:root {
  --bg: #0f1117;
  --bg2: #1a1d27;
  --card: #1e2130;
  --card-border: #2a2d3e;
  --accent: #6c63ff;
  --accent2: #a78bfa;
  --accent-glow: rgba(108,99,255,0.25);
  --green: #10b981;
  --red: #ef4444;
  --yellow: #f59e0b;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --text3: #64748b;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

.bg-gradient {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 10%, rgba(108,99,255,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(167,139,250,0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

header {
  text-align: center;
  padding: 1.5rem 0 0.5rem;
}

header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #a78bfa, #6c63ff, #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.subtitle {
  color: var(--text2);
  margin-top: 0.35rem;
  font-size: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.card-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text3);
  margin-bottom: 0.75rem;
}

.card-hint {
  font-size: 0.85rem;
  color: var(--text2);
  margin-top: -0.75rem;
  margin-bottom: 1.25rem;
}

/* Mode Toggle */
.mode-toggle-card { padding: 1.25rem; }

.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--card-border);
  background: var(--bg2);
  color: var(--text2);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.mode-btn:hover { border-color: var(--accent); color: var(--text); }

.mode-btn.active {
  border-color: var(--accent);
  background: var(--accent-glow);
  color: var(--text);
  box-shadow: 0 0 0 1px var(--accent);
}

.mode-icon { font-size: 1.5rem; }
.mode-title { font-weight: 700; font-size: 0.95rem; }
.mode-desc { font-size: 0.75rem; color: var(--text3); }
.mode-btn.active .mode-desc { color: var(--text2); }

/* Sections */
.section-wrapper { display: contents; }
.hidden { display: none !important; }

/* Gender Toggle */
.gender-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.gender-btn {
  padding: 0.6rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--card-border);
  background: var(--bg2);
  color: var(--text2);
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.gender-btn:hover { border-color: var(--accent2); color: var(--text); }

.gender-btn.active {
  border-color: var(--accent);
  background: var(--accent-glow);
  color: var(--text);
}

/* Fields */
.fields-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label, .field-group > label, .comp-field > label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.input-wrap {
  display: flex;
  align-items: center;
  background: var(--bg2);
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.2s;
}

.input-wrap:focus-within { border-color: var(--accent); }

.input-wrap input[type=number] {
  flex: 1;
  padding: 0.6rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  font-weight: 600;
  outline: none;
  min-width: 0;
}

.input-wrap input[type=number]::-webkit-outer-spin-button,
.input-wrap input[type=number]::-webkit-inner-spin-button { -webkit-appearance: none; }

.unit {
  padding: 0 0.75rem;
  color: var(--text3);
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
}

.input-wrap.slim { min-width: 80px; }
.input-wrap.slim input { padding: 0.4rem 0.5rem; font-size: 0.9rem; }
.input-wrap.slim .unit { padding: 0 0.5rem; font-size: 0.8rem; }

/* Field Group */
.field-group { margin-bottom: 1.25rem; }
.field-group > label { display: block; margin-bottom: 0.6rem; }
.field-group.sub { margin-top: 0.75rem; margin-bottom: 0; }

/* Radio cards */
.radio-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.radio-group.horizontal {
  flex-direction: row;
  gap: 0.5rem;
}

.radio-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--card-border);
  background: var(--bg2);
  cursor: pointer;
  transition: all 0.18s;
  user-select: none;
}

.radio-card:hover { border-color: var(--accent2); }

.radio-card input[type=radio] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.radio-card:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.radio-icon { font-size: 1.1rem; flex-shrink: 0; }
.radio-content { display: flex; flex-direction: column; gap: 0.15rem; }
.radio-text { font-size: 0.88rem; font-weight: 500; }
.radio-hint { font-size: 0.77rem; color: var(--text3); line-height: 1.4; }
.radio-card:has(input:checked) .radio-hint { color: var(--text2); }

.intensity-hint-box {
  margin-top: 0.6rem;
  padding: 0.6rem 0.85rem;
  background: var(--bg2);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.82rem;
  color: var(--text2);
  line-height: 1.5;
  min-height: 2.5rem;
}

.radio-card.small {
  flex: 1;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.75rem;
}

.radio-card.small input { display: none; }
.radio-card.small:has(input:checked) { border-color: var(--accent); background: var(--accent-glow); }

/* Card title row with inline toggle */
.card-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.card-title-row .card-title { margin-bottom: 0; }

.comp-unit-toggle {
  display: flex;
  border: 1.5px solid var(--card-border);
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}

.comp-unit-btn {
  padding: 0.3rem 0.75rem;
  border: none;
  background: var(--bg2);
  color: var(--text2);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all 0.18s;
  white-space: nowrap;
}

.comp-unit-btn + .comp-unit-btn {
  border-left: 1.5px solid var(--card-border);
}

.comp-unit-btn:hover { color: var(--text); }

.comp-unit-btn.active {
  background: var(--accent);
  color: #fff;
}

/* Composition */
.composition-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.comp-field { display: flex; flex-direction: column; gap: 0.4rem; }

.slider-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.slider-row input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 99px;
  background: var(--card-border);
  outline: none;
  cursor: pointer;
}

.slider-row input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  cursor: pointer;
  transition: box-shadow 0.15s;
}

.slider-row input[type=range]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 6px var(--accent-glow);
}

/* Composition Bar */
.composition-bar-wrap { margin-top: 0.5rem; }

.composition-bar {
  display: flex;
  height: 36px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--card-border);
}

.bar-segment {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: width 0.4s ease;
  font-size: 0.7rem;
  font-weight: 600;
  color: rgba(255,255,255,0.8);
}

.bar-segment span { white-space: nowrap; overflow: hidden; text-overflow: clip; }

.bar-fat { background: #ef4444; }
.bar-muscle { background: #10b981; }
.bar-water { background: #3b82f6; }
.bar-bone { background: #f59e0b; }
.bar-other { background: #6b7280; }

.comp-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.6rem;
  font-size: 0.78rem;
  color: var(--text2);
  align-items: center;
}

.legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  margin-right: 0.25rem;
}

.legend-dot.fat { background: #ef4444; }
.legend-dot.muscle { background: #10b981; }
.legend-dot.water { background: #3b82f6; }
.legend-dot.bone { background: #f59e0b; }
.legend-dot.other { background: #6b7280; }

/* Training */
.training-display {
  font-weight: 700;
  color: var(--accent2);
  min-width: 90px;
  font-size: 0.9rem;
  text-align: right;
}

/* Goal Warning */
.goal-warning {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  border-left: 3px solid;
}

.goal-warning.warn {
  background: rgba(245,158,11,0.1);
  border-color: var(--yellow);
  color: var(--yellow);
}

.goal-warning.ok {
  background: rgba(16,185,129,0.1);
  border-color: var(--green);
  color: var(--green);
}

.goal-warning.bad {
  background: rgba(239,68,68,0.1);
  border-color: var(--red);
  color: var(--red);
}

/* Results */
.results-card {
  border-color: var(--accent);
  box-shadow: 0 0 30px rgba(108,99,255,0.15), var(--shadow);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.result-box {
  background: var(--bg2);
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
}

.result-box.primary {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.result-box.goal-box { border-color: var(--green); background: rgba(16,185,129,0.08); }
.result-box.goal-box.deficit { border-color: var(--green); background: rgba(16,185,129,0.08); }
.result-box.goal-box.surplus { border-color: var(--yellow); background: rgba(245,158,11,0.08); }

.result-label { font-size: 0.75rem; font-weight: 600; color: var(--text2); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.4rem; }
.result-value { font-size: 1.8rem; font-weight: 800; color: var(--text); line-height: 1; }
.result-box.primary .result-value { color: var(--accent2); }
.result-sub { font-size: 0.72rem; color: var(--text3); margin-top: 0.3rem; }

/* Detail grid */
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.detail-item {
  background: var(--bg2);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.detail-label { font-size: 0.8rem; color: var(--text2); }
.detail-value { font-size: 0.88rem; font-weight: 700; color: var(--text); white-space: nowrap; }

/* Macros */
.macro-section h3 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text2);
  margin-bottom: 0.75rem;
}

.macro-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.macro-box {
  border-radius: var(--radius-sm);
  padding: 1rem 0.75rem;
  text-align: center;
  border: 1.5px solid;
}

.macro-box.protein { border-color: rgba(239,68,68,0.4); background: rgba(239,68,68,0.07); }
.macro-box.carbs { border-color: rgba(245,158,11,0.4); background: rgba(245,158,11,0.07); }
.macro-box.fat { border-color: rgba(16,185,129,0.4); background: rgba(16,185,129,0.07); }

.macro-icon { font-size: 1.3rem; margin-bottom: 0.25rem; }
.macro-label { font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text2); margin-bottom: 0.3rem; }
.macro-value { font-size: 1.2rem; font-weight: 800; }
.macro-box.protein .macro-value { color: #f87171; }
.macro-box.carbs .macro-value { color: #fbbf24; }
.macro-box.fat .macro-value { color: #34d399; }
.macro-kcal { font-size: 0.75rem; color: var(--text3); margin-top: 0.15rem; }

/* Formula note */
.formula-note {
  font-size: 0.78rem;
  color: var(--text3);
  text-align: center;
  padding-top: 0.5rem;
  border-top: 1px solid var(--card-border);
  margin-top: 0.75rem;
}

/* Animations */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.card { animation: fadeSlideIn 0.3s ease; }

/* Responsive */
@media (max-width: 560px) {
  .result-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .macro-grid { grid-template-columns: 1fr; }
  header h1 { font-size: 1.7rem; }
}

@media (max-width: 400px) {
  .mode-toggle { grid-template-columns: 1fr; }
}