/* ==========================================================================
   Asha launch site — plain CSS, no build step, no external fonts.
   Logo reference lives in ONE place: the --logo-url custom property below.
   Swap that single line to change the mark everywhere (header, hero, footer).
   ========================================================================== */

:root {
  --logo-url: url("assets/asha-logo.png");

  --bg: #0b0f17;
  --bg-alt: #0f1521;
  --surface: #151d2c;
  --surface-2: #1b2536;
  --border: #263247;
  --text: #eaf0f8;
  --text-muted: #9fb0c7;
  --accent: #5b9bff;
  --accent-strong: #7db1ff;
  --accent-contrast: #06111f;
  --warm: #ff9a4d;
  --ring: #7db1ff;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 12px 34px rgba(2, 8, 20, 0.45);
  --wrap: 1120px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono",
    monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f9fc;
    --bg-alt: #eef2f8;
    --surface: #ffffff;
    --surface-2: #f3f6fb;
    --border: #dbe3ee;
    --text: #101a2b;
    --text-muted: #55657d;
    --accent: #1f63d6;
    --accent-strong: #1a55b8;
    --accent-contrast: #ffffff;
    --warm: #d9731f;
    --ring: #1f63d6;
    --shadow: 0 10px 26px rgba(24, 39, 68, 0.12);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
  font-weight: 700;
}

h1 { font-size: clamp(2.1rem, 5.2vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.35rem); }
h3 { font-size: 1.18rem; }

p { margin: 0 0 1rem; }

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

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.05em 0.35em;
}

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

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 0.6rem 1rem;
  z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}
.skip-link:focus {
  left: 0;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 22px;
}
.wrap-narrow { max-width: 780px; }

/* Logo mark (single reference via --logo-url) */
.brand-mark {
  display: inline-block;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  background-image: var(--logo-url);
  background-size: cover;
  background-position: center;
  border-radius: 9px;
}
.brand-mark-sm { width: 26px; height: 26px; border-radius: 7px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.12rem;
  margin-right: auto;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}
.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}
.site-nav a:hover { color: var(--text); }
.site-nav a.btn { color: var(--accent-contrast); }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 9px;
  cursor: pointer;
  gap: 4px;
  flex-direction: column;
}
.nav-toggle-bar {
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.62rem 1.05rem;
  font-size: 0.98rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
}
.btn-primary:hover { background: var(--accent-strong); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--accent); }
.btn-small { padding: 0.42rem 0.8rem; font-size: 0.9rem; }
.btn-lg { padding: 0.78rem 1.35rem; font-size: 1.03rem; }
.btn-block { width: 100%; }

/* Hero */
.hero {
  position: relative;
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(1100px 460px at 78% -8%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 62%),
    radial-gradient(760px 380px at 12% 8%, color-mix(in srgb, var(--warm) 12%, transparent), transparent 60%);
}
.hero-inner { max-width: 860px; }
.hero-mark {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  margin-bottom: 1.4rem;
  box-shadow: var(--shadow);
}
.hero-sub {
  font-size: clamp(1.02rem, 2.2vw, 1.22rem);
  color: var(--text-muted);
  max-width: 60ch;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.6rem 0 0.9rem;
}
.hero-note {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* Sections */
.section { padding: clamp(3rem, 7vw, 5.2rem) 0; }
.section-alt { background: var(--bg-alt); }
.section-lead {
  color: var(--text-muted);
  max-width: 62ch;
  font-size: 1.05rem;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--accent-strong);
  margin: 0 0 0.6rem;
}
.proof {
  margin-top: 1.6rem;
  padding: 0.95rem 1.15rem;
  border-left: 3px solid var(--warm);
  background: var(--surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
}

/* Steps */
.steps {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}
.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.35rem;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent-strong);
  font-weight: 700;
  margin-bottom: 0.8rem;
}
.step h3 { margin-bottom: 0.35rem; }
.step p { margin: 0; color: var(--text-muted); }

/* Features */
.features {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.1rem;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.4rem;
}
.feature h3 {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.4rem;
}
.feature-num {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--warm);
  font-weight: 700;
}
.feature p { margin: 0; color: var(--text-muted); }

/* Section note */
.section-note {
  margin-top: 1.8rem;
  color: var(--text-muted);
  font-size: 0.94rem;
  max-width: 70ch;
}

/* Download */
.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-top: 2rem;
}
.download-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  display: flex;
  flex-direction: column;
}
.download-card-pending { opacity: 0.92; }
.download-head {
  display: flex;
  gap: 0.9rem;
  align-items: center;
  margin-bottom: 0.9rem;
}
.download-head h3 { margin: 0; }
.os-mark {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border-radius: 10px;
  background: linear-gradient(145deg, var(--accent), color-mix(in srgb, var(--warm) 70%, var(--accent)));
}
.os-mark-win { background: linear-gradient(145deg, #5f6b7d, #38414f); }
.download-meta { margin: 0; color: var(--text-muted); font-size: 0.9rem; }
.download-card p { color: var(--text-muted); }
.install-note {
  margin-top: 1rem;
  padding: 0.8rem 0.9rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}
.pending-tag {
  margin: auto 0 0;
  display: inline-block;
  align-self: flex-start;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.first-run {
  margin-top: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
}
.first-run h3 { margin-bottom: 0.6rem; }
.first-run ol { margin: 0; padding-left: 1.2rem; color: var(--text-muted); }
.first-run li { margin-bottom: 0.35rem; }

/* FAQ */
.faq {
  margin-top: 1.8rem;
  border-top: 1px solid var(--border);
}
.faq details {
  border-bottom: 1px solid var(--border);
}
.faq summary {
  cursor: pointer;
  padding: 1.1rem 2.2rem 1.1rem 0;
  font-weight: 600;
  position: relative;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0.2rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--accent-strong);
  transition: transform 0.15s ease;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p {
  margin: 0 0 1.15rem;
  color: var(--text-muted);
  max-width: 68ch;
}

/* Footer */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 1.6rem;
}
.footer-brand { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-brand p { margin: 0; color: var(--text-muted); max-width: 34ch; }
.footer-col h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
}
.footer-col a {
  display: block;
  color: var(--text);
  text-decoration: none;
  font-size: 0.94rem;
  margin-bottom: 0.45rem;
}
.footer-col a:hover { color: var(--accent-strong); }
.footer-legal {
  margin-top: 2rem;
  border-top: 1px solid var(--border);
  padding-top: 1.2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.footer-legal p { margin: 0.2rem 0; }

/* Policy pages */
.policy {
  padding: clamp(2.5rem, 6vw, 4rem) 0 4rem;
}
.policy h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); }
.policy h2 {
  font-size: 1.35rem;
  margin-top: 2rem;
}
.policy p, .policy li { color: var(--text-muted); }
.policy .updated { font-size: 0.9rem; }
.policy .back { display: inline-block; margin-top: 2rem; }

/* Responsive */
@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0.8rem 22px 1.1rem;
    display: none;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 0.55rem 0.2rem; }
  .site-nav a.btn { margin-top: 0.5rem; }
  .header-inner { position: relative; }
}

@media (max-width: 520px) {
  .footer-inner { grid-template-columns: 1fr; }
  .cta-row .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
  .btn:hover { transform: none; }
}