/* ================================================================
   HOW MANY PEOPLE SHARE YOUR BIRTHDAY — Stylesheet
   Branding identical to: age-calculator, older-than-you,
   birthday-population, what-number-human tools
   All selectors scoped to #syb-root to avoid WordPress conflicts
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:wght@300;400;500;600&family=DM+Mono:wght@400;500&display=swap');

/* ── Reset ── */
#syb-root *,
#syb-root *::before,
#syb-root *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Root / Variables ── */
#syb-root {
  /* Shared brand palette — identical across all tools */
  --bg:          #eef2f7;
  --card:        #ffffff;
  --border:      #b0c4de;
  --shadow:      0 2px 16px rgba(10,61,122,0.08);
  --shadow-lg:   0 8px 40px rgba(10,61,122,0.14);
  --blue-dark:   #0a3d7a;
  --blue-mid:    #1565c0;
  --blue-light:  #0288d1;
  --red:         #c62828;
  --teal:        #00897b;
  --orange:      #f57c00;
  --purple:      #7b1fa2;
  --green:       #2e7d32;
  --navy:        #1a2332;
  --label:       #4a5568;
  --white:       #ffffff;
  --radius:      14px;
  --radius-sm:   9px;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body:    'DM Sans', Arial, Helvetica, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', Courier, monospace;

  font-family: var(--font-body);
  color: var(--navy);
  background: var(--bg);
  padding: 20px 14px 36px;
  min-width: 280px;
  isolation: isolate;
}

/* ── Layout ── */
#syb-root .syb-wrap {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ══════════════════════════════
   HERO
══════════════════════════════ */
#syb-root .syb-hero {
  background: var(--blue-dark);
  border-radius: var(--radius);
  padding: 30px 28px;
  color: var(--white);
  position: relative;
  overflow: hidden;
}
#syb-root .syb-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 15%, rgba(255,255,255,0.07) 0%, transparent 52%),
    radial-gradient(circle at 10% 85%, rgba(2,136,209,0.18) 0%, transparent 48%);
  pointer-events: none;
}
#syb-root .syb-hero::after {
  content: '';
  position: absolute;
  right: -55px;
  top: -55px;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.09);
  box-shadow:
    0 0 0 38px rgba(255,255,255,0.03),
    0 0 0 76px rgba(255,255,255,0.015);
  pointer-events: none;
}
#syb-root .syb-hero-inner   { position: relative; z-index: 1; }
#syb-root .syb-hero-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  margin-bottom: 8px;
}
#syb-root .syb-hero-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 5vw, 28px);
  line-height: 1.2;
  font-weight: 400;
  color: var(--white);
  margin-bottom: 10px;
}
#syb-root .syb-hero-sub {
  font-size: 14px;
  color: rgba(255,255,255,0.85);
  font-weight: 300;
  max-width: 500px;
  line-height: 1.65;
}

/* ══════════════════════════════
   CARD
══════════════════════════════ */
#syb-root .syb-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}
#syb-root .syb-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 18px;
}

/* ══════════════════════════════
   FORM
══════════════════════════════ */
#syb-root .syb-fields {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}
#syb-root .syb-field { display: flex; flex-direction: column; gap: 5px; }
#syb-root .syb-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #2d3748;
}
#syb-root .syb-label-opt {
  font-weight: 400;
  opacity: 0.6;
  text-transform: none;
  letter-spacing: 0;
  font-size: 10px;
}
#syb-root .syb-note {
  display: block;
  font-size: 12px;
  color: var(--label);
  font-style: italic;
  margin-top: 10px;
}
#syb-root .syb-input,
#syb-root .syb-select {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  background: #f0f4f9;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  outline: none;
  width: 100%;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
  appearance: none;
}
#syb-root .syb-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7'%3E%3Cpath fill='%232d3748' d='M6 7L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
  cursor: pointer;
}
#syb-root .syb-input:focus,
#syb-root .syb-select:focus {
  border-color: var(--blue-dark);
  box-shadow: 0 0 0 3px rgba(10,61,122,0.12);
  background: var(--white);
}
#syb-root .syb-input.syb-error {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(198,40,40,0.10);
}
#syb-root .syb-err-msg {
  font-size: 11px;
  color: var(--red);
  font-weight: 700;
  min-height: 14px;
}

/* ── Primary button ── */
#syb-root .syb-btn {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  background: var(--blue-dark);
  border: none;
  border-radius: var(--radius-sm);
  padding: 13px 26px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  transition: transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(10,61,122,0.28);
}
#syb-root .syb-btn:hover  { transform: translateY(-1px); box-shadow: 0 6px 22px rgba(10,61,122,0.38); }
#syb-root .syb-btn:active { transform: translateY(0); }

/* ── Ghost button ── */
#syb-root .syb-btn-ghost {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  color: var(--blue-dark);
  background: transparent;
  border: 2px solid var(--blue-dark);
  border-radius: var(--radius-sm);
  padding: 9px 18px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.2s;
}
#syb-root .syb-btn-ghost:hover { background: rgba(10,61,122,0.07); }

/* ══════════════════════════════
   RESULTS WRAPPER
══════════════════════════════ */
#syb-root .syb-result { display: none; flex-direction: column; gap: 18px; }
#syb-root .syb-result.syb-visible { display: flex; }

/* ══════════════════════════════
   MAIN BANNER
══════════════════════════════ */
#syb-root .syb-banner {
  background: var(--blue-dark);
  border-radius: var(--radius);
  padding: 30px 28px;
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}
#syb-root .syb-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(255,255,255,0.08) 0%, transparent 65%);
  pointer-events: none;
}
#syb-root .syb-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}
#syb-root .syb-banner-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
#syb-root .syb-banner-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 46px);
  font-weight: 500;
  letter-spacing: -1px;
  line-height: 1;
  color: var(--white);
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}
#syb-root .syb-banner-date {
  font-size: 14px;
  color: rgba(255,255,255,0.78);
  font-weight: 300;
  position: relative;
  z-index: 1;
}

/* ══════════════════════════════
   SPLIT: ALIVE / ALL-TIME
══════════════════════════════ */
#syb-root .syb-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
#syb-root .syb-split-half {
  border-radius: var(--radius);
  padding: 24px 20px;
  color: var(--white);
  position: relative;
  overflow: hidden;
  text-align: center;
}
#syb-root .syb-split-half::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(255,255,255,0.09) 0%, transparent 65%);
  pointer-events: none;
}
#syb-root .syb-split-blue { background: var(--blue-dark); }
#syb-root .syb-split-teal { background: var(--teal); }
#syb-root .syb-split-eyebrow {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}
#syb-root .syb-split-num {
  font-family: var(--font-mono);
  font-size: clamp(18px, 4vw, 28px);
  font-weight: 500;
  line-height: 1;
  margin-bottom: 6px;
  position: relative;
  z-index: 1;
}
#syb-root .syb-split-lbl {
  font-size: 12px;
  color: rgba(255,255,255,0.80);
  font-weight: 300;
  position: relative;
  z-index: 1;
  line-height: 1.4;
}

/* ══════════════════════════════
   STATS GRID
══════════════════════════════ */
#syb-root .syb-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}
#syb-root .syb-stat {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 14px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}
#syb-root .syb-stat:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
#syb-root .syb-stat-accent {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
}
#syb-root .syb-stat:nth-child(1) .syb-stat-accent { background: var(--blue-dark); }
#syb-root .syb-stat:nth-child(2) .syb-stat-accent { background: var(--orange); }
#syb-root .syb-stat:nth-child(3) .syb-stat-accent { background: var(--teal); }
#syb-root .syb-stat:nth-child(4) .syb-stat-accent { background: var(--purple); }
#syb-root .syb-stat:nth-child(5) .syb-stat-accent { background: var(--red); }
#syb-root .syb-stat:nth-child(6) .syb-stat-accent { background: var(--green); }
#syb-root .syb-stat-icon { font-size: 16px; margin-bottom: 4px; display: block; line-height: 1; }
#syb-root .syb-stat-val {
  font-family: var(--font-mono);
  font-size: clamp(12px, 2.5vw, 16px);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
  display: block;
}
#syb-root .syb-stat-lbl {
  font-size: 11px;
  color: var(--label);
  font-weight: 700;
  display: block;
}

/* ══════════════════════════════
   FREQUENCY COMPARISON BAR
══════════════════════════════ */
#syb-root .syb-freq-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 24px;
}
#syb-root .syb-section-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
#syb-root .syb-section-title span { font-size: 16px; }
#syb-root .syb-freq-row {
  display: grid;
  grid-template-columns: 110px 1fr 80px;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
#syb-root .syb-freq-lbl { font-size: 12px; font-weight: 700; color: var(--navy); }
#syb-root .syb-freq-track {
  background: #e0e8f0;
  border: 1px solid var(--border);
  border-radius: 100px;
  height: 10px;
  overflow: hidden;
}
#syb-root .syb-freq-fill {
  height: 100%;
  border-radius: 100px;
  transition: width 1.2s cubic-bezier(0.16,1,0.3,1);
}
#syb-root .syb-fill-you { background: var(--blue-dark); }
#syb-root .syb-fill-avg { background: var(--label); }
#syb-root .syb-fill-max { background: var(--orange); }
#syb-root .syb-freq-val {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--label);
  text-align: right;
}
#syb-root .syb-freq-note {
  font-size: 12px;
  color: var(--label);
  font-weight: 600;
  margin-top: 6px;
  font-style: italic;
}

/* ══════════════════════════════
   MONTH BREAKDOWN
══════════════════════════════ */
#syb-root .syb-month-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 24px;
}
#syb-root .syb-months { display: flex; flex-direction: column; gap: 7px; }
#syb-root .syb-month-row {
  display: grid;
  grid-template-columns: 90px 1fr 60px;
  align-items: center;
  gap: 10px;
}
#syb-root .syb-month-name { font-size: 12px; font-weight: 700; color: var(--navy); }
#syb-root .syb-month-name.syb-your-month { color: var(--orange); }
#syb-root .syb-month-track {
  background: #e0e8f0;
  border: 1px solid var(--border);
  border-radius: 100px;
  height: 7px;
  overflow: hidden;
}
#syb-root .syb-month-fill {
  height: 100%;
  border-radius: 100px;
  background: var(--blue-dark);
  transition: width 1.2s cubic-bezier(0.16,1,0.3,1);
  width: 0%;
}
#syb-root .syb-month-fill.syb-your-month-fill { background: var(--orange); }
#syb-root .syb-month-pop {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--label);
  font-weight: 700;
  text-align: right;
}

/* ══════════════════════════════
   FAMOUS PEOPLE CARD
══════════════════════════════ */
#syb-root .syb-famous-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 24px;
}
#syb-root .syb-famous-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
#syb-root .syb-famous-item {
  background: #f0f4f9;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
#syb-root .syb-famous-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
}
#syb-root .syb-famous-desc {
  font-size: 11px;
  color: var(--label);
  font-weight: 600;
}
#syb-root .syb-famous-year {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--blue-dark);
  font-weight: 700;
  margin-top: 2px;
}

/* ══════════════════════════════
   CONTEXT CARD
══════════════════════════════ */
#syb-root .syb-context-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 24px;
}
#syb-root .syb-context-text {
  font-size: 14px;
  color: var(--label);
  line-height: 1.78;
}
#syb-root .syb-hl      { color: var(--blue-dark); font-weight: 700; }
#syb-root .syb-hl-teal { color: var(--teal);      font-weight: 700; }
#syb-root .syb-hl-org  { color: var(--orange);    font-weight: 700; }
#syb-root .syb-hl-grn  { color: var(--green);     font-weight: 700; }

/* ══════════════════════════════
   PROBABILITY PAIR
══════════════════════════════ */
#syb-root .syb-prob-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
#syb-root .syb-prob-box {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
#syb-root .syb-prob-lbl {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #2d3748;
}
#syb-root .syb-prob-val {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.1;
}
#syb-root .syb-prob-sub { font-size: 12px; color: var(--label); font-weight: 600; }

/* ══════════════════════════════
   ACTION ROW + FOOTNOTE
══════════════════════════════ */
#syb-root .syb-action-row { display: flex; gap: 10px; flex-wrap: wrap; }
#syb-root .syb-footnote {
  text-align: center;
  font-size: 12px;
  color: var(--label);
  font-weight: 600;
  line-height: 1.65;
}

/* ══════════════════════════════
   ANIMATIONS
══════════════════════════════ */
@keyframes syb-fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
#syb-root .syb-anim { animation: syb-fade-up 0.55s cubic-bezier(0.16,1,0.3,1) both; }
#syb-root .syb-d1   { animation-delay: 0.05s; }
#syb-root .syb-d2   { animation-delay: 0.12s; }
#syb-root .syb-d3   { animation-delay: 0.19s; }
#syb-root .syb-d4   { animation-delay: 0.26s; }
#syb-root .syb-d5   { animation-delay: 0.33s; }

/* ══════════════════════════════
   RESPONSIVE
══════════════════════════════ */
@media (max-width: 580px) {
  #syb-root .syb-card,
  #syb-root .syb-freq-card,
  #syb-root .syb-month-card,
  #syb-root .syb-famous-card,
  #syb-root .syb-context-card { padding: 20px 18px; }
  #syb-root .syb-hero    { padding: 28px 22px 24px; }
  #syb-root .syb-banner  { padding: 26px 20px; }
  #syb-root .syb-fields  { grid-template-columns: 1fr 1fr; }
  #syb-root .syb-stats   { grid-template-columns: 1fr 1fr; }
  #syb-root .syb-stat:last-child:nth-child(odd) { grid-column: 1 / -1; }
  #syb-root .syb-freq-row   { grid-template-columns: 90px 1fr 65px; }
  #syb-root .syb-month-row  { grid-template-columns: 76px 1fr 52px; }
}
@media (max-width: 420px) {
  #syb-root .syb-fields      { grid-template-columns: 1fr; }
  #syb-root .syb-stats       { grid-template-columns: 1fr; }
  #syb-root .syb-split       { grid-template-columns: 1fr; }
  #syb-root .syb-famous-list { grid-template-columns: 1fr; }
  #syb-root .syb-prob-pair   { grid-template-columns: 1fr; }
  #syb-root .syb-freq-row    { grid-template-columns: 80px 1fr 55px; gap: 6px; }
  #syb-root .syb-month-row   { grid-template-columns: 70px 1fr 46px; gap: 6px; }
}