/* HardCap landing — dark developer-tool aesthetic */
:root {
  --bg: #0b0f14;
  --bg-alt: #111821;
  --surface: #151d28;
  --surface-2: #1a2433;
  --border: #243044;
  --border-strong: #334155;
  --text: #e8eef7;
  --text-muted: #9aa8bc;
  --text-dim: #6b7a90;
  --primary: #38bdf8;
  --primary-dim: #0ea5e9;
  --primary-fg: #041018;
  --accent: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --font: "Inter", "SF Pro Text", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --max: 1120px;
  --narrow: 640px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a {
  color: var(--primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover { color: #7dd3fc; }

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: var(--primary-fg);
  padding: 0.5rem 1rem;
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.container.narrow {
  width: min(100% - 2rem, var(--narrow));
}

.section {
  padding: 5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
  border-block: 1px solid var(--border);
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
}

.section h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section-lead {
  margin: 0 0 2rem;
  max-width: 42rem;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.cta-inline {
  margin: 2.5rem 0 0;
}

.mono { font-family: var(--mono); font-size: 0.9em; }

.zh-helper {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(11, 15, 20, 0.85);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, #0ea5e9, #22d3ee);
  color: #041018;
  font-size: 0.7rem;
  font-weight: 800;
}

.nav {
  display: none;
  align-items: center;
  gap: 1.25rem;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav a:hover { color: var(--text); }

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.55rem 0.6rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.75rem 1rem 1.25rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.mobile-nav[hidden] { display: none !important; }

.mobile-nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.35rem 0;
}

@media (min-width: 860px) {
  .nav { display: flex; }
  .nav-toggle { display: none; }
  .mobile-nav { display: none !important; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

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

.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.875rem; }
.btn-lg { padding: 0.85rem 1.35rem; font-size: 1rem; }
.btn-block { width: 100%; }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dim));
  color: var(--primary-fg);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.25);
}

.btn-primary:hover {
  color: var(--primary-fg);
  filter: brightness(1.05);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

/* Hero */
.hero {
  padding-top: 4rem;
  padding-bottom: 4.5rem;
  background:
    radial-gradient(ellipse 80% 50% at 70% -10%, rgba(56, 189, 248, 0.18), transparent),
    radial-gradient(ellipse 50% 40% at 10% 30%, rgba(52, 211, 153, 0.08), transparent),
    var(--bg);
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 920px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
  }
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.subhead {
  margin: 0 0 1.75rem;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 36rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.hero-note {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.mock-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.mock-top {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.mock-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.mock-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  flex: 1;
}

.badge {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.45rem;
  border-radius: 999px;
}

.badge-live {
  background: rgba(52, 211, 153, 0.15);
  color: var(--accent);
}

.budget-row {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem;
  margin-bottom: 0.75rem;
}

.budget-row.blocked {
  border-color: rgba(248, 113, 113, 0.45);
  background: rgba(248, 113, 113, 0.08);
}

.budget-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.budget-bar {
  height: 8px;
  border-radius: 999px;
  background: #0f172a;
  overflow: hidden;
}

.budget-fill {
  height: 100%;
  background: linear-gradient(90deg, #22d3ee, #fbbf24);
  border-radius: inherit;
}

.status-blocked {
  color: var(--danger);
  font-weight: 700;
}

.mock-reason {
  margin: 0.4rem 0 0;
  font-size: 0.82rem;
  color: #fca5a5;
}

.mock-providers {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.mock-providers span {
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
}

/* Before / After */
.before-after {
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .before-after { grid-template-columns: 1fr 1fr; }
}

.ba-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.ba-card h3 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.ba-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
}

.ba-card li + li { margin-top: 0.55rem; }

.ba-card.before h3 { color: var(--warning); }
.ba-card.after {
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.08);
}
.ba-card.after h3 { color: var(--primary); }

/* WPSR */
.wpsr-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 800px) {
  .wpsr-grid { grid-template-columns: repeat(2, 1fr); }
}

.wpsr-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
}

.wpsr-card h3 {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--primary);
}

.wpsr-card p {
  margin: 0;
  color: var(--text-muted);
}

.wpsr-card.highlight {
  background: linear-gradient(160deg, rgba(56, 189, 248, 0.12), var(--surface));
  border-color: rgba(56, 189, 248, 0.4);
}

.wpsr-card.highlight p { color: var(--text); }

/* Features */
.features-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1000px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
  .features-grid .feature-card:nth-child(4),
  .features-grid .feature-card:nth-child(5) {
    grid-column: span 1;
  }
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.feature-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 1.35rem;
  margin-bottom: 0.6rem;
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 800px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
}

.step {
  display: flex;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
}

.step-num {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(56, 189, 248, 0.15);
  color: var(--primary);
  font-weight: 700;
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Use cases */
.usecases-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .usecases-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1000px) {
  .usecases-grid { grid-template-columns: repeat(3, 1fr); }
}

.usecase-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.usecase-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.usecase-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Signals */
.signals-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.signals-list a {
  display: block;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  transition: border-color 0.15s ease;
}

.signals-list a:hover {
  border-color: rgba(56, 189, 248, 0.45);
}

.signal-source {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.3rem;
}

.signal-title {
  display: block;
  color: var(--text);
  font-size: 0.98rem;
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 0.65rem;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.35rem 1rem;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.85rem 0;
  list-style: none;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--text-dim);
  font-weight: 400;
}

.faq-item[open] summary::after { content: "–"; }

.faq-item p {
  margin: 0 0 1rem;
  color: var(--text-muted);
}

/* Waitlist */
.waitlist-section {
  background:
    radial-gradient(ellipse 70% 60% at 50% 0%, rgba(56, 189, 248, 0.14), transparent),
    var(--bg);
}

.waitlist-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.form-row {
  margin-bottom: 1.1rem;
  border: 0;
  padding: 0;
  min-width: 0;
}

.form-row label,
.form-row legend {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
  font-size: 0.92rem;
}

.req { color: var(--danger); }
.optional {
  font-weight: 400;
  color: var(--text-dim);
  font-size: 0.85em;
}

input[type="email"],
select {
  width: 100%;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

input[type="email"]:focus,
select:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.check {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 400;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.7rem;
  cursor: pointer;
}

.check input { accent-color: var(--primary); }

.privacy {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.field-error,
.form-status {
  margin: 0.4rem 0 0;
  font-size: 0.88rem;
}

.field-error { color: var(--danger); }

.form-status.is-error {
  color: var(--danger);
  margin-bottom: 0.75rem;
}

.form-status.is-info {
  color: var(--warning);
  margin-bottom: 0.75rem;
}

.waitlist-success {
  text-align: center;
  background: var(--surface);
  border: 1px solid rgba(52, 211, 153, 0.4);
  border-radius: 16px;
  padding: 2rem 1.5rem;
}

.success-icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(52, 211, 153, 0.15);
  color: var(--accent);
  font-size: 1.4rem;
  font-weight: 700;
}

.waitlist-success h3 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
}

.waitlist-success p {
  margin: 0 0 0.5rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 1.5rem;
  background: #070a0e;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.footer-tag {
  margin: 0.5rem 0;
  color: var(--text-muted);
  max-width: 28rem;
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-start;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover { color: var(--primary); }

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

.footer-bottom p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Language switcher */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: 0.5rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.lang-switch a {
  color: var(--text-dim);
  text-decoration: none;
  padding: 0.15rem 0.4rem;
  border-radius: 999px;
}

.lang-switch a:hover {
  color: var(--text);
}

.lang-switch a[aria-current="page"] {
  color: var(--primary-fg);
  background: var(--primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-nav .lang-switch {
  margin: 0.5rem 0 0;
  align-self: flex-start;
}