-size: 1.5rem; font-weight: 800;
  color: var(--text); margin-bottom: .25rem;
  text-transform: uppercase; letter-spacing: .04em;
}
.login-sub { font-size: .85rem; color: var(--muted); margin-bottom: 2rem; }

.login-box input[type="password"] {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border-s);
  border-radius: var(--r);
  padding: .8rem 1rem;
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color .2s;
  margin-bottom: 1rem;
  font-family: inherit;
}
.login-box input[type="password"]:focus { border-color: var(--p); }

.btn-login {
  width: 100%;
  background: var(--p);
  border: none;
  border-radius: var(--r);
  padding: .85rem;
  color: #fff;
  font-size: .95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .2s, transform .1s;
}
.btn-login:hover { background: var(--p-l); }
.btn-login:active { transform: scale(.98); }

.login-err { margin-top: .75rem; font-size: .85rem; color: var(--red); display: none; }

/* ─── APP LAYOUT ─── */
#app { display: flex; min-height: 100vh; }

#sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 1.25rem .75rem;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  display: flex; align-items: center; gap: .6rem;
  padding: .25rem .5rem 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.sidebar-logo {
  width: 34px; height: 34px;
  background: var(--p);
  clip-path: polygon(0 0, 100% 0, 100% 75%, 85% 100%, 0 100%);
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: .8rem; color: #fff;
  flex-shrink: 0;
}

.sidebar-brand-text { font-size: .95rem; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; }
.sidebar-brand-text span { display: block; font-size: .7rem; font-weight: 400; color: var(--muted); text-transform: none; letter-spacing: 0; }

.nav-item {
  display: flex; align-items: center; gap: .65rem;
  padding: .6rem .75rem;
  border-radius: var(--r);
  color: var(--muted);
  cursor: pointer;
  font-size: .85rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .05em;
  transition: background .15s, color .15s;
  user-select: none; margin-bottom: 2px;
  border-left: 2px solid transparent;
}
.nav-item:hover { background: var(--card); color: var(--text); }
.nav-item.active { background: var(--p-d); color: var(--p); border-left-color: var(--p); }
.nav-item i { font-size: 1rem; flex-shrink: 0; }

.sidebar-spacer { flex: 1; }
.sidebar-logout {
  display: flex; align-items: center; gap: .65rem;
  padding: .6rem .75rem;
  border-radius: var(--r);
  color: var(--dim);
  cursor: pointer; font-size: .8rem;
  transition: color .2s;
}
.sidebar-logout:hover { color: var(--red); }

#main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding: 1.75rem 2rem;
  min-height: 100vh;
}

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

.page-title {
  font-size: 1.25rem; font-weight: 900;
  text-transform: uppercase; letter-spacing: .06em;
  margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: .5rem;
  color: var(--text);
}
.page-title i { color: var(--p); }

/* ─── CARDS ─── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.25rem 1.5rem;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .875rem;
  margin-bottom: 1.25rem;
}

.metric-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.1rem 1.25rem;
  position: relative;
  overflow: hidden;
  transition: border-color .2s, transform .2s;
}
.metric-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
}
.metric-card.orange::after { background: var(--p); }
.metric-card.blue::after { background: var(--blue); }
.metric-card.green::after { background: var(--green); }
.metric-card.amber::after { background: var(--amber); }
.metric-card:hover { border-color: var(--border-s); transform: translateY(-2px); }

.metric-icon {
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; margin-bottom: .7rem;
}
.metric-card.orange .metric-icon { color: var(--p); }
.metric-card.blue .metric-icon { color: var(--blue); }
.metric-card.green .metric-icon { color: var(--green); }
.metric-card.amber .metric-icon { color: var(--amber); }

.metric-label {
  font-size: .68rem; color: var(--muted);
  font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  margin-bottom: .35rem;
}
.metric-value { font-size: 1.8rem; font-weight: 900; line-height: 1; }
.metric-unit { font-size: .85rem; font-weight: 400; color: var(--muted); }
.metric-sub { font-size: .72rem; color: var(--dim); margin-top: .35rem; }
.metric-delta-pos { color: var(--green); }
.metric-delta-neg { color: var(--red); }

/* ─── GRID ─── */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.three-col { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: .75rem; }
.four-col { display: grid; grid-template-columns: repeat(4, 1fr); gap: .75rem; }

/* ─── FORM ─── */
.form-group { margin-bottom: 1rem; }
.form-label {
  display: block; font-size: .7rem; font-weight: 700;
  color: var(--muted); margin-bottom: .4rem;
  text-transform: uppercase; letter-spacing: .07em;
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border-s);
  border-radius: var(--r);
  padding: .65rem .9rem;
  color: var(--text);
  font-size: .9rem;
  outline: none;
  transition: border-color .2s;
  font-family: inherit;
}
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--p); }
.form-select option { background: var(--card); }
.form-textarea { height: 80px; resize: vertical; }

.range-wrap { display: flex; align-items: center; gap: .75rem; }
.range-wrap input[type=range] {
  flex: 1; accent-color: var(--p);
  height: 3px; cursor: pointer;
}
.range-val {
  width: 28px; text-align: center;
  font-size: .9rem; font-weight: 700; color: var(--p);
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .6rem 1.1rem;
  border-radius: var(--r);
  font-size: .8rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .05em;
  cursor: pointer; border: none;
  transition: opacity .2s, transform .1s;
  font-family: inherit;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--p); color: #fff; }
.btn-primary:hover { background: var(--p-l); }
.btn-secondary { background: var(--surface); border: 1px solid var(--border-s); color: var(--text); }
.btn-secondary:hover { background: var(--card-h); }
.btn-danger { background: var(--red-d); color: var(--red); border: 1px solid rgba(255,61,61,.2); }
.btn-danger:hover { background: rgba(255,61,61,.2); }
.btn-sm { padding: .35rem .7rem; font-size: .72rem; }
.btn-icon { padding: .45rem; width: 30px; height: 30px; justify-content: center; }

/* ─── BADGE ─── */
.badge {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .2rem .6rem; border-radius: 2px;
  font-size: .68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .05em;
}
.badge-orange { background: var(--p-d); color: var(--p); }
.badge-blue { background: var(--blue-d); color: var(--blue); }
.badge-green { background: var(--green-d); color: var(--green); }
.badge-amber { background: var(--amber-d); color: var(--amber); }
.badge-red { background: var(--red-d); color: var(--red); }
.badge-gray { background: rgba(255,255,255,.06); color: var(--muted); }

/* ─── SE GRID ─── */
.se-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem; margin-top: .5rem; }
.se-item {
  display: flex; align-items: center; gap: .5rem;
  padding: .5rem .7rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  cursor: pointer; font-size: .82rem; color: var(--muted);
  transition: all .15s; user-select: none;
}
.se-item:hover { border-color: var(--border-s); color: var(--text); }
.se-item.active { background: var(--red-d); border-color: rgba(255,61,61,.3); color: var(--red); }
.se-item i { font-size: .95rem; }

/* ─── INJECTION SITES ─── */
.site-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; }
.site-btn {
  padding: .5rem .25rem; text-align: center;
  border: 1px solid var(--border); border-radius: var(--r);
  font-size: .75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em;
  color: var(--muted); cursor: pointer;
  transition: all .15s; background: var(--surface);
}
.site-btn:hover { border-color: var(--border-s); color: var(--text); }
.site-btn.active { background: var(--blue-d); border-color: rgba(59,158,255,.3); color: var(--blue); }

/* ─── TDEE CALCULATOR ─── */
.tdee-result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; margin-top: 1.25rem; }
.tdee-result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1rem 1.1rem;
  text-align: center;
  position: relative; overflow: hidden;
}
.tdee-result-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
}
.tdee-result-card.bmr::before { background: var(--blue); }
.tdee-result-card.tdee::before { background: var(--p); }
.tdee-result-card.deficit::before { background: var(--green); }
.tdee-result-card.surplus::before { background: var(--amber); }

.tdee-result-label {
  font-size: .65rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--muted); margin-bottom: .4rem;
}
.tdee-result-val {
  font-size: 2rem; font-weight: 900;
  line-height: 1; margin-bottom: .25rem;
}
.tdee-result-card.bmr .tdee-result-val { color: var(--blue); }
.tdee-result-card.tdee .tdee-result-val { color: var(--p); }
.tdee-result-card.deficit .tdee-result-val { color: var(--green); }
.tdee-result-card.surplus .tdee-result-val { color: var(--amber); }
.tdee-result-unit { font-size: .75rem; color: var(--muted); }

.formula-tabs { display: flex; gap: .5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.formula-tab {
  padding: .45rem .9rem;
  border: 1px solid var(--border-s);
  border-radius: var(--r);
  font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .05em;
  cursor: pointer; color: var(--muted);
  background: var(--surface); transition: all .15s;
}
.formula-tab:hover { color: var(--text); }
.formula-tab.active { background: var(--p); border-color: var(--p); color: #fff; }

.activity-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: .5rem; margin-top: .5rem; }
.activity-btn {
  padding: .6rem .4rem; text-align: center;
  border: 1px solid var(--border);
  border-radius: var(--r); cursor: pointer;
  font-size: .68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .03em;
  color: var(--muted); background: var(--surface);
  transition: all .15s; line-height: 1.3;
}
.activity-btn:hover { border-color: var(--border-s); color: var(--text); }
.activity-btn.active { background: var(--p-d); border-color: var(--p); color: var(--p); }
.activity-btn span { display: block; font-size: .6rem; color: inherit; opacity: .7; margin-top: .2rem; font-weight: 400; text-transform: none; }

.tdee-formula-info {
  background: var(--p-d2);
  border: 1px solid rgba(255,77,0,.15);
  border-radius: var(--r);
  padding: .75rem 1rem;
  font-size: .8rem;
  color: var(--muted);
  margin-top: 1rem;
  font-family: var(--font-mono, monospace);
}
.tdee-formula-info strong { color: var(--p); }

/* ─── CALENDAR ─── */
.cal-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.cal-nav-btn {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: .4rem .7rem;
  color: var(--muted); cursor: pointer; transition: color .2s;
}
.cal-nav-btn:hover { color: var(--text); border-color: var(--border-s); }
.cal-month { font-size: 1rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal-day-name {
  text-align: center; font-size: .65rem; color: var(--dim);
  padding: .3rem 0; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
}
.cal-day {
  aspect-ratio: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border-radius: var(--r); font-size: .82rem; cursor: pointer;
  border: 1px solid transparent;
  transition: all .15s; position: relative; color: var(--muted);
  font-weight: 600;
}
.cal-day:hover:not(.empty) { background: var(--card-h); color: var(--text); border-color: var(--border); }
.cal-day.today { color: var(--p); font-weight: 900; border-color: var(--p); background: var(--p-d2); }
.cal-day.has-injection { background: var(--blue-d); color: var(--blue); border-color: rgba(59,158,255,.25); }
.cal-day.has-entry { background: var(--green-d); color: var(--green); border-color: rgba(0,230,118,.25); }
.cal-day.empty { cursor: default; }
.cal-dot { width: 4px; height: 4px; border-radius: 50%; position: absolute; bottom: 3px; }
.cal-dot.inj { background: var(--blue); }
.cal-dot.ent { background: var(--green); }

/* ─── PHOTOS ─── */
.photo-upload-zone {
  border: 2px dashed var(--border-s);
  border-radius: var(--r-lg);
  padding: 2.5rem;
  text-align: center; cursor: pointer;
  transition: all .2s; background: var(--surface);
}
.photo-upload-zone:hover, .photo-upload-zone.drag {
  border-color: var(--p); background: var(--p-d2);
}
.photo-upload-zone i { font-size: 2.5rem; color: var(--dim); display: block; margin-bottom: .75rem; }
.photo-upload-zone p { color: var(--muted); font-size: .9rem; }
.photo-upload-zone span { color: var(--p); font-weight: 700; }

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: .75rem; margin-top: 1rem;
}
.photo-card {
  border-radius: var(--r-lg); overflow: hidden;
  background: var(--card); border: 1px solid var(--border);
  cursor: pointer; transition: transform .2s, border-color .2s;
  position: relative;
}
.photo-card:hover { transform: translateY(-3px); border-color: var(--border-s); }
.photo-card img { width: 100%; aspect-ratio: 3/4; object-fit: cover; display: block; }
.photo-card-info { padding: .5rem .65rem; }
.photo-card-date { font-size: .72rem; color: var(--muted); }
.photo-card-weight { font-size: .8rem; color: var(--text); font-weight: 700; }
.photo-card-del {
  position: absolute; top: 6px; right: 6px;
  background: rgba(0,0,0,.7); border-radius: var(--r);
  width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: .85rem; opacity: 0; transition: opacity .2s;
  cursor: pointer;
}
.photo-card:hover .photo-card-del { opacity: 1; }

.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1rem; }
.compare-slot {
  border: 2px dashed var(--border-s);
  border-radius: var(--r-lg); padding: 1rem;
  text-align: center; min-height: 200px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: .5rem; color: var(--muted); font-size: .9rem;
  position: relative; overflow: hidden;
}
.compare-slot img { width: 100%; height: 260px; object-fit: cover; border-radius: var(--r); }
.compare-slot.filled { border-style: solid; border-color: var(--border); }

/* ─── CHARTS ─── */
.chart-wrap { position: relative; width: 100%; }

/* ─── TABLE ─── */
.data-table { width: 100%; border-collapse: collapse; font-size: .855rem; }
.data-table th {
  text-align: left; padding: .55rem 1rem;
  font-size: .65rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--dim); font-weight: 700;
  border-bottom: 1px solid var(--border);
}
.data-table td {
  padding: .7rem 1rem; border-bottom: 1px solid var(--border);
  color: var(--muted); vertical-align: middle;
}
.data-table td:first-child { color: var(--text); font-weight: 600; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--card-h); }
.data-table .empty-row td { text-align: center; padding: 2rem; color: var(--dim); }

/* ─── SECTION HEADER ─── */
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.section-sub {
  font-size: .7rem; font-weight: 700;
  color: var(--muted); text-transform: uppercase; letter-spacing: .08em;
  display: flex; align-items: center; gap: .4rem;
}
hr.divider { border: none; border-top: 1px solid var(--border); margin: 1.25rem 0; }

/* ─── TOAST ─── */
#toast {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  background: var(--card); border: 1px solid var(--border-s);
  border-radius: var(--r-lg); padding: .75rem 1.25rem;
  font-size: .875rem; font-weight: 600;
  display: flex; align-items: center; gap: .5rem;
  transform: translateY(80px) scale(.95); opacity: 0;
  transition: all .3s cubic-bezier(.34,1.56,.64,1);
  z-index: 999; pointer-events: none;
}
#toast.show { transform: translateY(0) scale(1); opacity: 1; }
#toast.success { border-left: 3px solid var(--green); }
#toast.error { border-left: 3px solid var(--red); }

/* ─── MODAL ─── */
.modal-bg {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.85);
  z-index: 500;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
  opacity: 0; pointer-events: none;
  transition: opacity .25s;
}
.modal-bg.open { opacity: 1; pointer-events: all; }
.modal {
  background: var(--card);
  border: 1px solid var(--border-s);
  border-radius: var(--r-xl);
  width: 100%; max-width: 520px;
  max-height: 90vh; overflow-y: auto;
  padding: 1.75rem;
  transform: translateY(24px) scale(.97);
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}
.modal-bg.open .modal { transform: translateY(0) scale(1); }
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; }
.modal-title { font-size: 1rem; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; }
.modal-close {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--muted); transition: color .2s;
}
.modal-close:hover { color: var(--text); }

/* ─── LIGHTBOX ─── */
#lightbox {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.95);
  z-index: 600;
  display: none; align-items: center; justify-content: center;
}
#lightbox.open { display: flex; }
#lightbox img { max-width: 90vw; max-height: 90vh; border-radius: var(--r); object-fit: contain; }
#lightbox-close {
  position: absolute; top: 1rem; right: 1rem;
  background: rgba(255,255,255,.1); border: none; border-radius: 50%;
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: #fff; font-size: 1.1rem; transition: background .2s;
}
#lightbox-close:hover { background: rgba(255,255,255,.2); }

/* ─── BOTTOM NAV (mobile) ─── */
#bottom-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  z-index: 100;
  padding: .25rem 0 env(safe-area-inset-bottom);
}
.bottom-nav-inner { display: flex; justify-content: space-around; }
.bn-item {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  padding: .5rem .25rem;
  color: var(--dim); cursor: pointer; font-size: .58rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .04em;
  transition: color .15s; gap: .2rem;
}
.bn-item i { font-size: 1.25rem; }
.bn-item.active { color: var(--p); }
.bn-fab {
  width: 46px; height: 46px;
  background: var(--p);
  clip-path: polygon(0 0, 100% 0, 100% 75%, 85% 100%, 0 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.3rem;
  margin-top: -10px;
  cursor: pointer; transition: transform .2s;
}
.bn-fab:hover { transform: scale(1.08); }

/* ─── PROGRESS BAR ─── */
.prog-bar-bg { background: var(--surface); border-radius: 2px; height: 4px; overflow: hidden; }
.prog-bar { height: 4px; border-radius: 2px; background: var(--p); transition: width .6s ease; }
.prog-bar.green { background: var(--green); }
.prog-bar.blue { background: var(--blue); }

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  #sidebar { transform: translateX(-100%); }
  #main-content { margin-left: 0; padding: 1.25rem 1rem 5rem; }
  #bottom-nav { display: block; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .three-col { grid-template-columns: 1fr 1fr; }
  .four-col { grid-template-columns: 1fr 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .tdee-result-grid { grid-template-columns: 1fr 1fr; }
  .activity-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .metric-grid { grid-template-columns: 1fr 1fr; gap: .6rem; }
  .metric-value { font-size: 1.4rem; }
  .se-grid { grid-template-columns: 1fr; }
  .site-grid { grid-template-columns: repeat(2, 1fr); }
  .three-col { grid-template-columns: 1fr; }
  .tdee-result-grid { grid-template-columns: 1fr; }
  .activity-grid { grid-template-columns: 1fr 1fr; }
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--dim); border-radius: 2px; }

@keyframes pulse-dot { 0%,100%{opacity:1}50%{opacity:.3} }
.live-dot { width: 7px; height: 7px; background: var(--green); border-radius: 50%; display: inline-block; animation: pulse-dot 2s infinite; }

@keyframes fadeSlideUp { from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)} }
.anim { animation: fadeSlideUp .4s ease both; }