/* ==========================================
   Lib(3)ro — Landing Page — Design System
   ========================================== */

/* MARK: Variables */
:root {
  --bg:              #FBFBFA;
  --surface:         #FFFFFF;
  --text:            #1A1A1A;
  --text-secondary:  #5C5C5C;
  --border:          rgba(0,0,0,0.10);
  --border-strong:   rgba(0,0,0,0.20);
  --accent:          #1A1A1A;
  --accent-contrast: #FFFFFF;
  --focus:           #0A84FF;

  --radius-sm:   8px;
  --radius-md:   10px;
  --radius-lg:   12px;
  --radius-pill: 999px;

  --space-1:  4px;  --space-2:  8px;  --space-3: 12px;
  --space-4: 16px;  --space-5: 20px;  --space-6: 24px;
  --space-8: 32px;  --space-10:40px;  --space-12:48px;
  --space-16:64px;  --space-20:80px;  --space-24:96px;

  --maxw:        1080px;
  --maxw-narrow:  680px;

  --font-sans:  -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui,
                "Helvetica Neue", Arial, sans-serif;
  --font-serif: ui-serif, "New York", Georgia, "Times New Roman", serif;

  --ease: cubic-bezier(.2,.7,.2,1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:              #0D0D0D;
    --surface:         #1A1A1A;
    --text:            #F2F2F2;
    --text-secondary:  #A0A0A0;
    --border:          rgba(255,255,255,0.12);
    --border-strong:   rgba(255,255,255,0.22);
    --accent:          #F2F2F2;
    --accent-contrast: #0D0D0D;
  }
}

/* MARK: Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
button { font: inherit; cursor: pointer; border: none; background: none; padding: 0; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; }
p { margin: 0; }
figure { margin: 0; }
summary { cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }

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

/* MARK: Utilities */
.skip {
  position: absolute;
  left: -9999px; top: auto;
  width: 1px; height: 1px;
  overflow: hidden;
}
.skip:focus {
  position: fixed;
  left: var(--space-4); top: var(--space-4);
  width: auto; height: auto;
  padding: var(--space-3) var(--space-6);
  background: var(--accent);
  color: var(--accent-contrast);
  border-radius: var(--radius-md);
  z-index: 999;
  text-decoration: none;
  font-weight: 600;
}

.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;
}

.container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--narrow {
  max-width: var(--maxw-narrow);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section     { padding-block: var(--space-24); }
.section--sm { padding-block: var(--space-16); }

.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }

/* MARK: Typography */
h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.15;
}
h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.01em;
}
h3 {
  font-size: clamp(1rem, 2vw, 1.15rem);
  font-weight: 600;
}

/* MARK: Focus */
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 3px;
}

/* MARK: Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease),
              background 180ms var(--ease);
}
.btn--primary {
  background: var(--accent);
  color: var(--accent-contrast);
}
.btn--primary:hover { opacity: 0.82; transform: translateY(-1px); }
.btn--outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn--outline:hover { background: var(--surface); }

/* MARK: Pills */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 3px var(--space-3);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.pill--accent {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: transparent;
}

/* MARK: Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 380ms var(--ease), transform 380ms var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ==========================================
   MARK: Header / Nav
   ========================================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms, background 200ms;
}
.site-header.scrolled {
  border-bottom-color: var(--border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 60px;
}
.wordmark {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 300;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--text);
  flex-shrink: 0;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav-links a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 180ms;
}
.nav-links a:hover { color: var(--text); }
.nav-cta { font-size: 0.875rem; padding: var(--space-2) var(--space-5); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px; height: 32px;
  align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  transition: background 180ms;
}
.hamburger:hover { background: var(--border); }
.hamburger span {
  display: block;
  width: 18px; height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 200ms, opacity 200ms;
}
.mobile-menu {
  display: none;
  position: absolute; top: 60px; left: 0; right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: var(--space-4) var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
}
.mobile-menu a:last-child { border-bottom: none; }

@media (max-width: 720px) {
  .nav-links, .main-nav > .btn { display: none; }
  .hamburger { display: flex; }
}

/* ==========================================
   MARK: Hero
   ========================================== */
.hero {
  padding-block: var(--space-20) var(--space-16);
  text-align: center;
}
.hero-eyebrow { margin-bottom: var(--space-6); }
.hero h1 {
  max-width: 20ch;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}
.hero-sub {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 54ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}
.hero-form-wrap {
  max-width: 500px;
  margin-inline: auto;
  margin-bottom: var(--space-4);
}
.hero-microcopy {
  font-size: 0.875rem;
  color: var(--text-secondary);
  max-width: 46ch;
  margin-inline: auto;
  margin-bottom: var(--space-16);
  line-height: 1.65;
}
.hero-screenshot { max-width: 900px; margin-inline: auto; }

/* ==========================================
   MARK: Waitlist Form
   ========================================== */
.waitlist { display: flex; flex-direction: column; gap: var(--space-3); }
.waitlist-row { display: flex; gap: var(--space-2); }
.waitlist input[type="email"] {
  flex: 1; min-width: 0;
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.9375rem;
  outline: none;
  transition: border-color 180ms, box-shadow 180ms;
}
.waitlist input[type="email"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 18%, transparent);
}
.waitlist input[type="email"]::placeholder { color: var(--text-secondary); }
.waitlist .hp { display: none !important; }
.waitlist .consent {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-align: left;
  cursor: pointer;
}
.waitlist .consent input[type="checkbox"] {
  flex-shrink: 0;
  width: 15px; height: 15px;
  margin-top: 3px;
  accent-color: var(--accent);
  cursor: pointer;
}
.waitlist .consent a { color: var(--text); text-underline-offset: 2px; }
.form-msg {
  font-size: 0.875rem;
  min-height: 1.4em;
  color: var(--text-secondary);
}
.form-msg.success { color: #1d7d3d; }
.form-msg.error   { color: #b91c1c; }
@media (prefers-color-scheme: dark) {
  .form-msg.success { color: #4ade80; }
  .form-msg.error   { color: #f87171; }
}
@media (max-width: 520px) {
  .waitlist-row { flex-direction: column; }
  .waitlist .btn { width: 100%; justify-content: center; }
}

/* ==========================================
   MARK: Placeholder screenshot
   ========================================== */
.placeholder-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--surface);
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: var(--space-8);
  text-align: center;
}
.placeholder-img .ph-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  opacity: 0.5;
}
.placeholder-img--43 { aspect-ratio: 4 / 3; }

/* ==========================================
   MARK: Showcase
   ========================================== */
.showcase { background: var(--surface); }
.showcase-intro { margin-bottom: var(--space-16); }
.showcase-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  padding-block: var(--space-12);
  border-top: 1px solid var(--border);
}
.showcase-item:first-of-type { border-top: none; }
.showcase-item:nth-child(even) .showcase-text { order: 1; }
.showcase-item:nth-child(even) .showcase-img  { order: 0; }
.showcase-caption {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}
.showcase-text h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); margin-bottom: var(--space-3); }
.showcase-text p  { color: var(--text-secondary); line-height: 1.7; }
figcaption { font-size: 0.8125rem; color: var(--text-secondary); margin-top: var(--space-3); text-align: center; }
@media (max-width: 720px) {
  .showcase-item { grid-template-columns: 1fr; gap: var(--space-8); }
  .showcase-item:nth-child(even) .showcase-text { order: 0; }
  .showcase-item:nth-child(even) .showcase-img  { order: 1; }
}

/* ==========================================
   MARK: Value / Pillars
   ========================================== */
.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-12);
}
.value-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color 200ms, transform 200ms;
}
.value-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.value-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--text) 8%, transparent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-4);
}
.value-icon svg {
  width: 20px; height: 20px;
  stroke: var(--text); fill: none;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}
.value-card h3 { margin-bottom: var(--space-2); }
.value-card p  { font-size: 0.9375rem; color: var(--text-secondary); line-height: 1.65; }

/* ==========================================
   MARK: Functions / Modules
   ========================================== */
.functions-intro {
  text-align: center;
  max-width: var(--maxw-narrow);
  margin-inline: auto;
  margin-bottom: var(--space-12);
}
.functions-intro p { margin-top: var(--space-4); color: var(--text-secondary); }

.module-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-4);
}
.module-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border);
}
.module-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--text) 8%, transparent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.module-icon svg {
  width: 17px; height: 17px;
  stroke: var(--text); fill: none;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}
.module-header-text { flex: 1; }
.module-header-text strong { font-size: 0.9375rem; display: block; }
.module-header-text span   { font-size: 0.8125rem; color: var(--text-secondary); }

.module-list { padding: var(--space-2) var(--space-6) var(--space-4); }
.module-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
}
.module-item:last-child { border-bottom: none; }
.module-item-icon {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--text-secondary);
}
.module-item-icon svg {
  width: 15px; height: 15px;
  stroke: currentColor; fill: none;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}
.module-item-text strong { font-size: 0.9rem; display: block; margin-bottom: 2px; }
.module-item-text span   { font-size: 0.8125rem; color: var(--text-secondary); }

.modules-optional { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.module-optional-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  padding: var(--space-4) var(--space-6);
}
@media (max-width: 600px) { .modules-optional { grid-template-columns: 1fr; } }

/* ==========================================
   MARK: Trust / Local-first
   ========================================== */
.trust {
  background: var(--accent);
  color: var(--accent-contrast);
}
.trust h2 { color: var(--accent-contrast); }
.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-12);
}
.trust-item { display: flex; flex-direction: column; gap: var(--space-3); }
.trust-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent-contrast) 12%, transparent);
  display: flex; align-items: center; justify-content: center;
}
.trust-icon svg {
  width: 20px; height: 20px;
  stroke: var(--accent-contrast); fill: none;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}
.trust-item strong { font-size: 1rem; font-weight: 600; }
.trust-item p { font-size: 0.9375rem; opacity: 0.72; line-height: 1.6; }

/* ==========================================
   MARK: Pricing
   ========================================== */
.pricing-intro {
  text-align: center;
  max-width: var(--maxw-narrow);
  margin-inline: auto;
  margin-bottom: var(--space-12);
}
.pricing-intro p { margin-top: var(--space-4); color: var(--text-secondary); line-height: 1.7; }
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  max-width: 740px;
  margin-inline: auto;
}
.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.pricing-card--featured { border-color: var(--border-strong); border-width: 1.5px; }
.pricing-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}
.pricing-price strong { font-size: 1.65rem; font-weight: 700; display: block; margin-bottom: 2px; }
.pricing-price small  { font-size: 0.8125rem; color: var(--text-secondary); }
.pricing-card p { font-size: 0.9375rem; color: var(--text-secondary); line-height: 1.65; flex: 1; }
.pricing-card .btn { margin-top: auto; justify-content: center; }
@media (max-width: 600px) { .pricing-grid { grid-template-columns: 1fr; } }

/* ==========================================
   MARK: FAQ
   ========================================== */
.faq-list { margin-top: var(--space-12); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:first-child { border-top: 1px solid var(--border); }
details.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  font-size: 1rem;
  font-weight: 600;
}
.faq-chevron {
  flex-shrink: 0;
  color: var(--text-secondary);
  transition: transform 200ms var(--ease);
}
.faq-chevron svg {
  display: block;
  width: 18px; height: 18px;
  stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
details[open] .faq-chevron { transform: rotate(180deg); }
.faq-answer {
  padding-bottom: var(--space-5);
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: var(--maxw-narrow);
}

/* ==========================================
   MARK: CTA Final
   ========================================== */
.cta-final { text-align: center; }
.cta-final h2 {
  font-family: var(--font-serif);
  font-weight: 300;
  margin-bottom: var(--space-4);
}
.cta-final > .container > .container--narrow > p {
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

/* ==========================================
   MARK: Footer
   ========================================== */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-12);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-6);
}
.footer-brand p { font-size: 0.875rem; color: var(--text-secondary); margin-top: var(--space-2); }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  align-items: center;
}
.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 180ms;
}
.footer-links a:hover { color: var(--text); }
.footer-bottom {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  padding-top: var(--space-6);
}
@media (max-width: 600px) { .footer-top { flex-direction: column; } }

/* ==========================================
   MARK: Legal pages
   ========================================== */
.legal-content {
  max-width: var(--maxw-narrow);
  margin-inline: auto;
  padding-block: var(--space-16);
}
.legal-content h1 { margin-bottom: var(--space-8); }
.legal-content h2 {
  font-size: 1.125rem;
  margin-top: var(--space-10);
  margin-bottom: var(--space-3);
}
.legal-content p, .legal-content li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-3);
}
.legal-content ul { list-style: disc; padding-left: var(--space-6); }
.legal-content a  { color: var(--text); }
.legal-content .update-date { font-size: 0.8125rem; }
.legal-content .back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  font-size: 0.875rem;
  text-decoration: none;
  color: var(--text-secondary);
}
.legal-content .back-link:hover { color: var(--text); }

/* ==========================================
   MARK: Utility pages (grazie / 404)
   ========================================== */
.page-center {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.page-center-inner { max-width: 480px; padding-inline: var(--space-6); }
.page-center h1 { margin-bottom: var(--space-4); }
.page-center p  { color: var(--text-secondary); margin-bottom: var(--space-6); }