:root {
  --bg-1: #08151a;
  --bg-2: #11242a;
  --surface: rgba(255, 255, 255, 0.93);
  --ink: #0c1519;
  --muted: #49606a;
  --accent: #ff6a3d;
  --accent-2: #1db8a6;
  --ok: #0f8f74;
  --warn: #b34f00;
  --border: rgba(9, 25, 30, 0.15);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.2);
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Space Grotesk", sans-serif;
  color: var(--ink);
  background: linear-gradient(135deg, var(--bg-1), var(--bg-2));
  min-height: 100vh;
}

.backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 85% 15%, rgba(29, 184, 166, 0.24) 0%, transparent 40%),
    radial-gradient(circle at 15% 85%, rgba(255, 106, 61, 0.22) 0%, transparent 35%);
}

.layout {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(5px);
  animation: rise 420ms ease both;
}

@keyframes rise {
  from {
    transform: translateY(12px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

h1,
h2 {
  margin: 0 0 0.4rem;
  line-height: 1.15;
}

h1 {
  font-size: clamp(1.5rem, 2.6vw, 2.35rem);
}

h2 {
  font-size: 1.2rem;
}

p {
  margin: 0.45rem 0;
}

.kicker {
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 700;
}

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

form {
  display: grid;
  gap: 0.8rem;
}

label {
  display: grid;
  gap: 0.32rem;
  font-weight: 500;
}

select,
input[type="number"] {
  width: 100%;
  border: 1px solid #cad7de;
  border-radius: 10px;
  min-height: 44px;
  padding: 0.5rem 0.65rem;
  font: inherit;
  background: #f8fbfc;
}

input[type="range"] {
  width: 100%;
}

.inline {
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.55rem;
  font-weight: 400;
}

.inline input {
  margin: 0;
}

.mono,
code,
.total,
.renewal .value {
  font-family: "IBM Plex Mono", monospace;
}

.result-card {
  display: grid;
  gap: 0.6rem;
}

.total {
  font-size: clamp(1.4rem, 3.8vw, 2.35rem);
  font-weight: 700;
  color: var(--ok);
}

.subtitle {
  color: var(--muted);
}

.breakdown {
  margin: 0.2rem 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.3rem;
}

.renewal {
  border-top: 1px solid var(--border);
  padding-top: 0.65rem;
}

.renewal .label {
  color: var(--muted);
}

.renewal .value {
  font-size: 1.2rem;
  font-weight: 600;
}

.warning {
  min-height: 1.2rem;
  color: var(--warn);
  font-size: 0.93rem;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 0.56rem;
  border-bottom: 1px solid #dde6ea;
  vertical-align: top;
}

thead th {
  background: #e9f3f1;
  color: #12353a;
}

a {
  color: #00478f;
}

.assumptions ul,
.footer ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.25rem;
}

@media (max-width: 920px) {
  .grid {
    grid-template-columns: 1fr;
  }
}