/* ----- Variables ----- */
:root {
  --bg: #0f1115;
  --bg-card: #161a21;
  --bg-elevated: #1c2129;
  --border: #2a3140;
  --text: #e6e9ef;
  --text-muted: #8b92a3;
  --accent: #34d399;
  --accent-dim: rgba(52, 211, 153, 0.15);
  --alert: #f87171;
  --alert-dim: rgba(248, 113, 113, 0.12);
  --radius: 12px;
  --font: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

/* ----- Base ----- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ----- Header ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 17, 21, 0.9);
  backdrop-filter: blur(10px);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  color: var(--accent);
}

.site-header nav {
  display: flex;
  gap: 1.75rem;
}

.site-header nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.site-header nav a:hover {
  color: var(--text);
}

/* ----- Hero ----- */
.hero {
  position: relative;
  padding: 5rem 0 6rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-dim), transparent),
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(52, 211, 153, 0.06), transparent);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  text-align: center;
}

.hero-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 0 0 1.25rem;
  color: var(--text);
}

.hero-text {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 32rem;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  box-shadow: 0 8px 24px rgba(52, 211, 153, 0.35);
  text-decoration: none;
}

/* ----- Sections ----- */
.section {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.35rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 2rem;
  color: var(--text);
}

/* ----- Risk gauge ----- */
.risk-row {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1.5fr);
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

.risk-gauge {
  position: relative;
  width: 220px;
  height: 120px;
  border-radius: 120px 120px 0 0;
  background: conic-gradient(
    from 180deg,
    #16a34a 0deg,
    #16a34a 60deg,
    #fbbf24 60deg,
    #fbbf24 120deg,
    #f97316 120deg,
    #ef4444 180deg
  );
  overflow: hidden;
  border: 1px solid var(--border);
}

.risk-arc {
  position: absolute;
  inset: 35%;
  background: var(--bg);
  border-radius: 999px;
}

.risk-needle {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 2px;
  height: 90px;
  background: var(--text);
  transform-origin: bottom center;
  transform: translateX(-50%) rotate(var(--needle-rot, -15deg));
}

.risk-center {
  position: absolute;
  left: 50%;
  bottom: 0.75rem;
  transform: translateX(-50%);
  text-align: center;
}

.risk-label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.risk-score {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  margin-top: 0.25rem;
}

.risk-copy {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.risk-headline {
  margin: 0 0 0.4rem;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
}

.risk-text {
  margin: 0;
  line-height: 1.6;
}

/* ----- Cycle strip ----- */
.cycle-strip {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 48px;
  padding: 0 0.5rem;
  margin-bottom: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.phase {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  z-index: 1;
}

.phase-ovulatory {
  color: var(--alert);
  background: var(--alert-dim);
}

.cycle-marker {
  position: absolute;
  left: 18%;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
  z-index: 2;
}

.cycle-caption {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 0 2rem;
}

/* ----- Week strip ----- */
.week-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.week-day {
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.week-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.week-type {
  display: block;
  font-size: 0.85rem;
  color: var(--text);
  margin-top: 0.2rem;
}

.week-risk {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.45rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
}

.week-risk-green {
  background: rgba(22, 163, 74, 0.15);
  color: #4ade80;
}

.week-risk-yellow {
  background: rgba(245, 158, 11, 0.16);
  color: #fbbf24;
}

.week-risk-red {
  background: rgba(248, 113, 113, 0.16);
  color: #fca5a5;
}

/* ----- Cards ----- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.card {
  padding: 1.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s ease;
}

.card:hover {
  border-color: rgba(52, 211, 153, 0.3);
}

.card-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.card-value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 0.35rem;
}

.card-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.card-alert {
  border-color: rgba(248, 113, 113, 0.35);
  background: var(--alert-dim);
}

.card-alert .card-value {
  color: var(--alert);
}

.card-wide {
  grid-column: 1 / -1;
}

/* ----- Phase panel ----- */
.phase-panel {
  margin-top: 2.5rem;
  padding: 1.5rem 1.35rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.phase-panel-title {
  margin: 0 0 1.2rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.phase-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
}

.phase-column h4 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.phase-column ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.phase-column li + li {
  margin-top: 0.25rem;
}

/* ----- Features ----- */
.how {
  background: var(--bg-card);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature {
  padding: 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.feature-icon {
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  opacity: 0.9;
}

.feature h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--text);
}

.feature p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.55;
}

/* ----- Viz placeholder ----- */
.viz-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.95rem;
}

.viz-sub {
  font-size: 0.8rem;
  margin-top: 0.35rem;
  opacity: 0.7;
}

/* ----- Footer ----- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.site-footer p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

/* ----- Rule Engine ----- */
.engine {
  margin-top: 2.5rem;
  padding: 1.6rem 1.35rem;
  border: 1px solid var(--border);
  background: var(--bg-card);
  border-radius: var(--radius);
}

.engine-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.2rem;
}

.engine-title {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

.engine-subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.mode-toggle {
  display: flex;
  background: rgba(20, 24, 34, 0.6);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.mode-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.6rem 0.95rem;
  cursor: pointer;
}

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

.mode-btn.active {
  background: rgba(52, 211, 153, 0.12);
  color: var(--accent);
}

.engine-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 1rem;
}

.engine-form {
  display: grid;
  gap: 0.85rem;
}

.field {
  display: grid;
  gap: 0.35rem;
}

.field-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.field select,
.field input {
  width: 100%;
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(15, 17, 21, 0.35);
  color: var(--text);
  font-family: var(--font);
  outline: none;
}

.field select:focus,
.field input:focus {
  border-color: rgba(52, 211, 153, 0.45);
  box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.12);
}

.checkbox {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 0.45rem;
}

.checkbox input {
  width: 16px;
  height: 16px;
}

.athlete-only {
  display: block;
}

.mode-coach .athlete-only {
  display: none;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.35rem;
}

.btn-sm {
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
}

.btn-clear {
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(15, 17, 21, 0.35);
  color: var(--text-muted);
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 700;
}

.btn-clear:hover {
  border-color: rgba(52, 211, 153, 0.35);
  color: var(--text);
}

.form-status {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.engine-right .output {
  margin-bottom: 0.9rem;
}

.output-readiness {
  font-size: 2rem;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.03em;
}

.output-text {
  margin: 0.65rem 0 0;
  color: var(--text-muted);
  line-height: 1.6;
  font-size: 0.97rem;
}

.rule-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.rule-tag {
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.engine-foot {
  margin-top: 1.4rem;
}

.engine-section-title {
  margin: 0 0 0.75rem;
  font-size: 1.03rem;
  font-weight: 800;
  color: var(--text);
}

.engine-footnote {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.forecast-block,
.pattern-block {
  margin-top: 1.4rem;
}

.forecast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.7rem;
}

.forecast-day {
  padding: 0.75rem 0.8rem;
  background: rgba(15, 17, 21, 0.25);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.forecast-day .d-label {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.forecast-day .d-phase {
  margin-top: 0.25rem;
  font-weight: 700;
  color: var(--text);
  font-size: 0.95rem;
}

.forecast-day .d-readiness {
  margin-top: 0.45rem;
  font-weight: 900;
  font-size: 0.95rem;
}

.readiness-green {
  color: #4ade80;
}
.readiness-yellow {
  color: #fbbf24;
}
.readiness-red {
  color: #fca5a5;
}

.pattern-summary {
  padding: 1rem;
  background: rgba(15, 17, 21, 0.25);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

.pattern-metrics {
  display: grid;
  gap: 0.75rem;
}

.pattern-metric {
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
}

.pattern-metric-label {
  font-weight: 900;
  color: var(--text);
}

@media (max-width: 980px) {
  .engine-grid {
    grid-template-columns: 1fr;
  }
}