/* ─────────────────────────────────────────────────────────────────────────
   Sidekick landing page — Sentinel design system
   Hero blue #0846ED, power yellow #FDD400, Inter, surface tier system,
   tonal lift, gradient CTAs, soft definition borders.
   ───────────────────────────────────────────────────────────────────────── */

:root {
  /* Surface tier */
  --surface-base: #F5F6F7;
  --surface-low: #EFF1F2;
  --surface: #FFFFFF;
  --surface-container: #E6E8EA;
  --surface-high: #E0E3E4;
  --surface-highest: #DADDDF;

  /* Text */
  --on-surface: #2C2F30;
  --on-surface-variant: #595C5D;
  --outline: #757778;
  --outline-variant: #ABADAE;

  /* Brand */
  --primary: #0846ED;
  --primary-container: #859AFF;
  --on-primary: #F2F1FF;
  --secondary-container: #FDD400;
  --on-secondary-container: #594A00;
  --tertiary: #B7131A;

  /* Status */
  --green: #4DAB9A;
  --orange: #FFA344;

  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Radius + spacing */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;
  --r-full: 9999px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface-base: #0E1112;
    --surface-low: #16191A;
    --surface: #202425;
    --surface-container: #1A1D1E;
    --surface-high: #24272A;
    --surface-highest: #2E3133;
    --on-surface: #E0E3E4;
    --on-surface-variant: #ABADAE;
    --outline: #898B8C;
    --outline-variant: #595C5D;
    --primary: #6D88FF;
    --primary-container: #003CD3;
  }
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--on-surface);
  background: var(--surface-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Nav ──────────────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--surface-base) 90%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
}
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 16px;
}
.brand {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
}
.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px; /* ~iOS squircle at small size */
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  display: block;
  flex-shrink: 0;
}
.wordmark {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--on-surface-variant);
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--on-surface); }

/* ─── Buttons ──────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  border: none;
  border-radius: var(--r-md);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  color: #fff;
  box-shadow:
    0 8px 18px rgba(8, 70, 237, 0.28),
    0 2px 4px rgba(8, 70, 237, 0.12);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 12px 26px rgba(8, 70, 237, 0.34),
    0 2px 4px rgba(8, 70, 237, 0.16);
}
.btn-primary:active { transform: translateY(0); }
.btn-link {
  background: transparent;
  color: var(--on-surface);
  padding: 14px 16px;
  font-weight: 600;
}
.btn-link:hover { color: var(--primary); }
.btn-ghost-sm {
  padding: 8px 14px;
  font-size: 13px;
  background: var(--surface);
  color: var(--on-surface);
  border: 1px solid var(--surface-high);
  border-radius: var(--r-full);
}
.btn-ghost-sm:hover {
  background: var(--surface-low);
  color: var(--primary);
}
.arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}
.btn-primary:hover .arrow { transform: translateX(3px); }

/* ─── Hero ──────────────────────────────────────────────────────────── */
.hero {
  padding: 48px 0 96px;
  position: relative;
  overflow: hidden;
}
@media (max-width: 640px) {
  .hero { padding: 32px 0 72px; }
  .hero-icon { width: 80px; height: 80px; border-radius: 18px; }
}
.hero::before {
  content: '';
  position: absolute;
  inset: -10% -10% auto -10%;
  height: 600px;
  background:
    radial-gradient(
      ellipse at 50% 0%,
      rgba(253, 212, 0, 0.10),
      transparent 35%
    ),
    radial-gradient(
      ellipse at 50% 15%,
      rgba(8, 70, 237, 0.10),
      transparent 60%
    );
  z-index: -1;
}
.hero-inner {
  text-align: center;
  max-width: 760px;
}
.hero-icon-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}
.hero-icon {
  width: 96px;
  height: 96px;
  border-radius: 22px; /* ~iOS squircle at 96px (22.9%) */
  display: block;
  overflow: hidden; /* belt + suspenders for the radius clip */
  /* Soft, elegant drop shadow — depth without drama */
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.05),
    0 10px 24px rgba(8, 70, 237, 0.14),
    0 3px 8px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.hero-icon:hover {
  transform: translateY(-2px);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.05),
    0 14px 30px rgba(8, 70, 237, 0.18),
    0 4px 10px rgba(0, 0, 0, 0.1);
}
.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--r-full);
  background: rgba(8, 70, 237, 0.10);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2px;
  margin-bottom: 28px;
}
.hero h1 {
  font-size: clamp(40px, 7vw, 68px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -1.5px;
  margin: 0 0 24px;
  color: var(--on-surface);
}
.grad-text {
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--on-surface-variant);
  margin: 0 0 36px;
  font-weight: 500;
  line-height: 1.6;
}
.hero-cta {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-trust {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--on-surface-variant);
}
.hero-trust span:nth-child(even) { color: var(--outline-variant); }

/* ─── Sections ─────────────────────────────────────────────────────── */
section { padding: 80px 0; }
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.6px;
  text-align: center;
  margin: 0 0 12px;
  color: var(--on-surface);
}
.section-sub {
  text-align: center;
  font-size: 16px;
  color: var(--on-surface-variant);
  max-width: 580px;
  margin: 0 auto 56px;
  font-weight: 500;
}

/* ─── Features ─────────────────────────────────────────────────────── */
.features { background: var(--surface-low); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--surface-high);
  border-radius: var(--r-xl);
  padding: 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(44, 47, 48, 0.06);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.2px;
  margin: 0 0 8px;
  color: var(--on-surface);
}
.feature-card p {
  font-size: 14px;
  line-height: 1.55;
  color: var(--on-surface-variant);
  margin: 0;
}

/* ─── How it works ─────────────────────────────────────────────────── */
.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.how-step {
  background: var(--surface);
  border: 1px solid var(--surface-high);
  border-radius: var(--r-xl);
  padding: 32px 28px;
}
.how-num {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: var(--primary);
  margin-bottom: 16px;
}
.how-step h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.2px;
  margin: 0 0 10px;
  color: var(--on-surface);
}
.how-step p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--on-surface-variant);
  margin: 0;
}

/* ─── Waitlist ─────────────────────────────────────────────────────── */
.waitlist {
  background: var(--surface-low);
}
.waitlist-inner {
  max-width: 640px;
  text-align: center;
}
.waitlist h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.6px;
  margin: 0 0 12px;
  color: var(--on-surface);
}
.waitlist p {
  font-size: 16px;
  color: var(--on-surface-variant);
  margin: 0 0 32px;
  font-weight: 500;
}
.store-badges {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.store-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px 10px 14px;
  background: var(--surface);
  border: 1px solid var(--surface-high);
  border-radius: var(--r-md);
  color: var(--on-surface);
  opacity: 0.55;
  text-decoration: none;
}
.store-badge-live {
  opacity: 1;
  background: #000;
  border-color: #000;
  color: #fff;
  box-shadow:
    0 8px 18px rgba(0, 0, 0, 0.22),
    0 2px 4px rgba(0, 0, 0, 0.08);
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.store-badge-live:hover {
  transform: translateY(-1px);
  box-shadow:
    0 12px 26px rgba(0, 0, 0, 0.28),
    0 2px 4px rgba(0, 0, 0, 0.1);
}
.store-badge svg { width: 26px; height: 26px; }
.store-badge div { display: flex; flex-direction: column; align-items: flex-start; }
.store-badge-pre {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--on-surface-variant);
}
.store-badge-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.2px;
}

/* ─── Footer ───────────────────────────────────────────────────────── */
.footer {
  padding: 36px 0;
  border-top: 1px solid var(--surface-high);
}
.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-brand .wordmark { font-size: 18px; }
.footer-meta {
  font-size: 13px;
  color: var(--on-surface-variant);
}
.footer-links { display: flex; gap: 24px; }
.footer-links a {
  font-size: 13px;
  font-weight: 600;
  color: var(--on-surface-variant);
  transition: color 0.15s;
}
.footer-links a:hover { color: var(--primary); }

/* ─── Mobile ───────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-links { gap: 14px; }
  .nav-links a:not(.btn-ghost-sm) { display: none; }
  .hero { padding: 48px 0 64px; }
  section { padding: 56px 0; }
}