/* ============================================================
   PRIMETAN — Apple Dark × Biotech
   ============================================================ */

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

:root {
  --bg:           #000000;
  --bg2:          #0a0a0a;
  --bg3:          #111111;
  --surface:      #1a1a1a;
  --surface2:     #222222;
  --surface3:     #2a2a2a;
  --border:       rgba(255,255,255,0.08);
  --border2:      rgba(255,255,255,0.05);
  --border-hover: rgba(255,255,255,0.14);
  --accent:       #00d4aa;
  --accent-soft:  rgba(0,212,170,0.1);
  --accent-mid:   rgba(0,212,170,0.28);
  --success:      #30d158;
  --success-soft: rgba(48,209,88,0.1);
  --warn:         #ff9f0a;
  --warn-soft:    rgba(255,159,10,0.1);
  --danger:       #ff453a;
  --danger-soft:  rgba(255,69,58,0.1);
  --text:         rgba(255,255,255,0.92);
  --text-2:       rgba(255,255,255,0.5);
  --text-3:       rgba(255,255,255,0.26);
  --text-4:       rgba(255,255,255,0.1);
  --font:         'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'Space Mono', monospace;
  --r-sm:   8px;
  --r-md:   12px;
  --r-lg:   16px;
  --r-xl:   20px;
  --r-full: 999px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

#grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.018) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 100% 60% at 50% 0%, black 20%, transparent 100%);
}
#scan-line { display: none; }

/* ── Screens ─────────────────────────────────────────────── */
.screen {
  display: none !important;
  position: relative;
  z-index: 2;
  min-height: 100dvh;
}
.screen.active { display: block !important; }
#auth-screen.active { display: flex !important; }

/* ── AUTH ────────────────────────────────────────────────── */
#auth-screen {
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(0,212,170,0.05) 0%, transparent 70%);
}

.auth-container {
  width: 100%;
  max-width: 400px;
  background: var(--bg2);
  border: 0.5px solid var(--border);
  border-radius: var(--r-xl);
  padding: 40px 36px;
  box-shadow: 0 0 0 0.5px var(--border2), 0 32px 80px rgba(0,0,0,0.7);
}

.logo-block {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 36px;
}
.logo-hex {
  width: 46px; height: 46px;
  background: var(--accent-soft);
  border: 0.5px solid var(--accent-mid);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.hex-svg { width: 26px; height: 26px; }
.logo-text { display: flex; flex-direction: column; gap: 2px; }
.logo-main {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text);
}
.logo-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--text-3);
}

.auth-tabs {
  display: flex;
  background: var(--surface);
  border-radius: var(--r-md);
  padding: 3px;
  margin-bottom: 28px;
}
.tab-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-2);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  padding: 8px;
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.2s;
}
.tab-btn.active {
  background: var(--surface3);
  color: var(--text);
  box-shadow: 0 1px 4px rgba(0,0,0,0.5);
}

.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form.hidden { display: none; }

.field-group { display: flex; flex-direction: column; gap: 6px; }
.field-group label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-2);
}
.field-group input {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  padding: 11px 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
}
.field-group input::placeholder { color: var(--text-3); }
.field-group input:focus {
  border-color: var(--accent-mid);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.cta-btn {
  background: var(--accent);
  border: none;
  border-radius: var(--r-sm);
  color: #000;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  padding: 12px;
  cursor: pointer;
  margin-top: 6px;
  transition: all 0.15s;
}
.cta-btn:hover {
  background: #00f0c0;
  box-shadow: 0 6px 24px rgba(0,212,170,0.22);
  transform: translateY(-1px);
}
.cta-btn:active { transform: translateY(0); }

.auth-msg {
  font-size: 12px;
  min-height: 16px;
  color: var(--danger);
  text-align: center;
}
.auth-msg.ok { color: var(--success); }

/* ── HEADER ──────────────────────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 56px;
  background: rgba(0,0,0,0.82);
  border-bottom: 0.5px solid var(--border);
  backdrop-filter: blur(24px);
  position: sticky;
  top: 0; z-index: 100;
}
.header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
}
.header-right { display: flex; align-items: center; gap: 10px; }
.header-user { font-size: 13px; color: var(--text-2); }
.icon-btn {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-2);
  width: 32px; height: 32px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  transition: all 0.15s;
}
.icon-btn:hover { background: var(--surface2); color: var(--text); }

/* ── DASHBOARD ───────────────────────────────────────────── */
.dashboard-main {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.dashboard-hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 0.5px solid var(--border2);
}
.hero-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.hero-text h1 {
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  line-height: 1;
}
.hero-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--success);
  margin-top: 10px;
}
.hero-status::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2.5s ease infinite;
}
@keyframes pulse {
  0%,100% { opacity:1; }
  50% { opacity: 0.3; }
}

.hero-stats { display: flex; gap: 10px; flex-wrap: wrap; }
.stat-chip {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-lg);
  padding: 14px 18px;
  min-width: 88px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}
.stat-n {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat-l {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-3);
  text-transform: uppercase;
}

.section { display: flex; flex-direction: column; gap: 16px; }
.section-header { display: flex; align-items: center; gap: 10px; }
.section-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-4);
}
.section-header h2 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-3);
  text-transform: uppercase;
}

/* ── FOCUS GRID ──────────────────────────────────────────── */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
}
.focus-card {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-lg);
  padding: 16px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  text-align: center;
  transition: all 0.15s;
}
.focus-card:hover {
  background: var(--surface2);
  border-color: var(--border-hover);
}
.focus-card.active {
  background: var(--accent-soft);
  border-color: var(--accent-mid);
}
.focus-icon {
  font-size: 17px;
  color: var(--text-3);
  line-height: 1;
  margin-bottom: 2px;
}
.focus-card.active .focus-icon { color: var(--accent); }
.focus-name {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text);
}
.focus-desc {
  font-size: 10px;
  color: var(--text-3);
  line-height: 1.4;
}

/* ── DURATION ────────────────────────────────────────────── */
.duration-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.dur-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-3);
  white-space: nowrap;
}
.dur-options { display: flex; gap: 6px; }
.dur-btn {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-full);
  color: var(--text-2);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 500;
  padding: 7px 16px;
  cursor: pointer;
  transition: all 0.15s;
}
.dur-btn:hover { color: var(--text); border-color: var(--border-hover); }
.dur-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent-mid);
  color: var(--accent);
}

.launch-btn {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-lg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.2s;
  align-self: flex-start;
  min-width: 220px;
}
.launch-btn:hover {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  box-shadow: 0 6px 28px rgba(0,212,170,0.18);
  transform: translateY(-1px);
}
.launch-btn:active { transform: translateY(0); }

/* ── MUSCLE STATUS ───────────────────────────────────────── */
.muscle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
}
.muscle-chip {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-lg);
  padding: 14px;
}
.muscle-chip-name {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 3px;
  color: var(--text-2);
}
.muscle-chip-days {
  font-size: 11px;
  color: var(--text-3);
  margin-bottom: 10px;
}
.ready .muscle-chip-name { color: var(--success); }
.ready { border-color: rgba(48,209,88,0.18); }
.warn .muscle-chip-name { color: var(--warn); }
.warn { border-color: rgba(255,159,10,0.18); }
.resting .muscle-chip-name { color: var(--text-3); }

.ready-bar {
  height: 2px;
  background: var(--surface3);
  border-radius: var(--r-full);
  overflow: hidden;
}
.ready-bar-fill {
  height: 100%;
  border-radius: var(--r-full);
  transition: width 0.6s ease;
}
.ready .ready-bar-fill { background: var(--success); }
.warn  .ready-bar-fill { background: var(--warn); }
.resting .ready-bar-fill { background: var(--surface3); }

/* ── HISTORY ─────────────────────────────────────────────── */
.history-list { display: flex; flex-direction: column; gap: 6px; }
.history-item {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all 0.15s;
}
.history-item:hover {
  background: var(--surface2);
  border-color: var(--border-hover);
}
.history-date {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  min-width: 70px;
}
.history-focus {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  flex: 1;
}
.history-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--r-full);
  background: var(--surface2);
  color: var(--text-3);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.history-badge.done {
  background: var(--success-soft);
  color: var(--success);
}

.empty-state {
  font-size: 13px;
  color: var(--text-3);
  text-align: center;
  padding: 40px;
}

/* ── WORKOUT ─────────────────────────────────────────────── */
#workout-screen { background: var(--bg); }

.workout-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 60px;
  background: rgba(0,0,0,0.85);
  border-bottom: 0.5px solid var(--border);
  backdrop-filter: blur(24px);
  position: sticky;
  top: 0; z-index: 100;
  gap: 12px;
}
.back-btn {
  background: var(--danger-soft);
  border: 0.5px solid rgba(255,69,58,0.2);
  border-radius: var(--r-sm);
  color: var(--danger);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 500;
  padding: 7px 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
  white-space: nowrap;
}
.back-btn:hover { background: rgba(255,69,58,0.16); }

.workout-title-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}
.wk-focus {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text-3);
  text-transform: uppercase;
}
.wk-timer {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.complete-btn {
  background: var(--success-soft);
  border: 0.5px solid rgba(48,209,88,0.25);
  border-radius: var(--r-sm);
  color: var(--success);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  padding: 7px 14px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.complete-btn:hover { background: rgba(48,209,88,0.18); }

.workout-progress-bar { height: 1px; background: var(--surface); }
.workout-progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.5s ease;
}

.workout-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 16px 80px;
}

/* ── EXERCISE CARDS ──────────────────────────────────────── */
.exercise-list { display: flex; flex-direction: column; gap: 10px; }

.exercise-card {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color 0.2s;
}
.exercise-card.active-exercise {
  border-color: rgba(0,212,170,0.28);
}
.exercise-card.done-exercise {
  opacity: 0.45;
  border-color: rgba(48,209,88,0.12);
}

.ex-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
}
.ex-number {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-4);
  min-width: 22px;
}
.ex-info { flex: 1; min-width: 0; }
.ex-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ex-meta {
  font-size: 11px;
  color: var(--text-3);
  margin-top: 2px;
}
.ex-muscle-tag {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: var(--r-full);
  background: var(--accent-soft);
  color: var(--accent);
  flex-shrink: 0;
}
.ex-chevron {
  font-size: 11px;
  color: var(--text-4);
  transition: transform 0.2s;
  flex-shrink: 0;
}
.exercise-card.expanded .ex-chevron { transform: rotate(180deg); }

.ex-body {
  display: none;
  border-top: 0.5px solid var(--border2);
  padding: 14px 16px;
}
.exercise-card.expanded .ex-body { display: block; }

.sets-table { width: 100%; border-collapse: collapse; }
.sets-table th {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-4);
  padding: 0 8px 10px;
  text-align: left;
  text-transform: uppercase;
}
.sets-table td { padding: 5px 8px; vertical-align: middle; }
.set-row { transition: background 0.1s; }
.set-row:hover { background: var(--surface2); }
.set-row.completed td { opacity: 0.4; }

.set-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  width: 28px;
}
.set-input {
  background: var(--bg3);
  border: 0.5px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  padding: 7px 10px;
  width: 72px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  text-align: center;
  -moz-appearance: textfield;
}
.set-input::-webkit-inner-spin-button,
.set-input::-webkit-outer-spin-button { -webkit-appearance: none; }
.set-input:focus {
  border-color: var(--accent-mid);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.set-log-btn {
  background: var(--surface2);
  border: 0.5px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-2);
  font-family: var(--font);
  font-size: 11px;
  font-weight: 500;
  padding: 7px 14px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.set-log-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent-mid);
  color: var(--accent);
}
.set-log-btn.logged {
  background: var(--success-soft);
  border-color: rgba(48,209,88,0.25);
  color: var(--success);
}
.rest-info {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-3);
  padding: 10px 0 0;
}
.rest-info-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
  flex-shrink: 0;
}

/* ── REST OVERLAY ────────────────────────────────────────── */
.rest-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(20px);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}
.rest-overlay.hidden { display: none; }

.rest-modal {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 40px 36px;
  background: var(--bg2);
  border: 0.5px solid var(--border);
  border-radius: var(--r-xl);
  text-align: center;
  box-shadow: 0 32px 80px rgba(0,0,0,0.7);
  min-width: 260px;
}
.rest-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}
.rest-circle {
  position: relative;
  width: 130px; height: 130px;
}
.rest-svg { width: 100%; height: 100%; }
.rest-countdown {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 44px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.rest-next {
  font-size: 13px;
  color: var(--text-2);
  max-width: 200px;
}
.skip-btn {
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: var(--r-full);
  color: var(--text-2);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 500;
  padding: 8px 22px;
  cursor: pointer;
  transition: all 0.15s;
}
.skip-btn:hover {
  background: var(--surface2);
  color: var(--text);
  border-color: var(--border-hover);
}

/* ── LOADING / TOAST ─────────────────────────────────────── */
.loading-spinner {
  display: inline-block;
  width: 13px; height: 13px;
  border: 2px solid rgba(255,255,255,0.12);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  vertical-align: middle;
  margin-right: 7px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.toast {
  position: fixed;
  bottom: 24px; right: 24px;
  background: var(--surface2);
  border: 0.5px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  padding: 12px 18px;
  z-index: 9999;
  animation: toastIn 0.25s ease;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  backdrop-filter: blur(20px);
}
.toast.warn { color: var(--warn); border-color: rgba(255,159,10,0.18); }
.toast.success { color: var(--success); border-color: rgba(48,209,88,0.18); }
@keyframes toastIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── MOBILE ──────────────────────────────────────────────── */
@media (max-width: 600px) {
  .auth-container { padding: 32px 22px; }
  .dashboard-main { padding: 28px 14px 60px; }
  .focus-grid { grid-template-columns: repeat(3, 1fr); }
  .workout-header { padding: 0 12px; height: 54px; }
  .wk-timer { font-size: 17px; }
  .back-btn, .complete-btn { font-size: 11px; padding: 7px 10px; }
}