/* ==========================================================================
   NoteHaul — shared stylesheet
   No external fonts, no external requests. System font stack only.
   Light and dark themes via prefers-color-scheme.
   ========================================================================== */

:root {
  color-scheme: light dark;

  --bg: #ffffff;
  --bg-subtle: #f4f6f9;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --text: #14171c;
  --text-muted: #545c67;
  --border: #dce1e8;
  --border-strong: #c2c9d3;

  --accent: #1b53bd;
  --accent-hover: #143f91;
  --accent-contrast: #ffffff;
  --accent-soft: #e8effc;

  --mark-bg: #ffe9a3;
  --mark-text: #5a4200;
  --mark-border: #d9a800;

  --draft-bg: #fff3d1;
  --draft-text: #6a4a00;
  --draft-border: #dfa300;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 6px 20px rgba(16, 24, 40, 0.06);

  --maxw: 74rem;
  --measure: 70ch;
  --pad: clamp(1rem, 4vw, 2rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --bg-subtle: #151a20;
    --surface: #171c23;
    --surface-alt: #1b2129;
    --text: #e9ecf1;
    --text-muted: #a7b0bc;
    --border: #2a323c;
    --border-strong: #3b4553;

    --accent: #7fb0ff;
    --accent-hover: #a3c6ff;
    --accent-contrast: #0b1220;
    --accent-soft: #1c2836;

    --mark-bg: #4a3a00;
    --mark-text: #ffe9a3;
    --mark-border: #a88400;

    --draft-bg: #3d2f05;
    --draft-text: #ffe6ac;
    --draft-border: #a87c00;

    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.35);
  }
}

/* --------------------------------------------------------------- Reset --- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", "Liberation Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(1rem, 0.97rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

h1,
h2,
h3,
h4 {
  line-height: 1.22;
  margin: 0 0 0.6em;
  letter-spacing: -0.011em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.85rem, 1.2rem + 2.6vw, 3rem);
}

h2 {
  font-size: clamp(1.35rem, 1.1rem + 1.1vw, 1.9rem);
  margin-top: 0;
}

h3 {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
}

p {
  margin: 0 0 1rem;
  text-wrap: pretty;
}

ul,
ol {
  margin: 0 0 1rem;
  padding-left: 1.35em;
}

li {
  margin-bottom: 0.45em;
}

li > ul,
li > ol {
  margin-top: 0.45em;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.07em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-hover);
}

strong {
  font-weight: 700;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ------------------------------------------------------------ Layout ---- */

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface);
  color: var(--text);
  padding: 0.6rem 1rem;
  border: 2px solid var(--accent);
  border-radius: var(--radius-sm);
  z-index: 100;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

/* ------------------------------------------------------------ Header ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  padding-block: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 24px;
  font-weight: 750;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}

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

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 7px;
  background: var(--accent);
  color: var(--accent-contrast);
  font-size: 0.9rem;
  font-weight: 800;
  line-height: 1;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}

.site-nav li {
  margin: 0;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.3rem 0.15rem;
  border-radius: 6px;
}

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

.site-nav a[aria-current="page"] {
  color: var(--text);
  font-weight: 650;
}

/* --------------------------------------------- Header: mobile disclosure ---
   Desktop keeps the inline nav. Under 720px the nav collapses into a no-JS
   <details> disclosure, the header stops being sticky and stays <= 64px tall.
   The opened menu is absolutely positioned so it never grows the header bar. */

.nav-disclosure {
  display: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.55rem 0.95rem;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 650;
  line-height: 1.25;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.nav-toggle::-webkit-details-marker {
  display: none;
}

.nav-toggle::after {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translate(-1px, -1px);
  transition: transform 0.15s ease;
}

.nav-disclosure[open] .nav-toggle::after {
  transform: rotate(-135deg) translate(-1px, -1px);
}

.nav-toggle:hover {
  color: var(--accent);
}

@media (max-width: 719.98px) {
  .site-header {
    position: relative;
    background: var(--bg);
    backdrop-filter: none;
  }

  .site-header .wrap {
    flex-wrap: nowrap;
    gap: 0.5rem;
    padding-block: 0.4rem;
  }

  .site-nav-desktop,
  .site-header .header-cta {
    display: none;
  }

  .nav-disclosure {
    display: block;
    margin-left: auto;
  }

  .site-nav-mobile {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 60;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 0.5rem var(--pad) 0.85rem;
  }

  .site-nav-mobile ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
    font-size: 1rem;
  }

  .site-nav-mobile a {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 0.5rem 0.6rem;
    border-radius: var(--radius-sm);
  }

  .site-nav-mobile a:hover {
    background: var(--surface-alt);
    text-decoration: none;
  }
}

/* ----------------------------------------------------------- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  font: inherit;
  font-weight: 650;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  padding: 0.72rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--accent-contrast);
}

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

.btn-secondary:hover {
  background: var(--surface-alt);
  color: var(--text);
}

.btn-sm {
  min-height: 34px;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

/* ---------------------------------------------------------- Sections ---- */

main {
  display: block;
}

.section {
  padding-block: clamp(2.25rem, 1.5rem + 3vw, 4rem);
}

.section + .section {
  border-top: 1px solid var(--border);
}

.section-subtle {
  background: var(--bg-subtle);
}

.lede {
  font-size: 1.125em;
  color: var(--text-muted);
  max-width: var(--measure);
}

.prose {
  max-width: var(--measure);
}

.prose > :first-child {
  margin-top: 0;
}

.prose h2 {
  margin-top: 2.25rem;
}

.prose h2:first-of-type {
  margin-top: 0;
}

.prose-spaced {
  margin-top: 2.25rem;
}

.steps {
  list-style: none;
  padding-left: 0;
}

.steps > li {
  margin-bottom: 0;
}

/* -------------------------------------------------------------- Hero ---- */

.hero {
  padding-block: clamp(2.5rem, 1.5rem + 5vw, 5rem);
  background:
    radial-gradient(1200px 420px at 50% -240px, var(--accent-soft), transparent 70%),
    var(--bg);
}

.hero h1 {
  max-width: 22ch;
  margin-bottom: 1rem;
}

.hero .lede {
  font-size: clamp(1.05rem, 1rem + 0.35vw, 1.2rem);
  max-width: 60ch;
  margin-bottom: 1.75rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1rem;
}

.small-print {
  margin-top: 1.1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 62ch;
}

/* -------------------------------------------------------------- Grid ---- */

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin-top: 1.5rem;
}

@media (min-width: 40rem) {
  .grid-2,
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 62rem) {
  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
}

.card h3 {
  margin-bottom: 0.4rem;
}

.card p:last-child,
.card ul:last-child {
  margin-bottom: 0;
}

.step-number {
  display: inline-grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.6rem;
}

@media (prefers-color-scheme: dark) {
  .step-number {
    color: var(--accent);
  }
}

/* ----------------------------------------------------------- Pricing ---- */

.price-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin-top: 1.5rem;
}

@media (min-width: 48rem) {
  .price-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

.price-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.45rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.price-card.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.price-tier {
  font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.4rem);
  font-weight: 750;
  letter-spacing: -0.015em;
  line-height: 1.3;
  margin: 0 0 0.5rem;
}

.price-note {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.1rem;
}

.price-card .btn {
  align-self: flex-start;
  margin-top: auto;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.18rem 0.6rem;
  margin-bottom: 0.7rem;
}

/* --------------------------------------------------------------- FAQ ---- */

.faq-list {
  margin-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item summary {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  min-height: 44px;
  cursor: pointer;
  padding: 1rem 0.15rem;
  font-weight: 650;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-weight: 700;
  color: var(--text-muted);
  flex: none;
  padding-left: 1rem;
}

.faq-item[open] summary::after {
  content: "\2212";
}

.faq-item summary:hover {
  color: var(--accent);
}

.faq-answer {
  padding: 0 0.15rem 1.1rem;
  color: var(--text-muted);
  max-width: var(--measure);
}

.faq-answer > :last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------- Callouts ----- */

.draft-notice {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  align-items: baseline;
  background: var(--draft-bg);
  color: var(--draft-text);
  border: 1px solid var(--draft-border);
  border-left-width: 5px;
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  margin: 0 0 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.draft-notice .label {
  letter-spacing: 0.04em;
}

.placeholder {
  background: var(--mark-bg);
  color: var(--mark-text);
  border: 1px dashed var(--mark-border);
  border-radius: 4px;
  padding: 0.05em 0.35em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
  font-weight: 700;
  white-space: nowrap;
}

.meta-list {
  display: grid;
  gap: 0.35rem 1rem;
  grid-template-columns: 1fr;
  margin: 0 0 1.5rem;
  padding: 1rem 1.15rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
}

@media (min-width: 40rem) {
  .meta-list {
    grid-template-columns: max-content 1fr;
  }
}

.meta-list dt {
  font-weight: 700;
  color: var(--text);
}

.meta-list dd {
  margin: 0;
  color: var(--text-muted);
  overflow-wrap: anywhere;
}

.page-head {
  padding-block: clamp(1.75rem, 1.25rem + 2.5vw, 3rem);
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
}

.page-head h1 {
  margin-bottom: 0.35rem;
}

.page-head .updated {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* ------------------------------------------------------------ Footer ---- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
  padding-block: clamp(1.75rem, 1.25rem + 2vw, 2.75rem);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.site-footer p {
  max-width: var(--measure);
}

.site-footer .brand {
  margin: 0 0 0.5rem;
  display: inline-flex;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
  list-style: none;
  margin: 1.25rem 0;
  padding: 0;
}

.footer-links li {
  margin: 0;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
}

.footer-disclaimer {
  border-top: 1px solid var(--border);
  padding-top: 1.1rem;
  margin-top: 1.1rem;
  font-size: 0.9rem;
}

.footer-legal {
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

.copyright {
  margin-top: 1rem;
  font-size: 0.9rem;
}

/* -------------------------------------------------------- Utilities ----- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.muted {
  color: var(--text-muted);
}

.email {
  overflow-wrap: anywhere;
}

@media print {
  .site-header,
  .hero-actions {
    display: none;
  }
}

/* Pre-launch: disabled CTAs + banner */
.btn.is-disabled,
.btn.is-disabled:hover {
  background: #d1d5db;
  border-color: #d1d5db;
  color: #4b5563;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}
.prelaunch-banner {
  margin: 0;
  padding: 6px 16px;
  text-align: center;
  font-size: 0.85rem;
  background: #fff7e6;
  color: #7a4b00;
  border-bottom: 1px solid #f3dfb4;
}