/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg-start: #2e1065;
  --bg-mid: #170a35;
  --bg-end: #0a0a0a;
  --violet-600: #7c3aed;
  --violet-500: #8b5cf6;
  --violet-400: #a78bfa;
  --violet-300: #c084fc;
  --ink: #f6f4fb;
  --muted: #b7abd9;
  --muted-2: #8b7fae;
  --card-bg: rgba(255, 255, 255, 0.055);
  --card-bg-strong: rgba(255, 255, 255, 0.09);
  --card-border: rgba(255, 255, 255, 0.14);
  --card-border-strong: rgba(196, 160, 255, 0.35);
  --danger: #f87171;
  --success: #4ade80;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-violet: 0 25px 70px -25px rgba(124, 58, 237, 0.65);
  --shadow-soft: 0 10px 30px -12px rgba(0, 0, 0, 0.5);
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --display: "Space Grotesk", var(--sans);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --container-w: 1120px;
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: radial-gradient(120% 90% at 85% -10%, rgba(124, 58, 237, 0.35), transparent 55%),
              radial-gradient(100% 70% at 10% 0%, rgba(139, 92, 246, 0.22), transparent 50%),
              linear-gradient(180deg, var(--bg-start) 0%, var(--bg-mid) 38%, var(--bg-end) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
  min-height: 100svh;
}

img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.08; letter-spacing: -0.02em; font-family: var(--display); font-weight: 600; }
::selection { background: var(--violet-500); color: #fff; }

:focus-visible {
  outline: 2px solid var(--violet-300);
  outline-offset: 3px;
  border-radius: 6px;
}

[hidden] { display: none !important; }

input, select {
  font: inherit;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.85rem;
  width: 100%;
  transition: border-color 0.2s var(--ease-out), background 0.2s var(--ease-out);
}
input::placeholder { color: var(--muted-2); }
input:focus, select:focus {
  border-color: var(--violet-400);
  background: rgba(255, 255, 255, 0.08);
}
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 18px) center, calc(100% - 13px) center; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat; padding-right: 2rem; }

/* =============================================================
   3. Utilities
   ============================================================= */
.container { max-width: var(--container-w); margin-inline: auto; padding-inline: 1.25rem; }

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: 0.6rem 1rem; background: var(--ink); color: #0a0a0a;
  z-index: 9999; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

/* =============================================================
   4. Components
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.85rem 1.4rem; border-radius: 999px; font-weight: 600; font-size: 0.95rem;
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out), background 0.2s var(--ease-out);
}
.btn-primary {
  background: linear-gradient(135deg, var(--violet-600), var(--violet-400));
  color: #fff;
  box-shadow: var(--shadow-violet);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 30px 80px -22px rgba(124, 58, 237, 0.8); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  color: var(--ink);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.11); }
.btn-block { width: 100%; }
.btn-small { padding: 0.5rem 0.9rem; font-size: 0.82rem; white-space: nowrap; }
.btn-danger { color: var(--danger); border-color: rgba(248, 113, 113, 0.35); }
.btn-danger:hover { background: rgba(248, 113, 113, 0.1); }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}
@supports not (backdrop-filter: blur(1px)) {
  .card { background: rgba(20, 12, 40, 0.85); }
}

.field { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1.1rem; }
.field label { font-size: 0.85rem; font-weight: 600; color: var(--muted); }
.field-hint { font-size: 0.78rem; color: var(--muted-2); margin-top: 0.2rem; }
.input-with-button { display: flex; gap: 0.5rem; align-items: stretch; }
.input-with-button input { flex: 1 1 auto; min-width: 0; }
.input-with-button select { flex: 0 0 auto; width: auto; }

.form-error { color: var(--danger); font-size: 0.85rem; margin-top: 0.75rem; }

/* =============================================================
   5. Header / Hero
   ============================================================= */
.site-header { padding-block: 1.4rem; }
.site-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.logo { display: flex; align-items: center; }
.logo-img { height: 42px; width: auto; display: block; }
.header-tag { color: var(--muted); font-size: 0.9rem; }

.hero { padding-block: 1.5rem 2.2rem; text-align: center; }
.hero h1 {
  font-size: clamp(2.1rem, 5.5vw, 3.4rem);
  max-width: 20ch;
  margin-inline: auto;
  background: linear-gradient(135deg, #fff 20%, var(--violet-300) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-subtitle { color: var(--muted); font-size: 1.05rem; max-width: 52ch; margin: 0.9rem auto 0; }

/* =============================================================
   6. App shell
   ============================================================= */
.tool-card { padding-block: 0.5rem 2rem; }
.noscript-msg { padding: 1rem; border-radius: var(--radius-md); background: rgba(248, 113, 113, 0.12); border: 1px solid rgba(248, 113, 113, 0.3); }

.panel { max-width: 100%; }

/* --- gate --- */
.gate-panel { max-width: 460px; margin-inline: auto; }
.gate-panel form.card,
.gate-panel form { padding: 2rem; border-radius: var(--radius-lg); background: var(--card-bg); border: 1px solid var(--card-border); backdrop-filter: blur(18px) saturate(140%); -webkit-backdrop-filter: blur(18px) saturate(140%); box-shadow: var(--shadow-soft); }
.gate-panel h2 { font-size: 1.5rem; margin-bottom: 0.4rem; }
.panel-hint { color: var(--muted); font-size: 0.88rem; margin-bottom: 1.4rem; }
#btnCancelAccountEdit { margin-top: 0.6rem; }

/* --- welcome / dashboard --- */
.welcome-row { margin-bottom: 1.2rem; }
.welcome-msg { color: var(--muted); }
.welcome-msg strong { color: var(--ink); }

.dashboard {
  padding: 1.6rem;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: var(--shadow-soft);
  margin-bottom: 1.5rem;
}

.dashboard-top { display: flex; flex-direction: column; gap: 1.6rem; align-items: center; text-align: center; }
.dashboard-headline h2 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.empty-state-msg { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.8rem; }

.margin-control { margin-top: 1rem; text-align: left; max-width: 320px; margin-inline: auto; }
.margin-control label { font-size: 0.85rem; color: var(--muted); display: block; margin-bottom: 0.5rem; }
.margin-control strong { color: var(--violet-300); }
.margin-control input[type="range"] {
  width: 100%; appearance: none; height: 6px; border-radius: 999px;
  background: linear-gradient(90deg, var(--violet-600), var(--violet-300));
}
.margin-control input[type="range"]::-webkit-slider-thumb {
  appearance: none; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; border: 3px solid var(--violet-500); cursor: pointer;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}
.margin-control input[type="range"]::-moz-range-thumb {
  width: 20px; height: 20px; border-radius: 50%;
  background: #fff; border: 3px solid var(--violet-500); cursor: pointer;
}

.gauge-wrap { position: relative; display: flex; flex-direction: column; align-items: center; }
#gauge { width: min(300px, 80vw); height: auto; overflow: visible; }
.gauge-arc-bg { fill: none; stroke: rgba(255, 255, 255, 0.12); stroke-width: 14; stroke-linecap: round; }
.gauge-arc-value { fill: none; stroke: url(#gaugeGradient); stroke-width: 14; stroke-linecap: round; filter: drop-shadow(0 0 10px rgba(139, 92, 246, 0.65)); }
.gauge-needle { stroke: #fff; stroke-width: 4; stroke-linecap: round; filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.6)); }
.gauge-pivot { fill: #fff; stroke: var(--violet-500); stroke-width: 3; }
.gauge-tick-label { fill: var(--muted); font-size: 11px; font-family: var(--sans); }

.gauge-readout { margin-top: -2.4rem; text-align: center; }
.gauge-value { font-family: var(--display); font-weight: 700; font-size: clamp(2.2rem, 6vw, 2.8rem); display: block; color: #fff; }
.gauge-unit { font-size: 0.85rem; color: var(--muted); }

.breakdown-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.8rem;
  margin-top: 1.8rem;
}
.breakdown-card { padding: 1.1rem 1.2rem; text-align: left; }
.breakdown-card h3 { font-size: 0.78rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; }
.card-value { font-family: var(--display); font-size: 1.5rem; font-weight: 700; margin-top: 0.35rem; }
.card-hint { font-size: 0.75rem; color: var(--muted-2); margin-top: 0.15rem; }
.breakdown-card--total { border-color: var(--card-border-strong); }
.breakdown-card--total .card-value { color: var(--violet-300); }
.breakdown-card--recommended {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.35), rgba(192, 132, 252, 0.15));
  border-color: var(--card-border-strong);
  grid-column: span 2;
}
.breakdown-card--recommended .card-value { font-size: 2rem; color: #fff; }

/* --- data sections (accordion) --- */
#formData { display: flex; flex-direction: column; gap: 1rem; }
.data-section {
  padding: 1.3rem 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}
.data-section summary {
  cursor: pointer; font-family: var(--display); font-weight: 600; font-size: 1.1rem;
  list-style: none; display: flex; align-items: center; justify-content: space-between;
}
.data-section summary::-webkit-details-marker { display: none; }
.data-section summary::after { content: "＋"; color: var(--muted); font-size: 1.2rem; transition: transform 0.25s var(--ease-out); }
.data-section[open] summary::after { content: "－"; }
.data-section .edit-grid { margin-top: 1.2rem; }

.edit-grid { display: grid; grid-template-columns: 1fr; gap: 0 1.2rem; }
.other-expenses { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--card-border); }
.other-expenses h4 { font-size: 0.95rem; margin-bottom: 0.2rem; }
.other-row { display: flex; gap: 0.5rem; margin-bottom: 0.6rem; align-items: center; }
.other-row .other-label { flex: 1 1 auto; }
.other-row .other-amount { flex: 0 0 110px; }
.btn-remove-other {
  flex: 0 0 auto; width: 36px; height: 36px; border-radius: 50%;
  background: rgba(248, 113, 113, 0.1); color: var(--danger); font-size: 0.9rem;
}
.btn-remove-other:hover { background: rgba(248, 113, 113, 0.2); }

.dashboard-actions { display: flex; gap: 0.8rem; justify-content: center; margin-top: 1.5rem; flex-wrap: wrap; }

/* =============================================================
   7. Privacy badge / ad slots
   ============================================================= */
.privacy-badge {
  text-align: center; color: var(--muted); font-size: 0.85rem;
  padding-block: 1rem;
}
.ad-slot {
  min-height: 90px; border: 1px dashed var(--card-border);
  border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center;
  color: var(--muted-2); font-size: 0.8rem; letter-spacing: 0.05em; text-transform: uppercase;
  margin-block: 1.5rem;
}

.promo-band { margin-block: 1.5rem; }
.promo-card {
  display: flex; flex-direction: column; gap: 1.2rem; align-items: flex-start;
  padding: 1.6rem 1.8rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.28), rgba(192, 132, 252, 0.1));
  border: 1px solid var(--card-border-strong);
  box-shadow: var(--shadow-violet);
}
.promo-eyebrow { color: var(--violet-300); font-weight: 700; font-size: 0.85rem; margin-bottom: 0.4rem; }
.promo-card h2 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.promo-card p:not(.promo-eyebrow) { color: var(--muted); max-width: 60ch; }
.promo-cta { white-space: nowrap; }

@media (min-width: 720px) {
  .promo-card { flex-direction: row; align-items: center; justify-content: space-between; }
}

/* =============================================================
   8. How it works / SEO / FAQ
   ============================================================= */
.how-it-works, .seo-text, .faq { padding-block: 2.2rem; }
.how-it-works h2, .seo-text h2, .faq h2 { text-align: center; font-size: 1.8rem; margin-bottom: 1.6rem; }

.steps-grid { display: grid; grid-template-columns: 1fr; gap: 1.2rem; }
.step-item {
  padding: 1.4rem; border-radius: var(--radius-md); background: var(--card-bg);
  border: 1px solid var(--card-border); text-align: center;
}
.step-icon { width: 36px; height: 36px; margin-inline: auto 0.8rem; color: var(--violet-300); }
.step-item h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.step-item p { color: var(--muted); font-size: 0.9rem; }

.seo-text { max-width: 72ch; margin-inline: auto; }
.seo-text p { color: var(--muted); margin-bottom: 1rem; }
.seo-text h2 { text-align: left; }

.faq details {
  padding: 1rem 1.2rem; border-radius: var(--radius-md); background: var(--card-bg);
  border: 1px solid var(--card-border); margin-bottom: 0.7rem;
}
.faq summary { cursor: pointer; font-weight: 600; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "❯ "; color: var(--violet-300); }
.faq p { color: var(--muted); margin-top: 0.6rem; font-size: 0.92rem; }

/* =============================================================
   9. Footer
   ============================================================= */
.site-footer { padding-block: 2rem; border-top: 1px solid var(--card-border); margin-top: 2rem; }
.footer-inner { display: flex; flex-direction: column; gap: 0.8rem; align-items: center; text-align: center; color: var(--muted); font-size: 0.85rem; }
.footer-links { display: flex; gap: 1.2rem; }
.footer-links a:hover { color: var(--violet-300); }

/* =============================================================
   10. Responsive
   ============================================================= */
@media (min-width: 540px) {
  .edit-grid { grid-template-columns: repeat(2, 1fr); }
  .edit-grid .field { grid-column: span 1; }
}

@media (min-width: 720px) {
  .dashboard-top { flex-direction: row; justify-content: space-between; text-align: left; align-items: center; }
  .dashboard-headline { flex: 1 1 auto; max-width: 460px; }
  .margin-control { margin-inline: 0; }
  .breakdown-grid { grid-template-columns: repeat(3, 1fr); }
  .breakdown-card--recommended { grid-column: span 1; }
  .steps-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 960px) {
  .breakdown-grid { grid-template-columns: repeat(5, 1fr); }
}

@media (min-width: 1280px) {
  .gate-panel form { padding: 2.6rem; }
}

/* =============================================================
   11. Reduced motion — only intrusive effects
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .btn-primary:hover { transform: none; }
}