/* =============================================
   RESET & BASE
   ============================================= */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

:root {
  --color-bg: #f8f8f6;
  --color-surface: #ffffff;
  --color-border: #e4e4e0;
  --color-text: #1a1a18;
  --color-text-muted: #6b6b65;
  --color-text-light: #9b9b94;

  --color-primary: #1a5cff;
  --color-primary-dark: #1248d6;
  --color-primary-light: #e8effe;

  --color-safe: #16a34a;
  --color-safe-bg: #f0fdf4;
  --color-safe-border: #bbf7d0;
  --color-safe-badge: #dcfce7;

  --color-close: #d97706;
  --color-close-bg: #fffbeb;
  --color-close-border: #fde68a;
  --color-close-badge: #fef3c7;

  --color-risky: #dc2626;
  --color-risky-bg: #fef2f2;
  --color-risky-border: #fecaca;
  --color-risky-badge: #fee2e2;

  --color-positive: #16a34a;
  --color-negative: #dc2626;

  --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 10px;
  --radius-sm: 6px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-width: 320px;
}

/* =============================================
   LAYOUT
   ============================================= */

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px;
}

/* =============================================
   HEADER
   ============================================= */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

/* =============================================
   HERO
   ============================================= */

.hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 32px 0 28px;
  text-align: center;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.hero h1 {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-text);
  max-width: 520px;
}

.hero-sub {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 480px;
}

/* =============================================
   BUTTONS
   ============================================= */

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
  border: none;
  outline: none;
  line-height: 1;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 2px 8px rgba(26, 92, 255, 0.28);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-muted);
  border: 1.5px solid var(--color-border);
  padding: 12px 24px;
}

.btn-secondary:hover {
  background: var(--color-bg);
  border-color: #c4c4be;
}

.btn-full {
  width: 100%;
  text-align: center;
  padding: 16px;
  font-size: 17px;
}

/* =============================================
   CARD
   ============================================= */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 40px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

/* =============================================
   CALCULATOR SECTION
   ============================================= */

.calculator-section {
  padding: 20px 0 48px;
}

.trust-line {
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-light);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  opacity: 0.8;
}

.card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 24px;
}

.field-group-full {
  grid-column: 1 / -1;
}

.field-group-inline {
  grid-column: 1 / -1;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 0;
  padding: 10px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: none;
  margin-top: 6px;
}

.revenue-toggle-group {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
  margin-bottom: 10px;
}

.revenue-toggle-row {
  margin-top: 0;
}

.revenue-toggle-hint {
  margin-top: 0;
  margin-bottom: 2px;
}

.field-group-inline > label {
  flex-shrink: 0;
  margin-bottom: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.field-group-inline .radio-group {
  flex-shrink: 0;
}

.field-group-inline .radio-label {
  padding: 7px 16px;
  border: 1.5px solid var(--color-border);
  background: var(--color-bg);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
}

.field-group-inline .radio-label:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

.input-prefix-wrap--half {
  max-width: 50%;
}

/* =============================================
   FORM FIELDS
   ============================================= */

.field-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 14px;
  position: relative;
}

.field-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 0;
  flex-wrap: wrap;
}

.label-sub-row {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 1px;
}

.label-sub-row .label-note {
  margin-top: 0;
}

.label-note {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-muted);
}

.input-prefix-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.prefix {
  position: absolute;
  left: 14px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-muted);
  pointer-events: none;
  line-height: 1;
}

input[type="number"] {
  width: 100%;
  padding: 13px 14px 13px 30px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  appearance: textfield;
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.1);
}

select {
  width: 100%;
  padding: 13px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  cursor: pointer;
  appearance: auto;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

select:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.1);
}

input[type="number"].has-error {
  border-color: var(--color-risky);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

/* Radio buttons */

.radio-group {
  display: flex;
  gap: 8px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-direction: row;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  padding: 10px 18px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  transition: border-color 0.15s ease, background 0.15s ease;
  user-select: none;
}

.radio-label:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.radio-label input[type="radio"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.conditional-field {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 2px 0 2px;
  margin-bottom: 0;
}

.form-error {
  font-size: 14px;
  color: var(--color-risky);
  font-weight: 500;
  padding: 10px 16px;
  background: var(--color-risky-bg);
  border: 1px solid var(--color-risky-border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

/* =============================================
   RESULT SECTION
   ============================================= */

.result-section {
  padding: 0 0 64px 0;
}

.result-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
  width: fit-content;
}

.result-badge.safe {
  background: var(--color-safe-badge);
  color: var(--color-safe);
}

.result-badge.close {
  background: var(--color-close-badge);
  color: var(--color-close);
}

.result-badge.risky {
  background: var(--color-risky-badge);
  color: var(--color-risky);
}

.result-card.safe {
  border-color: var(--color-safe-border);
  border-top: 3px solid var(--color-safe);
}

.result-card.close {
  border-color: var(--color-close-border);
  border-top: 3px solid var(--color-close);
}

.result-card.risky {
  border-color: var(--color-risky-border);
  border-top: 3px solid var(--color-risky);
}

.result-headline {
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.result-headline.safe { color: var(--color-safe); }
.result-headline.close { color: var(--color-close); }
.result-headline.risky { color: var(--color-risky); }

.result-cashflow {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: -16px;
}

.result-subtext {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* =============================================
   BREAKDOWN TABLE
   ============================================= */

.breakdown {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 0;
  font-size: 14px;
}

.breakdown-row + .breakdown-row {
  border-top: 1px solid var(--color-border);
}

.breakdown-label {
  color: var(--color-text-muted);
  font-weight: 400;
}

.breakdown-value {
  font-weight: 600;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.breakdown-value.positive {
  color: var(--color-positive);
}

.breakdown-value.negative {
  color: var(--color-negative);
}

.breakdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: 4px 0;
}

.breakdown-total .breakdown-label {
  font-weight: 600;
  color: var(--color-text);
}

.breakdown-total .breakdown-value {
  font-size: 16px;
}

/* =============================================
   INSIGHTS
   ============================================= */

.insights {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.insight-item {
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary);
  padding: 10px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.5;
}

/* =============================================
   HINT HELPERS
   ============================================= */

.hint-trigger {
  display: inline;
  background: none;
  border: none;
  padding: 0;
  margin-left: 6px;
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font);
  color: var(--color-text-light);
  cursor: pointer;
  text-decoration: none;
  border-bottom: 1px dashed var(--color-border);
  vertical-align: middle;
  line-height: 1;
  transition: color 0.12s ease, border-color 0.12s ease;
}

.hint-trigger:hover,
.hint-trigger--active {
  color: var(--color-text-muted);
  border-bottom-color: var(--color-text-muted);
}

.hint-panel {
  font-size: 12px;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  line-height: 1.55;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}

.hint-panel strong {
  display: block;
  font-size: 10px;
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.hint-panel em {
  font-style: normal;
  color: var(--color-text-light);
}

.hint-panel--standalone {
  margin-top: 6px;
  margin-bottom: 10px;
  grid-column: 1 / -1;
  box-shadow: none;
}

.hint-note {
  display: block;
  margin-top: 6px;
}

@media (min-width: 601px) {
  .hint-panel:not(.hint-panel--standalone) {
    position: absolute;
    left: calc(100% + 10px);
    top: 2px;
    width: 200px;
    z-index: 10;
    margin: 0;
  }

  .hint-panel:not(.hint-panel--standalone)::before {
    content: '';
    position: absolute;
    left: -5px;
    top: 12px;
    width: 8px;
    height: 8px;
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    transform: rotate(45deg);
  }
}

/* =============================================
   SHARE ACTIONS
   ============================================= */

.share-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 16px;
}

.btn-share {
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  padding: 10px 18px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
  line-height: 1;
}

.btn-share:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.share-feedback {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-safe);
}

/* =============================================
   SUPPORT LINKS SECTION
   ============================================= */

.support-links-section {
  padding: 20px 0 40px;
}

.support-links-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 10px;
}

.support-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 0;
}

.support-link {
  font-size: 13px;
  color: var(--color-text-muted);
  text-decoration: none;
  padding-right: 18px;
  border-right: 1px solid var(--color-border);
  margin-right: 18px;
  line-height: 1.4;
  transition: color 0.12s ease;
}

.support-link:last-child {
  border-right: none;
  padding-right: 0;
  margin-right: 0;
}

.support-link:hover {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.support-link--tool {
  font-weight: 600;
  color: var(--color-primary);
}

.support-link--tool:hover {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (max-width: 600px) {
  .support-links-row {
    flex-direction: column;
    gap: 10px;
  }

  .support-link {
    border-right: none;
    padding-right: 0;
    margin-right: 0;
    padding-left: 10px;
    border-left: 2px solid var(--color-border);
  }
}

/* =============================================
   SEO SECTION
   ============================================= */

.seo-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 64px 0;
}

.seo-block {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.seo-block h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.seo-block p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* =============================================
   FOOTER
   ============================================= */

.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  text-align: center;
  margin-top: 40px;
}

.site-footer p {
  font-size: 13px;
  color: var(--color-text-light);
}

.site-footer a {
  color: var(--color-text-light);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
  color: var(--color-text-muted);
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 600px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .input-prefix-wrap--half {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .card {
    padding: 20px;
  }

  .result-card {
    padding: 20px;
  }

  .hero {
    padding: 24px 0 20px;
  }

  .calculator-section {
    padding: 16px 0 40px;
  }

  .radio-group {
    flex-wrap: wrap;
  }

  .radio-label {
    flex: 1;
    justify-content: center;
    min-width: 80px;
  }
}

/* =============================================
   SUPPORT PAGES
   ============================================= */

.logo {
  text-decoration: none;
}

.support-hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0 32px;
}

.support-breadcrumb {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.support-breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.support-breadcrumb a:hover {
  text-decoration: underline;
}

.support-hero h1 {
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 10px;
}

.support-body {
  padding: 40px 0 64px;
}

.support-container {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.support-section {
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
}

.support-section:last-of-type {
  border-bottom: none;
}

.support-section h2 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: 12px;
}

.support-section p {
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.65;
  margin-bottom: 12px;
}

.support-section p:last-child {
  margin-bottom: 0;
}

.formula-block {
  background: var(--color-primary-light);
  border: 1px solid #c5d8fe;
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  line-height: 1.5;
}

.example-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-top: 4px;
}

.example-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.example-item:last-child {
  border-bottom: none;
}

.example-item--total {
  background: var(--color-bg);
}

.example-label {
  color: var(--color-text-muted);
  flex: 1;
}

.example-calc {
  color: var(--color-text);
  text-align: right;
  white-space: nowrap;
}

.cost-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 12px;
}

.cost-item {
  font-size: 14px;
  color: var(--color-text-muted);
  padding: 9px 0 9px 18px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  line-height: 1.5;
}

.cost-item::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 17px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.5;
}

.cost-item:last-child {
  border-bottom: none;
}

.support-top-cta {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 14px;
  margin-bottom: 0;
}

.support-inline-cta {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.support-inline-cta:hover {
  text-decoration: underline;
}

.support-text-link {
  color: var(--color-primary);
  text-decoration: none;
}

.support-text-link:hover {
  text-decoration: underline;
}

.ad-block {
  max-width: 800px;
  margin: 32px auto;
  padding: 16px;
  background: #f9f9f9;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-sizing: border-box;
  width: 100%;
}

.ad-label {
  font-size: 12px;
  color: var(--color-text-muted);
  opacity: 0.6;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 8px;
}

.ad-container {
  min-height: 90px;
}

.ad-placeholder {
  display: none !important;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  padding: 28px 16px;
  margin: 8px 0;
  min-height: 90px;
}

.ad-placeholder span {
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.6;
}

.support-cta {
  padding: 36px 0 8px;
  text-align: center;
}

.support-cta p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.support-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 20px 0 0;
  border-top: 1px solid var(--color-border);
  margin-top: 16px;
}

.support-nav-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  width: 100%;
}

.support-nav a {
  font-size: 13px;
  color: var(--color-primary);
  text-decoration: none;
}

.support-nav a:hover {
  text-decoration: underline;
}

.support-nav--tools a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
}

.support-nav--tools a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .support-hero {
    padding: 28px 0 24px;
  }

  .support-body {
    padding: 24px 0 48px;
  }

  .example-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .example-calc {
    text-align: left;
  }
}