:root {
  color-scheme: dark;
  --background: #0d0f0d;
  --surface: #151815;
  --surface-2: #1b1f1a;
  --surface-3: #202420;
  --foreground: #f2f0e8;
  --muted: #9a9f97;
  --border: #30342e;
  --accent: #b8f34a;
  --accent-dark: #90c629;
  --accent-soft: rgba(184, 243, 74, 0.12);
  --series-1: #b8f34a;
  --series-2: #67d5ff;
  --series-3: #ffcc66;
  --black: #090a09;
  --shadow: 0 32px 80px rgba(0, 0, 0, 0.35);
  --radius: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--foreground);
  background:
    radial-gradient(circle at 12% 0%, rgba(184, 243, 74, 0.09), transparent 32rem),
    linear-gradient(rgba(184, 243, 74, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(184, 243, 74, 0.025) 1px, transparent 1px),
    var(--background);
  background-size: auto, 54px 54px, 54px 54px, auto;
}

button, input { font: inherit; max-width: 100%; }
.page-shell { width: min(1500px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 44px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 18px 0 28px; }
.brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 46px; height: 46px; border: 1px solid var(--accent); border-radius: 7px; color: var(--accent); background: var(--accent-soft); font-weight: 850; letter-spacing: -0.06em; }
.brand-copy strong, .brand-copy span { display: block; }
.brand-copy strong { font-size: 0.98rem; }
.brand-copy span { color: var(--muted); font-size: 0.78rem; margin-top: 2px; }
.back-link { color: var(--muted); font-size: 0.82rem; text-decoration: none; transition: color 160ms ease; }
.back-link:hover { color: var(--accent); }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 24px;
  padding: 34px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: linear-gradient(145deg, rgba(255,255,255,0.025), rgba(255,255,255,0.008));
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}
.hero::after { content: ""; position: absolute; inset: auto -10% -65% 35%; height: 360px; background: radial-gradient(circle, rgba(184, 243, 74, 0.12), transparent 68%); pointer-events: none; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-size: 0.82rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; }
h1 { margin: 0; max-width: 900px; font-size: clamp(2.15rem, 5vw, 4.7rem); line-height: 0.98; letter-spacing: -0.055em; }
.hero-intro { max-width: 760px; margin: 20px 0 0; color: #c8ccc5; font-size: clamp(1rem, 1.5vw, 1.18rem); line-height: 1.65; }
.hero-meta { position: relative; z-index: 1; display: grid; gap: 10px; padding: 18px; border: 1px solid var(--border); border-radius: 8px; background: rgba(13, 15, 13, 0.55); backdrop-filter: blur(12px); }
.hero-meta span { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: 0.82rem; }
.hero-meta strong { color: var(--foreground); font-weight: 650; }

.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-bottom: 18px; }
.card { min-width: 0; border: 1px solid var(--border); border-radius: var(--radius); background: linear-gradient(145deg, var(--surface-2), var(--surface)); box-shadow: 0 10px 35px rgba(0,0,0,0.18); }
.stat-card { padding: 18px; }
.stat-label { display: block; min-height: 2.2em; color: var(--muted); font-size: 0.78rem; line-height: 1.35; text-transform: uppercase; letter-spacing: 0.06em; }
.stat-value { display: block; margin: 10px 0 5px; font-size: clamp(1.25rem, 2.2vw, 2rem); line-height: 1; letter-spacing: -0.04em; overflow-wrap: anywhere; }
.stat-detail { color: var(--muted); font-size: 0.78rem; }

.planner-layout { display: grid; grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1.55fr); gap: 18px; align-items: start; }
.planner-layout > *, .controls, .result-panel, .control-grid, .form-label { min-width: 0; }
.controls, .result-panel { padding: 22px; }
.controls { overflow: hidden; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
h2, h3 { margin: 0; letter-spacing: -0.025em; }
h2 { font-size: 1.25rem; }
h3 { margin-top: 26px; font-size: 0.95rem; color: #d9ddd5; }
.section-hint { color: var(--muted); font-size: 0.78rem; }
.control-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; margin-top: 14px; width: 100%; }
.form-label { display: grid; gap: 7px; width: 100%; color: #c8ccc5; font-size: 0.81rem; line-height: 1.35; overflow: hidden; }
.form-control { display: block; width: 100%; min-width: 0; max-width: 100%; min-height: 46px; padding: 0 13px; border: 1px solid var(--border); border-radius: 5px; color: var(--foreground); background: var(--surface-3); outline: none; transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease; }
.form-control:focus { border-color: var(--accent); background: #232823; box-shadow: 0 0 0 3px rgba(184, 243, 74, 0.12); }

.result-top { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 20px; }
.status-badge { display: inline-flex; align-items: center; min-height: 34px; padding: 0 12px; border: 1px solid rgba(184, 243, 74, 0.38); border-radius: 999px; color: var(--accent); background: var(--accent-soft); font-size: 0.78rem; font-weight: 750; }
.status-text { color: #c8ccc5; font-size: 0.9rem; line-height: 1.45; }
.chart-wrap { position: relative; width: 100%; max-width: 100%; padding: 8px 0 0; border-radius: 8px; background: linear-gradient(180deg, rgba(255,255,255,0.012), transparent); overflow: hidden; }
.chart-wrap svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart-grid-line, .chart-axis { stroke: var(--border); stroke-width: 1; vector-effect: non-scaling-stroke; }
.chart-label { fill: var(--muted); font-size: 13px; }
.area { fill: var(--series-1); opacity: 0.1; }
.portfolio-line { fill: none; stroke: var(--series-1); stroke-width: 3; vector-effect: non-scaling-stroke; }
.contribution-line { fill: none; stroke: var(--series-2); stroke-width: 2; stroke-dasharray: 5 4; vector-effect: non-scaling-stroke; }
.target-line { stroke: var(--series-3); stroke-width: 2; stroke-dasharray: 8 5; vector-effect: non-scaling-stroke; }
.crosshair { display: none; stroke: var(--muted); stroke-width: 1; vector-effect: non-scaling-stroke; }
.portfolio-point { display: none; fill: var(--series-1); stroke: var(--background); stroke-width: 2; vector-effect: non-scaling-stroke; }
.contribution-point { display: none; fill: var(--series-2); stroke: var(--background); stroke-width: 2; vector-effect: non-scaling-stroke; }
.hit-area { fill: transparent; pointer-events: all; }
.tooltip { display: none; position: absolute; pointer-events: none; z-index: 2; max-width: min(360px, 85%); padding: 9px 11px; border: 1px solid var(--border); border-radius: 5px; color: var(--foreground); background: rgba(13, 15, 13, 0.94); box-shadow: 0 12px 30px rgba(0,0,0,0.36); font-size: 0.76rem; line-height: 1.4; backdrop-filter: blur(12px); }
.legend { display: flex; flex-wrap: wrap; gap: 11px 16px; margin-top: 10px; color: var(--muted); font-size: 0.76rem; }
.legend span { display: inline-flex; align-items: center; }
.swatch { display: inline-block; width: 22px; height: 3px; margin-right: 7px; border-radius: 10px; }
.swatch-portfolio { background: var(--series-1); }
.swatch-contribution { background: var(--series-2); }
.swatch-target { background: var(--series-3); }
.selected-detail { min-height: 1.5em; margin: 16px 0 0; color: #c3c8c1; font-size: 0.82rem; line-height: 1.45; }
.method-note { margin: 18px 0 0; padding: 16px; border-left: 2px solid var(--accent); color: var(--muted); background: rgba(184, 243, 74, 0.035); font-size: 0.78rem; line-height: 1.6; }

.planner-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 24px; padding: 24px 2px 0; color: var(--muted); font-size: 0.74rem; line-height: 1.55; }
.planner-footer-links { display: flex; flex-wrap: wrap; gap: 14px; }
.planner-footer-links a { color: var(--muted); text-decoration: none; }
.planner-footer-links a:hover { color: var(--accent); }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@media (max-width: 1120px) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .planner-layout { grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr); }
}
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding: 26px; }
  .planner-layout { grid-template-columns: minmax(0, 1fr); }
  .control-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 580px) {
  .page-shell { width: min(100% - 16px, 1500px); padding-top: 12px; }
  .site-header { padding: 10px 2px 18px; }
  .back-link { display: none; }
  .hero { padding: 22px 18px; border-radius: 8px; }
  .stats { grid-template-columns: minmax(0, 1fr); }
  .controls, .result-panel { padding: 15px; }
  .control-grid { grid-template-columns: minmax(0, 1fr); }
  .form-control, .form-control[type="date"] { width: 100%; min-width: 0; max-width: 100%; }
  .stat-label { min-height: auto; }
  .planner-footer { flex-direction: column; align-items: flex-start; gap: 8px; }
  .chart-label { font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}