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

:root {
  --bg: #0a0a0f;
  --bg2: #111118;
  --bg3: #1a1a24;
  --surface: #1e1e2a;
  --surface2: #252535;
  --border: rgba(255,255,255,0.07);
  --text: #f0f0f5;
  --muted: #7a7a9a;
  --accent: #e94560;
  --accent2: #4a90e2;
  --green: #2ecc71;
  --orange: #f39c12;
  --gold: #f1c40f;
  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── NAV ──────────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: 60px;
  background: rgba(10,10,15,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
}
.nav-brand {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 2px;
  color: var(--text);
}
.nav-brand span { color: var(--accent); }
.nav-tabs {
  display: flex; gap: 4px;
}
.nav-tab {
  padding: 6px 14px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.nav-tab:hover { color: var(--text); background: var(--surface); }
.nav-tab.active { background: var(--accent); color: white; }

/* ─── LAYOUT ────────────────────────────────────────────── */
.app { padding-top: 70px; max-width: 1100px; margin: 0 auto; padding-left: 16px; padding-right: 16px; }
.view { display: none; animation: fadeUp 0.3s ease; }
.view.active { display: block; }

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

/* ─── DASHBOARD ─────────────────────────────────────────── */
.dash-header {
  padding: 28px 0 16px;
}
.dash-title {
  font-family: var(--font-display);
  font-size: 42px;
  letter-spacing: 2px;
  line-height: 1;
}
.dash-title span { color: var(--accent); }
.dash-sub { color: var(--muted); font-size: 14px; margin-top: 4px; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin: 20px 0;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
}
.stat-card.green::before { background: var(--green); }
.stat-card.blue::before { background: var(--accent2); }
.stat-card.gold::before { background: var(--gold); }
.stat-num {
  font-family: var(--font-display);
  font-size: 36px;
  letter-spacing: 1px;
  line-height: 1;
}
.stat-label { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 1px; margin-top: 4px; }

.section-title {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 2px;
  margin: 24px 0 12px;
  color: var(--muted);
}

/* ─── DAY CARDS ─────────────────────────────────────────── */
.day-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin: 16px 0;
}
.day-card {
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid var(--border);
}
.day-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.day-card-header {
  padding: 14px 12px 10px;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.day-card-icon { font-size: 24px; }
.day-card-label {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 2px;
  color: white;
}
.day-card-day { font-size: 10px; color: rgba(255,255,255,0.6); text-transform: uppercase; letter-spacing: 1px; }
.day-card-body { background: var(--surface); padding: 8px 12px 10px; }
.day-card-count { font-size: 11px; color: var(--muted); }

/* ─── WORKOUT VIEW ──────────────────────────────────────── */
.workout-header {
  display: flex; align-items: center; gap: 12px;
  padding: 20px 0 16px;
}
.back-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
  transition: all 0.2s;
}
.back-btn:hover { color: var(--text); border-color: var(--accent); }
.workout-title {
  font-family: var(--font-display);
  font-size: 32px;
  letter-spacing: 2px;
}
.workout-focus { color: var(--muted); font-size: 13px; }

.date-select-bar {
  display: flex; align-items: center; gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  margin-bottom: 16px;
}
.date-select-bar label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }
.date-select-bar input[type="date"] {
  background: transparent;
  border: none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  outline: none;
  cursor: pointer;
}

.exercise-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.exercise-card:hover { border-color: rgba(255,255,255,0.15); }
.exercise-card.warn-exercise { border-left: 3px solid var(--orange); }

.exercise-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  cursor: pointer;
}
.exercise-name-wrap { display: flex; align-items: center; gap: 8px; }
.exercise-name { font-weight: 600; font-size: 15px; }
.warn-badge {
  background: rgba(243,156,18,0.15);
  color: var(--orange);
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 20px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.exercise-meta { color: var(--muted); font-size: 12px; }
.exercise-arrow { color: var(--muted); font-size: 12px; transition: transform 0.2s; }
.exercise-card.open .exercise-arrow { transform: rotate(180deg); }

.exercise-body { display: none; padding: 0 16px 16px; }
.exercise-card.open .exercise-body { display: block; }

.suggestion-bar {
  background: rgba(46,204,113,0.08);
  border: 1px solid rgba(46,204,113,0.2);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
  font-size: 12px;
  color: var(--green);
}
.suggestion-bar .sug-weight {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
}

.sets-table { width: 100%; border-collapse: collapse; }
.sets-table th {
  text-align: left;
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 8px 8px;
}
.sets-table td { padding: 4px 6px; }
.set-row { transition: background 0.15s; border-radius: 6px; }
.set-row:hover { background: rgba(255,255,255,0.03); }
.set-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  width: 28px;
}
.set-input {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 5px 8px;
  width: 70px;
  outline: none;
  transition: border-color 0.2s;
}
.set-input:focus { border-color: var(--accent2); }
.set-input::placeholder { color: var(--muted); }
.save-set-btn {
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: white;
  font-size: 11px;
  font-weight: 600;
  padding: 5px 10px;
  cursor: pointer;
  transition: opacity 0.2s;
  letter-spacing: 0.5px;
}
.save-set-btn:hover { opacity: 0.85; }
.set-saved { color: var(--green); font-size: 11px; }

.add-set-btn {
  background: transparent;
  border: 1px dashed var(--border);
  border-radius: 8px;
  color: var(--muted);
  width: 100%;
  padding: 7px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s;
  margin-top: 8px;
}
.add-set-btn:hover { border-color: var(--accent2); color: var(--accent2); }

/* ─── PROGRESS ──────────────────────────────────────────── */
.progress-controls {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 16px;
}
.prog-select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 8px 14px;
  outline: none;
  cursor: pointer;
  min-width: 200px;
}
.chart-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.chart-title { font-family: var(--font-display); font-size: 18px; letter-spacing: 1px; color: var(--muted); margin-bottom: 16px; }
canvas { max-width: 100%; }

.pb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.pb-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  border-top: 2px solid var(--gold);
}
.pb-exercise { font-size: 13px; font-weight: 600; margin-bottom: 4px; }
.pb-value {
  font-family: var(--font-display);
  font-size: 28px;
  letter-spacing: 1px;
  color: var(--gold);
}
.pb-detail { color: var(--muted); font-size: 11px; margin-top: 2px; }

/* ─── BODY STATS ────────────────────────────────────────── */
.stats-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
}
.form-group label { display: block; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px; }
.form-input {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  padding: 8px 12px;
  width: 100%;
  outline: none;
  transition: border-color 0.2s;
}
.form-input:focus { border-color: var(--accent2); }
.save-btn {
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: white;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 20px;
  cursor: pointer;
  transition: opacity 0.2s;
  align-self: flex-end;
}
.save-btn:hover { opacity: 0.85; }

/* ─── NUTRITION ─────────────────────────────────────────── */
.macro-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}
.macro-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
}
.macro-val { font-family: var(--font-display); font-size: 30px; }
.macro-label { font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; }
.macro-card.kcal .macro-val { color: var(--accent); }
.macro-card.protein .macro-val { color: var(--accent2); }
.macro-card.carbs .macro-val { color: var(--gold); }
.macro-card.fat .macro-val { color: var(--green); }

/* ─── AI COACH ──────────────────────────────────────────── */
.ai-chat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 16px;
}
.ai-chat-header {
  background: var(--surface2);
  padding: 12px 16px;
  display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--border);
}
.ai-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
.ai-chat-title { font-weight: 600; font-size: 14px; }
.ai-chat-sub { color: var(--muted); font-size: 11px; margin-left: auto; }

.ai-messages {
  height: 320px;
  overflow-y: auto;
  padding: 16px;
  display: flex; flex-direction: column; gap: 12px;
}
.ai-messages::-webkit-scrollbar { width: 4px; }
.ai-messages::-webkit-scrollbar-track { background: transparent; }
.ai-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.msg { max-width: 80%; }
.msg.user { align-self: flex-end; }
.msg.ai { align-self: flex-start; }
.msg-bubble {
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.5;
}
.msg.user .msg-bubble { background: var(--accent); color: white; border-bottom-right-radius: 4px; }
.msg.ai .msg-bubble { background: var(--surface2); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.msg-time { font-size: 10px; color: var(--muted); margin-top: 3px; padding: 0 4px; }
.msg.user .msg-time { text-align: right; }

.typing-indicator .msg-bubble { background: var(--surface2); }
.typing-dots { display: flex; gap: 4px; align-items: center; height: 18px; }
.typing-dots span {
  width: 6px; height: 6px;
  background: var(--muted);
  border-radius: 50%;
  animation: bounce 1.2s infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce { 0%,60%,100% { transform: translateY(0); } 30% { transform: translateY(-6px); } }

.ai-input-row {
  display: flex; gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--surface2);
}
.ai-input {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 8px 12px;
  outline: none;
  transition: border-color 0.2s;
}
.ai-input:focus { border-color: var(--accent2); }
.ai-send-btn {
  background: var(--accent2);
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 16px;
  padding: 8px 14px;
  cursor: pointer;
  transition: opacity 0.2s;
}
.ai-send-btn:hover { opacity: 0.85; }
.ai-send-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.quick-prompts { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.quick-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--muted);
  font-size: 11px;
  padding: 5px 12px;
  cursor: pointer;
  transition: all 0.2s;
}
.quick-btn:hover { border-color: var(--accent2); color: var(--text); }

/* ─── TOAST ─────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px; right: 24px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.3s;
  z-index: 999;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { border-left-color: var(--accent); }

/* ─── RESPONSIVE ────────────────────────────────────────── */
@media (max-width: 700px) {
  .day-grid { grid-template-columns: repeat(3, 1fr); }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .macro-row { grid-template-columns: repeat(2, 1fr); }
  .nav-tabs .nav-tab span { display: none; }
}