/* ────────────────────────────────────────────────────────────
   style.css — Gym Tracker Pro · Design System
   ──────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ─── Tokens ─────────────────────────────────────────────── */
:root {
  --font: 'Inter', system-ui, sans-serif;

  /* Colors */
  --bg:          #090909;
  --bg-1:        #111113;
  --bg-2:        #1a1a1f;
  --bg-3:        #242429;
  --border:      rgba(255,255,255,0.08);
  --border-hi:   rgba(255,255,255,0.14);

  --text-1:      #f0f0f4;
  --text-2:      #9090a0;
  --text-3:      #5a5a6a;

  --blue:        #3b82f6;
  --blue-glow:   rgba(59,130,246,0.25);
  --green:       #22c55e;
  --green-glow:  rgba(34,197,94,0.2);
  --amber:       #f59e0b;
  --amber-glow:  rgba(245,158,11,0.2);
  --purple:      #a78bfa;
  --red:         #f87171;
  --teal:        #2dd4bf;

  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   18px;
  --radius-xl:   24px;

  --shadow-md:   0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow-blue:  0 0 20px rgba(59,130,246,0.15);
  --shadow-glow-green: 0 0 20px rgba(34,197,94,0.15);

  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

/* ─── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text-1); line-height: 1.5; min-height: 100dvh; overflow-x: hidden; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

/* ─── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-3); border-radius: 2px; }

/* ─── Layout ─────────────────────────────────────────────── */
#app-shell { display: flex; flex-direction: column; min-height: 100dvh; }

/* ─── Top Nav ────────────────────────────────────────────── */
.top-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  background: rgba(9,9,9,0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 200;
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo h1 { font-size: 16px; font-weight: 700; letter-spacing: -0.4px; }
.nav-logo svg { flex-shrink: 0; }
.streak-pill {
  display: flex; align-items: center; gap: 5px;
  background: rgba(245,158,11,0.12); color: var(--amber);
  border: 1px solid rgba(245,158,11,0.2);
  padding: 5px 12px; border-radius: 20px;
  font-size: 13px; font-weight: 600;
}

/* ─── Bottom Nav ─────────────────────────────────────────── */
.bottom-nav {
  display: flex; justify-content: space-around; align-items: center;
  padding: 10px 4px calc(10px + env(safe-area-inset-bottom));
  background: rgba(9,9,9,0.92);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 200;
}
.nav-btn {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 6px 14px; border-radius: var(--radius-md);
  font-size: 10px; font-weight: 600; color: var(--text-3);
  transition: all var(--transition); letter-spacing: 0.3px; text-transform: uppercase;
  min-width: 56px;
}
.nav-btn .nav-icon { font-size: 22px; line-height: 1; }
.nav-btn.active { color: var(--blue); }
.nav-btn.active .nav-icon { filter: drop-shadow(0 0 6px var(--blue)); }

/* ─── Page / Screen ──────────────────────────────────────── */
.page { display: none; flex-direction: column; padding: 16px; max-width: 600px; margin: 0 auto; width: 100%; padding-bottom: 90px; }
.page.active { display: flex; }

/* ─── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 14px;
}
.card-elevated {
  background: linear-gradient(135deg, var(--bg-2), var(--bg-1));
  border-color: var(--border-hi);
  box-shadow: var(--shadow-md);
}
.card-title { font-size: 12px; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; }

/* ─── Hero / Today Card ──────────────────────────────────── */
.hero-card {
  background: linear-gradient(135deg, #0f0f1a 0%, #111120 50%, #0a0a14 100%);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius-xl);
  padding: 22px 20px;
  margin-bottom: 16px;
  position: relative; overflow: hidden;
}
.hero-card::before {
  content:''; position:absolute; top:-60px; right:-60px;
  width:200px; height:200px;
  background: radial-gradient(circle, rgba(59,130,246,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-date { font-size: 12px; color: var(--text-3); font-weight: 500; margin-bottom: 4px; }
.hero-day-name { font-size: 26px; font-weight: 800; letter-spacing: -0.8px; margin-bottom: 6px; }
.hero-status { font-size: 14px; color: var(--blue); font-weight: 600; }
.hero-status.rest { color: var(--text-2); }

/* ─── Stats Row ──────────────────────────────────────────── */
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 14px; }
.stat-tile {
  background: var(--bg-1); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 14px 10px; text-align: center;
}
.stat-tile .stat-val { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }
.stat-tile .stat-lbl { font-size: 10px; color: var(--text-3); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; margin-top: 2px; }
.stat-tile.streak .stat-val { color: var(--amber); }
.stat-tile.days .stat-val   { color: var(--green); }
.stat-tile.prot .stat-val   { color: var(--blue); }

/* ─── Meal Card ──────────────────────────────────────────── */
.meal-card { background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px; margin-bottom: 14px; }
.meal-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.meal-icon { font-size: 28px; }
.meal-name { font-size: 17px; font-weight: 700; }
.meal-time { font-size: 12px; color: var(--text-3); margin-top: 1px; }
.meal-items { list-style: none; }
.meal-items li { font-size: 14px; color: var(--text-2); padding: 5px 0; border-bottom: 1px solid var(--border); display: flex; align-items: flex-start; gap: 8px; }
.meal-items li:last-child { border-bottom: none; }
.meal-items li::before { content:'•'; color: var(--green); font-size: 16px; line-height: 1.3; flex-shrink: 0; }
.meal-next-btn { width:100%; margin-top:12px; padding:10px; border-radius:var(--radius-md); border:1px solid var(--border-hi); background:var(--bg-3); font-size:13px; font-weight:600; color:var(--text-2); transition: all var(--transition); }
.meal-next-btn:hover { background:var(--bg-2); color:var(--text-1); }

/* ─── Sleep Card ─────────────────────────────────────────── */
.sleep-card { background: linear-gradient(135deg,rgba(167,139,250,0.08),rgba(59,130,246,0.05)); border-color:rgba(167,139,250,0.2); }
.sleep-time { font-size: 32px; font-weight: 800; color: var(--purple); letter-spacing: -1px; }
.sleep-info  { font-size: 13px; color: var(--text-2); margin-top: 4px; }

/* ─── Workout Screen ─────────────────────────────────────── */
.day-tabs { display:flex; gap:8px; overflow-x:auto; padding-bottom:10px; scrollbar-width:none; margin-bottom:14px; }
.day-tabs::-webkit-scrollbar { display:none; }
.day-tab {
  padding: 7px 15px; border-radius: 20px; font-size: 13px; font-weight: 600;
  border: 1px solid var(--border); background: var(--bg-2); color: var(--text-2);
  white-space: nowrap; transition: all var(--transition);
}
.day-tab.active { background: var(--text-1); color: var(--bg); border-color: var(--text-1); }
.day-tab.rest   { border-style: dashed; opacity: 0.6; }

.ex-progress-bar { height: 4px; background: var(--bg-3); border-radius: 2px; margin-bottom: 14px; overflow: hidden; }
.ex-progress-fill { height: 100%; background: linear-gradient(90deg, var(--blue), var(--green)); transition: width 0.4s ease; }
.ex-progress-text { font-size: 12px; color: var(--text-3); text-align: right; margin-bottom: 6px; }

.ex-card { background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 18px; margin-bottom: 14px; animation: slideUp 0.25s ease; }
@keyframes slideUp { from { opacity:0; transform:translateY(12px); } to { opacity:1; transform:translateY(0); } }

.muscle-badge { display: inline-flex; align-items:center; font-size:11px; font-weight:700; padding:4px 10px; border-radius:20px; margin-bottom:10px; letter-spacing:0.3px; }
.ex-name { font-size: 16px; font-weight: 700; margin-bottom: 4px; line-height: 1.3; }
.ex-meta { display:flex; gap:12px; align-items:center; margin-bottom:16px; }
.ex-tag { font-size:10px; font-weight:700; padding:2px 8px; border-radius:10px; background:rgba(59,130,246,0.15); color:var(--blue); }
.ex-tag.nuevo { background:rgba(34,197,94,0.15); color:var(--green); }

/* Set grid */
.set-grid { display:grid; grid-template-columns:28px 1fr 1fr 80px; gap:8px; align-items:center; margin-bottom:8px; }
.set-hdr { font-size:10px; color:var(--text-3); text-align:center; text-transform:uppercase; letter-spacing:0.5px; }
.set-num { font-size:12px; font-weight:700; color:var(--text-3); text-align:center; }

.weight-grp { display:flex; align-items:center; background:var(--bg-2); border:1px solid var(--border); border-radius:var(--radius-sm); overflow:hidden; transition:all var(--transition); }
.weight-grp:focus-within { border-color:var(--blue); box-shadow:0 0 0 2px var(--blue-glow); }
.weight-grp.improved { border-color:var(--green); background:rgba(34,197,94,0.08); }

input[type=number] { -moz-appearance:textfield; appearance:textfield; }
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button { -webkit-appearance:none; margin:0; }

.inp-w { width:100%; padding:10px 4px; font-size:14px; font-weight:600; border:none; background:transparent; color:var(--text-1); text-align:center; outline:none; }
.unit-sel { background:transparent; color:var(--text-3); border:none; font-size:10px; padding:0 5px 0 0; outline:none; cursor:pointer; }
.unit-sel option { background:var(--bg-2); }

.inp-r { width:100%; padding:10px 4px; font-size:14px; font-weight:600; border-radius:var(--radius-sm); border:1px solid var(--border); background:var(--bg-2); color:var(--text-1); text-align:center; transition:all var(--transition); outline:none; }
.inp-r:focus { border-color:var(--blue); box-shadow:0 0 0 2px var(--blue-glow); }
.inp-r.improved { border-color:var(--green); background:rgba(34,197,94,0.08); color:var(--green); }

.prev-val { font-size:11px; color:var(--text-3); text-align:center; font-variant-numeric:tabular-nums; }
.prev-val.up { color:var(--green); font-weight:600; }

.ex-footer { margin-top:14px; padding-top:12px; border-top:1px solid var(--border); font-size:12px; color:var(--text-3); display:flex; justify-content:space-between; }

/* Timer */
.timer-card { display:flex; align-items:center; gap:14px; background:var(--bg-2); border:1px solid rgba(59,130,246,0.3); border-radius:var(--radius-lg); padding:14px; margin-bottom:14px; box-shadow:var(--shadow-glow-blue); }
.timer-num { font-size:28px; font-weight:800; min-width:64px; font-variant-numeric:tabular-nums; }
.timer-bar-bg { flex:1; height:6px; background:var(--bg); border-radius:3px; overflow:hidden; }
.timer-bar-fill { height:100%; border-radius:3px; transition:width 1s linear, background 0.3s; }
.timer-stop { font-size:12px; padding:8px 12px; border-radius:var(--radius-sm); border:1px solid var(--border-hi); background:var(--bg-3); color:var(--text-2); font-weight:600; }

/* Nav buttons inside workout */
.ex-nav { display:flex; gap:10px; margin-top:14px; }
.btn-prev { flex-shrink:0; padding:14px 16px; border-radius:var(--radius-md); border:1px solid var(--border); background:transparent; color:var(--text-2); font-size:14px; font-weight:600; transition:all var(--transition); }
.btn-next { flex:1; padding:14px; border-radius:var(--radius-md); border:1px solid rgba(59,130,246,0.3); background:rgba(59,130,246,0.1); color:var(--blue); font-size:15px; font-weight:700; transition:all var(--transition); }
.btn-next:active { background:rgba(59,130,246,0.2); }
.btn-save { flex:1; padding:16px; border-radius:var(--radius-md); background:var(--text-1); color:var(--bg); font-size:15px; font-weight:700; box-shadow:0 4px 16px rgba(255,255,255,0.1); transition:transform 0.1s; }
.btn-save:active { transform:scale(0.97); }

/* Rest day */
.rest-card { background:var(--bg-1); border:1px dashed var(--border); border-radius:var(--radius-lg); padding:48px 24px; text-align:center; }
.rest-card h3 { font-size:20px; font-weight:700; margin-bottom:8px; }
.rest-card p  { font-size:14px; color:var(--text-2); }

/* ─── Diet / Shopping ────────────────────────────────────── */
.phase-tabs { display:flex; gap:6px; margin-bottom:14px; }
.phase-tab { flex:1; padding:10px; border-radius:var(--radius-md); border:1px solid var(--border); background:var(--bg-2); font-size:12px; font-weight:700; color:var(--text-2); text-align:center; transition:all var(--transition); }
.phase-tab.active.detox   { background:rgba(239,68,68,0.12);  border-color:rgba(239,68,68,0.3);  color:var(--red); }
.phase-tab.active.minicut { background:rgba(245,158,11,0.12); border-color:rgba(245,158,11,0.3); color:var(--amber); }
.phase-tab.active.volumen { background:rgba(34,197,94,0.12);  border-color:rgba(34,197,94,0.3);  color:var(--green); }

.shopping-cat { margin-bottom:16px; }
.shopping-cat h3 { font-size:13px; font-weight:700; margin-bottom:8px; }
.shopping-cat ul { list-style:none; }
.shopping-cat li { display:flex; justify-content:space-between; align-items:center; padding:8px 12px; border-bottom:1px solid var(--border); font-size:13px; }
.shopping-cat li:last-child { border-bottom:none; }
.shopping-badge { font-size:10px; font-weight:700; padding:2px 8px; border-radius:10px; background:var(--bg-3); color:var(--text-3); }

/* ─── Settings Screen ────────────────────────────────────── */
.settings-section { margin-bottom:20px; }
.settings-section h3 { font-size:12px; font-weight:700; color:var(--text-3); text-transform:uppercase; letter-spacing:1px; margin-bottom:10px; }
.setting-row { display:flex; justify-content:space-between; align-items:center; padding:14px 0; border-bottom:1px solid var(--border); }
.setting-row:last-child { border-bottom:none; }
.setting-label { font-size:15px; font-weight:500; }
.setting-sub   { font-size:12px; color:var(--text-3); margin-top:2px; }

.toggle { position:relative; width:44px; height:26px; }
.toggle input { opacity:0; width:0; height:0; }
.toggle-slider { position:absolute; inset:0; background:var(--bg-3); border-radius:13px; transition:all 0.3s; cursor:pointer; border:1px solid var(--border); }
.toggle-slider::before { content:''; position:absolute; width:18px; height:18px; left:3px; top:3px; background:var(--text-2); border-radius:50%; transition:all 0.3s; }
.toggle input:checked + .toggle-slider { background:var(--green); border-color:var(--green); }
.toggle input:checked + .toggle-slider::before { transform:translateX(18px); background:#fff; }

.inp-setting { background:var(--bg-2); border:1px solid var(--border); border-radius:var(--radius-sm); color:var(--text-1); padding:8px 12px; font-size:15px; width:90px; text-align:center; outline:none; transition:all var(--transition); }
.inp-setting:focus { border-color:var(--blue); }

.select-setting { background:var(--bg-2); border:1px solid var(--border); border-radius:var(--radius-sm); color:var(--text-1); padding:8px 12px; font-size:14px; outline:none; cursor:pointer; }
.select-setting option { background:var(--bg-2); }

.btn-primary { width:100%; padding:14px; border-radius:var(--radius-md); background:var(--blue); color:#fff; font-size:15px; font-weight:700; transition:all var(--transition); }
.btn-primary:hover { background:#2563eb; }
.btn-outline { width:100%; padding:14px; border-radius:var(--radius-md); border:1px solid var(--border-hi); background:transparent; color:var(--text-1); font-size:15px; font-weight:600; margin-top:10px; transition:all var(--transition); }
.btn-outline:hover { background:var(--bg-2); }

/* ─── Achievements ───────────────────────────────────────── */
.ach-grid { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.ach-tile { background:var(--bg-2); border:1px solid var(--border); border-radius:var(--radius-md); padding:14px; text-align:center; transition:all var(--transition); }
.ach-tile.unlocked { border-color:rgba(245,158,11,0.3); background:rgba(245,158,11,0.06); }
.ach-tile.locked   { opacity:0.45; filter:grayscale(0.5); }
.ach-icon { font-size:28px; margin-bottom:6px; }
.ach-title { font-size:12px; font-weight:700; margin-bottom:3px; }
.ach-desc  { font-size:11px; color:var(--text-3); line-height:1.4; }

/* ─── Toast ──────────────────────────────────────────────── */
.toast {
  position:fixed; left:50%; bottom:90px;
  transform:translateX(-50%) translateY(20px);
  background:var(--green); color:#000;
  padding:12px 22px; border-radius:30px;
  font-weight:700; font-size:14px;
  box-shadow:0 4px 24px var(--green-glow);
  opacity:0; transition:all 0.3s cubic-bezier(0.175,0.885,0.32,1.275);
  z-index:999; pointer-events:none; white-space:nowrap;
}
.toast.show { opacity:1; transform:translateX(-50%) translateY(0); }
.toast.error { background:var(--red); box-shadow:0 4px 24px rgba(248,113,113,0.3); }

/* ─── Section headings ───────────────────────────────────── */
.section-hd { display:flex; align-items:center; justify-content:space-between; margin-bottom:12px; }
.section-hd h2 { font-size:15px; font-weight:700; }
.section-hd a  { font-size:13px; color:var(--blue); font-weight:600; }

/* ─── Tip Banner ─────────────────────────────────────────── */
.tip-banner { background:rgba(59,130,246,0.06); border:1px solid rgba(59,130,246,0.15); border-radius:var(--radius-md); padding:12px 14px; font-size:13px; color:var(--text-2); margin-bottom:14px; line-height:1.5; }

/* ─── Utilities ──────────────────────────────────────────── */
.mt-8  { margin-top:8px; }
.mt-12 { margin-top:12px; }
.flex  { display:flex; }
.gap-8 { gap:8px; }
.text-green { color:var(--green); }
.text-amber { color:var(--amber); }
.text-blue  { color:var(--blue); }
.text-muted { color:var(--text-2); }
.fw-700 { font-weight:700; }
.fs-12  { font-size:12px; }
.fs-13  { font-size:13px; }

/* ─── Upload zone ────────────────────────────────────────── */
.upload-zone { border:2px dashed var(--border-hi); border-radius:var(--radius-lg); padding:32px; text-align:center; cursor:pointer; transition:all var(--transition); }
.upload-zone:hover { border-color:var(--blue); background:rgba(59,130,246,0.04); }
.upload-zone p { font-size:14px; color:var(--text-3); margin-top:8px; }

/* ─── Animations ─────────────────────────────────────────── */
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }
@keyframes pulse  { 0%,100%{opacity:1;} 50%{opacity:0.5;} }
.animate-pulse { animation: pulse 2s infinite; }