:root {
  --ink: #1B2A4A;
  --bg: #FBF6EA;
  --teal: #2F8FA6;
  --amber: #E8A33D;
  --amber-strong: #F0A63A;
  --green: #4C9A6A;
  --red: #C4574A;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'IBM Plex Sans', sans-serif;
}

h1, h2, h3, .price-big, .rate-big, .result-big, .brand-name {
  font-family: 'Fraunces', serif;
  margin: 0;
}

.mono { font-family: 'IBM Plex Mono', monospace; }
.muted { color: rgba(27,42,74,.45); }
.muted-text { color: rgba(27,42,74,.65); font-size: 14px; line-height: 1.6; max-width: 640px; }
.small { font-size: 11px; }
.accent { color: var(--amber); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.hidden { display: none !important; }

/* NAV */
.nav {
  position: sticky; top: 0; z-index: 30;
  background: rgba(251,246,234,.95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(27,42,74,.1);
}
.nav-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 20px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-badge {
  width: 32px; height: 32px; border-radius: 8px; background: var(--ink);
  display: flex; align-items: center; justify-content: center; font-size: 15px;
}
.brand-badge.small { width: 24px; height: 24px; font-size: 12px; border-radius: 6px; }
.brand-name { font-size: 18px; }
.brand-name.small { font-size: 14px; }
.nav-links { display: flex; gap: 26px; font-size: 13px; font-weight: 500; color: rgba(27,42,74,.65); }
.nav-links a { color: inherit; text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
@media (max-width: 860px) { .nav-links { display: none; } }

.auth-slot { display: flex; gap: 8px; align-items: center; }

/* BUTTONS */
.btn { border: none; cursor: pointer; font-family: inherit; font-weight: 600; font-size: 13px; border-radius: 10px; padding: 10px 16px; transition: .15s; }
.btn-ghost { background: transparent; color: rgba(27,42,74,.7); }
.btn-ghost:hover { background: rgba(27,42,74,.06); color: var(--ink); }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #243a63; }
.btn-cta { background: var(--amber); color: var(--ink); font-size: 14px; padding: 14px 22px; border-radius: 12px; box-shadow: 0 4px 14px rgba(232,163,61,.35); margin-top: 40px; }
.btn-cta:hover { background: #f0b155; }
.btn.full { width: 100%; padding: 13px; }

/* HERO */
.hero {
  border-bottom: 1px solid rgba(27,42,74,.1);
  background:
    radial-gradient(ellipse 900px 500px at 12% 0%, #FCE9C9 0%, transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 10%, #D7EEF1 0%, transparent 55%),
    var(--bg);
  padding: 56px 0 80px;
}
.eyebrow { font-size: 11px; text-transform: uppercase; letter-spacing: .18em; color: var(--amber); font-weight: 600; margin-bottom: 24px; }
h1 { font-size: 2.1rem; line-height: 1.05; max-width: 640px; margin-bottom: 40px; }
@media (min-width: 640px) { h1 { font-size: 3.1rem; } }
.br-desktop { display: none; }
@media (min-width: 640px) { .br-desktop { display: block; } }

.price-row { display: flex; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.price-big { font-size: 3.2rem; line-height: 1; }
@media (min-width: 640px) { .price-big { font-size: 5rem; } }
.price-unit { font-family: 'IBM Plex Mono'; color: rgba(27,42,74,.55); font-size: 14px; margin-bottom: 10px; }
.price-delta { font-family: 'IBM Plex Mono'; font-size: 14px; font-weight: 500; margin-bottom: 10px; padding: 4px 10px; border-radius: 999px; }
.price-delta.up { color: var(--green); background: rgba(76,154,106,.1); }
.gradient-line { height: 4px; border-radius: 999px; margin-top: 12px; background: linear-gradient(90deg, var(--teal), var(--amber), var(--red)); }
.price-caption { font-family: 'IBM Plex Mono'; font-size: 11px; color: rgba(27,42,74,.45); display: block; margin-top: 8px; }

/* SECTIONS */
.section { padding: 56px 0; }
.section-band { border-top: 1px solid rgba(27,42,74,.1); border-bottom: 1px solid rgba(27,42,74,.1); background: #fff; padding: 56px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 32px; }
.section-head-inline { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
h2 { font-size: 1.5rem; }

/* METRICS */
.metric-grid { display: grid; grid-template-columns: repeat(1, 1fr); gap: 16px; }
@media (min-width: 640px) { .metric-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .metric-grid { grid-template-columns: repeat(4, 1fr); } }
.metric-card { background: #fff; border: 1px solid rgba(27,42,74,.1); border-radius: 16px; padding: 20px; box-shadow: 0 1px 2px rgba(27,42,74,.06); }
.metric-chip { width: 36px; height: 36px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 16px; margin-bottom: 14px; }
.metric-label { font-size: 11px; text-transform: uppercase; letter-spacing: .12em; color: rgba(27,42,74,.55); font-weight: 500; margin-bottom: 8px; }
.metric-value-row { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.metric-value { font-family: 'Fraunces'; font-size: 1.7rem; }
.metric-delta { font-family: 'IBM Plex Mono'; font-size: 12px; font-weight: 500; }
.metric-delta.down { color: var(--red); }
.metric-delta.up { color: var(--green); }

/* KEY RATE */
.rate-grid { display: grid; grid-template-columns: 1fr; gap: 40px; }
@media (min-width: 1024px) { .rate-grid { grid-template-columns: 280px 1fr; } }
.label-accent { font-size: 11px; text-transform: uppercase; letter-spacing: .16em; color: var(--teal); font-weight: 600; }
.label-accent-light { font-size: 11px; text-transform: uppercase; letter-spacing: .14em; color: var(--amber-strong); }
.rate-big-row { display: flex; align-items: baseline; gap: 12px; margin: 20px 0 4px; }
.rate-big { font-size: 2.5rem; }
.rate-delta { font-family: 'IBM Plex Mono'; font-size: 12px; color: var(--green); background: rgba(76,154,106,.1); padding: 3px 10px; border-radius: 999px; font-weight: 500; }
.divider { border-top: 1px solid rgba(27,42,74,.1); margin: 20px 0 16px; }
.note { display: flex; gap: 8px; font-size: 11px; color: rgba(27,42,74,.45); margin-top: 20px; line-height: 1.5; }
.chart-holder { height: 320px; }

/* CALCULATOR */
.calc-grid { display: grid; grid-template-columns: 1fr; gap: 24px; margin-top: 28px; }
@media (min-width: 1024px) { .calc-grid { grid-template-columns: 1fr 320px; } }
.calc-panel { background: #fff; border: 1px solid rgba(27,42,74,.1); border-radius: 16px; padding: 28px; display: flex; flex-direction: column; gap: 22px; }
.calc-row-head { display: flex; justify-content: space-between; font-size: 14px; margin-bottom: 8px; }
.calc-row-head span:first-child { color: rgba(27,42,74,.7); font-weight: 500; }
.calc-row-head span:last-child { font-weight: 600; }
input[type="range"] { width: 100%; accent-color: var(--teal); }
.calc-result { background: var(--ink); color: #fff; border-radius: 16px; padding: 28px; display: flex; flex-direction: column; justify-content: space-between; }
.result-big { font-family: 'Fraunces'; font-size: 2.3rem; margin: 8px 0 20px; }
.result-line { display: flex; justify-content: space-between; font-size: 13px; color: rgba(255,255,255,.7); padding: 8px 0; border-top: 1px solid rgba(255,255,255,.12); }
.result-line .mono { color: #fff; }
.result-note { font-size: 11px; color: rgba(255,255,255,.4); margin-top: 20px; line-height: 1.5; }

/* CITIES */
.tabs { display: flex; gap: 8px; margin: 20px 0; }
.tab { border: 1px solid rgba(27,42,74,.15); background: transparent; color: rgba(27,42,74,.65); padding: 7px 18px; border-radius: 999px; font-size: 13px; font-weight: 500; cursor: pointer; }
.tab.active { background: var(--teal); border-color: var(--teal); color: #fff; }
.table-wrap { border: 1px solid rgba(27,42,74,.1); border-radius: 16px; overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead tr { background: rgba(27,42,74,.03); border-bottom: 1px solid rgba(27,42,74,.1); }
th { text-align: left; font-family: 'IBM Plex Mono'; font-size: 11px; text-transform: uppercase; letter-spacing: .1em; color: rgba(27,42,74,.55); font-weight: 500; padding: 12px 16px; }
th.right, td.right { text-align: right; }
td { padding: 14px 16px; border-bottom: 1px solid rgba(27,42,74,.08); }
tr:last-child td { border-bottom: none; }
tr.top-city { background: rgba(232,163,61,.08); }
.rank-delta.up { color: var(--green); }
.rank-delta.down { color: var(--red); }

/* JOURNAL */
.journal-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 640px) { .journal-grid { grid-template-columns: 1fr 1fr; } }
.journal-card { background: #fff; border: 1px solid rgba(27,42,74,.1); border-radius: 16px; padding: 22px; text-decoration: none; color: inherit; display: block; transition: .15s; }
.journal-card:hover { box-shadow: 0 6px 16px rgba(27,42,74,.08); transform: translateY(-2px); }
.journal-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.journal-tag { font-family: 'IBM Plex Mono'; font-size: 10px; text-transform: uppercase; letter-spacing: .14em; padding: 4px 10px; border-radius: 999px; font-weight: 600; }
.journal-date { font-family: 'IBM Plex Mono'; font-size: 11px; color: rgba(27,42,74,.4); }
.journal-title { font-size: 1.1rem; line-height: 1.35; margin-bottom: 8px; }
.journal-excerpt { font-size: 13px; color: rgba(27,42,74,.6); line-height: 1.55; }
.link-accent { font-size: 13px; font-weight: 500; color: var(--amber); text-decoration: none; }

/* ABOUT */
.about { background: var(--ink); color: #fff; border-top: 1px solid rgba(27,42,74,.1); padding: 56px 0; }
.about-grid { display: grid; grid-template-columns: 1fr; gap: 40px; }
@media (min-width: 1024px) { .about-grid { grid-template-columns: 1fr 1fr; } }
.about h2 { margin: 8px 0 20px; }
.about p { font-size: 14px; color: rgba(255,255,255,.7); line-height: 1.6; margin-bottom: 16px; }
.about-list { display: flex; flex-direction: column; gap: 12px; }
.about-item { background: rgba(255,255,255,.05); border-radius: 12px; padding: 16px; font-size: 14px; color: rgba(255,255,255,.8); line-height: 1.5; }

/* FOOTER */
.footer { padding: 40px 20px; display: flex; flex-direction: column; gap: 16px; align-items: flex-start; }
@media (min-width: 640px) { .footer { flex-direction: row; align-items: center; justify-content: space-between; } }
.footer p { max-width: 440px; margin: 0; }

/* MODAL */
.modal-overlay { position: fixed; inset: 0; background: rgba(27,42,74,.5); backdrop-filter: blur(3px); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 16px; }
.modal { background: var(--bg); border-radius: 18px; width: 100%; max-width: 380px; padding: 28px; position: relative; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.modal-close { position: absolute; top: 14px; right: 14px; border: none; background: transparent; font-size: 16px; cursor: pointer; padding: 6px; border-radius: 8px; }
.modal-close:hover { background: rgba(27,42,74,.06); }
.modal-icon { width: 40px; height: 40px; border-radius: 10px; background: rgba(47,143,166,.15); color: var(--teal); display: flex; align-items: center; justify-content: center; font-size: 18px; margin-bottom: 16px; }
.modal h3 { font-size: 1.3rem; margin-bottom: 4px; }
.modal-sub { font-size: 13px; color: rgba(27,42,74,.55); margin: 0 0 20px; }
#auth-form { display: flex; flex-direction: column; gap: 12px; }
#auth-form input { padding: 11px 14px; border-radius: 12px; border: 1px solid rgba(27,42,74,.15); background: #fff; font-size: 14px; font-family: inherit; }
#auth-form input:focus { outline: none; border-color: var(--teal); }
.auth-error { font-size: 13px; color: var(--red); background: rgba(196,87,74,.08); border-radius: 8px; padding: 8px 12px; }
.link-switch { width: 100%; text-align: center; background: none; border: none; color: var(--teal); font-size: 13px; font-weight: 500; margin-top: 16px; cursor: pointer; font-family: inherit; }
.link-switch:hover { text-decoration: underline; }