/* TCO Calculator - tco.sellf.app
   Sellf brand: dark-first, #0078BB akcent, Inter font
   Mobile-first, zero deps, vanilla CSS */

:root {
  --sf-bg-deep: #06080D;
  --sf-bg-base: #0B1120;
  --sf-bg-raised: #111B2E;
  --sf-bg-float: #162236;
  --sf-bg-input: #0B1120;
  --sf-accent: #0078BB;
  --sf-accent-hover: #2090D0;
  --sf-accent-soft: rgba(0, 120, 187, 0.10);
  --sf-accent-med: rgba(0, 120, 187, 0.22);
  --sf-text-heading: #F0F4FA;
  --sf-text-body: #94A3B8;
  --sf-text-muted: #7A8DA3;
  --sf-text-inverse: #0b1120;
  --sf-border: rgba(255, 255, 255, 0.08);
  --sf-border-strong: rgba(255, 255, 255, 0.16);
  --sf-success: #10B981;
  --sf-success-soft: rgba(16, 185, 129, 0.10);
  --sf-warning: #F59E0B;
  --sf-danger: #EF4444;
  --sf-shadow: 0 4px 24px -4px rgba(0, 0, 0, 0.5);
  --sf-shadow-accent: 0 4px 30px -4px rgba(0, 120, 187, 0.30);
  --sf-radius: 8px;
  --sf-radius-lg: 12px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--sf-bg-deep);
  color: var(--sf-text-body);
  line-height: 1.6;
  font-size: 16px;
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 15% 10%, rgba(0, 120, 187, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(0, 120, 187, 0.06) 0%, transparent 40%);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px;
}

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

.site-header {
  padding: 32px 0 16px;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--sf-text-muted);
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand-mark {
  display: inline-block;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--sf-accent);
  color: var(--sf-text-heading);
  font-size: 14px;
  line-height: 24px;
  text-align: center;
  font-weight: 700;
}

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

.hero {
  padding: 32px 0 40px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 800;
  color: var(--sf-text-heading);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.hero h1 .accent {
  color: var(--sf-accent);
}

.hero p.lead {
  font-size: clamp(16px, 2.5vw, 18px);
  color: var(--sf-text-body);
  max-width: 560px;
  margin: 0 auto;
}

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

.card {
  background: var(--sf-bg-raised);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius-lg);
  padding: 28px 24px;
  margin-bottom: 24px;
  box-shadow: var(--sf-shadow);
}

.card h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--sf-text-heading);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.card .card-sub {
  color: var(--sf-text-muted);
  font-size: 14px;
  margin-bottom: 24px;
}

/* ===== FORM INPUTS ===== */

.input-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

@media (min-width: 560px) {
  .input-row {
    grid-template-columns: 1fr 1fr;
  }
}

.input-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--sf-text-body);
  margin-bottom: 6px;
}

.input-group label .hint {
  font-weight: 400;
  color: var(--sf-text-muted);
  font-size: 12px;
}

.input-group input[type="number"],
.input-group select {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  background: var(--sf-bg-input);
  color: var(--sf-text-heading);
  border: 1px solid var(--sf-border-strong);
  border-radius: var(--sf-radius);
  transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}

.input-group input[type="number"]:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--sf-accent);
  box-shadow: 0 0 0 3px var(--sf-accent-soft);
}

.input-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2394A3B8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}

/* ===== ASSESSMENT ===== */

.assessment-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
}

.assessment-item {
  display: block;
  background: var(--sf-bg-float);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius);
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.assessment-item:hover {
  border-color: var(--sf-border-strong);
}

.assessment-item input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.assessment-item .check-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.assessment-item .checkbox {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 1.5px solid var(--sf-border-strong);
  border-radius: 4px;
  background: var(--sf-bg-input);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  margin-top: 2px;
}

.assessment-item input:checked ~ .check-row .checkbox {
  background: var(--sf-accent);
  border-color: var(--sf-accent);
}

.assessment-item input:checked ~ .check-row .checkbox::after {
  content: "";
  width: 5px;
  height: 9px;
  border-right: 2px solid white;
  border-bottom: 2px solid white;
  transform: rotate(45deg) translate(-1px, -1px);
}

.assessment-item input:checked ~ .check-row .q-text {
  color: var(--sf-text-heading);
}

.assessment-item input:checked + .check-row {
  background: transparent;
}

.assessment-item:has(input:checked) {
  border-color: var(--sf-accent-med);
  background: var(--sf-accent-soft);
}

.q-text {
  flex: 1;
  font-size: 14px;
  color: var(--sf-text-body);
  line-height: 1.5;
}

/* ===== BUTTON ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--sf-radius);
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
  width: 100%;
}

.btn-primary {
  background: var(--sf-accent);
  color: white;
  box-shadow: var(--sf-shadow-accent);
}

.btn-primary:hover:not(:disabled) {
  background: var(--sf-accent-hover);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: transparent;
  color: var(--sf-text-body);
  border: 1px solid var(--sf-border-strong);
}

.btn-secondary:hover {
  border-color: var(--sf-accent);
  color: var(--sf-accent);
}

/* ===== RESULTS ===== */

.results-section {
  display: none;
  animation: fadeIn 0.4s ease-out;
}

.results-section.visible {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.headline-loss {
  text-align: center;
  padding: 32px 20px;
  background: linear-gradient(135deg, var(--sf-bg-raised), var(--sf-bg-float));
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius-lg);
  margin-bottom: 24px;
}

.headline-loss .label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sf-text-muted);
  margin-bottom: 12px;
}

.headline-loss .amount {
  font-size: clamp(36px, 7vw, 56px);
  font-weight: 800;
  color: var(--sf-accent);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.headline-loss .amount-suffix {
  font-size: 14px;
  color: var(--sf-text-body);
}

/* Comparison table */

.comparison {
  margin-bottom: 24px;
}

.comparison-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 14px 16px;
  background: var(--sf-bg-float);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius);
  margin-bottom: 8px;
  transition: border-color 0.15s;
}

.comparison-row.is-sellf {
  background: var(--sf-accent-soft);
  border-color: var(--sf-accent-med);
}

.comparison-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--sf-text-heading);
}

.comparison-row.is-sellf .comparison-name::after {
  content: " ⭐";
}

.comparison-note {
  font-size: 12px;
  color: var(--sf-text-muted);
  margin-top: 2px;
}

.comparison-cost {
  font-size: 16px;
  font-weight: 700;
  color: var(--sf-text-heading);
  text-align: right;
}

.comparison-row.is-sellf .comparison-cost {
  color: var(--sf-accent);
}

.comparison-cost .cost-label {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--sf-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

/* Tier badge / message */

.tier-result {
  background: var(--sf-bg-raised);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius-lg);
  padding: 28px 24px;
  margin-bottom: 24px;
}

.tier-result.tier-low {
  border-color: rgba(245, 158, 11, 0.30);
}
.tier-result.tier-mid {
  border-color: var(--sf-accent-med);
  background: linear-gradient(135deg, var(--sf-bg-raised), var(--sf-accent-soft));
}
.tier-result.tier-high {
  border-color: rgba(16, 185, 129, 0.30);
  background: linear-gradient(135deg, var(--sf-bg-raised), var(--sf-success-soft));
}

.tier-badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 4px;
  margin-bottom: 12px;
}

.tier-low .tier-badge { background: rgba(245, 158, 11, 0.18); color: var(--sf-warning); }
.tier-mid .tier-badge { background: var(--sf-accent-med); color: var(--sf-accent); }
.tier-high .tier-badge { background: rgba(16, 185, 129, 0.18); color: var(--sf-success); }

.tier-headline {
  font-size: 22px;
  font-weight: 700;
  color: var(--sf-text-heading);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.tier-message {
  color: var(--sf-text-body);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.tier-cta {
  background: var(--sf-accent);
  color: white;
  padding: 14px 24px;
  border-radius: var(--sf-radius);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  transition: all 0.2s;
}

.tier-cta:hover {
  background: var(--sf-accent-hover);
  transform: translateY(-1px);
}

/* ===== EMAIL GATE ===== */

.email-gate {
  background: var(--sf-bg-raised);
  border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius-lg);
  padding: 28px 24px;
}

.email-gate h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--sf-text-heading);
  margin-bottom: 6px;
}

.email-gate p.gate-sub {
  color: var(--sf-text-muted);
  font-size: 14px;
  margin-bottom: 20px;
}

.email-input {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  background: var(--sf-bg-input);
  color: var(--sf-text-heading);
  border: 1px solid var(--sf-border-strong);
  border-radius: var(--sf-radius);
  margin-bottom: 14px;
  font-family: inherit;
}

.email-input:focus {
  outline: none;
  border-color: var(--sf-accent);
  box-shadow: 0 0 0 3px var(--sf-accent-soft);
}

.hp-field {
  position: absolute !important;
  left: -10000px !important;
  top: -10000px !important;
}

.altcha-badge {
  font-size: 11px;
  color: var(--sf-text-muted);
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.altcha-badge a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

altcha-widget {
  display: block;
  margin: 14px 0;
  --altcha-color-base: var(--sf-bg-float);
  --altcha-color-border: var(--sf-border-strong);
  --altcha-color-text: var(--sf-text-body);
  --altcha-color-border-focus: var(--sf-accent);
  --altcha-color-error-text: var(--sf-danger);
  --altcha-color-footer-bg: var(--sf-bg-raised);
}

.form-message {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: var(--sf-radius);
  font-size: 14px;
  display: none;
}

.form-message.success {
  display: block;
  background: var(--sf-success-soft);
  color: var(--sf-success);
  border: 1px solid rgba(16, 185, 129, 0.30);
}

.form-message.error {
  display: block;
  background: rgba(239, 68, 68, 0.10);
  color: var(--sf-danger);
  border: 1px solid rgba(239, 68, 68, 0.30);
}

.disclaimer {
  font-size: 12px;
  color: var(--sf-text-muted);
  text-align: center;
  margin-top: 12px;
}

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

.site-footer {
  padding: 40px 0 32px;
  text-align: center;
  font-size: 13px;
  color: var(--sf-text-muted);
}

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

.site-footer a:hover {
  text-decoration: underline;
}

.site-footer .meta {
  margin-top: 10px;
  font-size: 11px;
  color: var(--sf-text-muted);
  opacity: 0.7;
}

/* Print: hide form, show only results */
@media print {
  .site-header, .input-section, .assessment-section, .email-gate, .site-footer { display: none; }
  .container { max-width: 100%; }
  body { background: white; color: black; }
}