/* ============================================================
   SHEEN — sheen.biste.cc
   Design: Dark-first, native macOS aesthetic
   Accent: #0066CC
   Font: -apple-system / SF Pro
   ============================================================ */

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

:root {
  /* Accent */
  --accent: #0066CC;
  --accent-hover: #0055AA;
  --accent-active: #004499;

  /* Dark palette (default) */
  --bg: #0d0d0f;
  --bg-alt: #141416;
  --bg-card: #1a1a1e;
  --bg-card-border: rgba(255, 255, 255, 0.07);
  --text-primary: #f0f0f2;
  --text-secondary: rgba(240, 240, 242, 0.60);
  --text-tertiary: rgba(240, 240, 242, 0.36);
  --border: rgba(255, 255, 255, 0.08);
  --placeholder-bg: #1e1e24;
  --placeholder-border: rgba(255, 255, 255, 0.10);
  --placeholder-text: rgba(240, 240, 242, 0.30);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
  --warning-bg: rgba(255, 184, 0, 0.12);
  --warning-border: rgba(255, 184, 0, 0.28);
  --warning-text: #ffd36e;
  --offer-pill-bg: rgba(255, 255, 255, 0.04);
  --offer-pill-border: rgba(255, 255, 255, 0.1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f7f9;
    --bg-alt: #ffffff;
    --bg-card: #ffffff;
    --bg-card-border: rgba(0, 0, 0, 0.06);
    --text-primary: #1a1a1e;
    --text-secondary: rgba(26, 26, 30, 0.60);
    --text-tertiary: rgba(26, 26, 30, 0.36);
    --border: rgba(0, 0, 0, 0.08);
    --placeholder-bg: #e8e8ee;
    --placeholder-border: rgba(0, 0, 0, 0.08);
    --placeholder-text: rgba(26, 26, 30, 0.30);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.12);
    --warning-bg: rgba(168, 106, 0, 0.10);
    --warning-border: rgba(168, 106, 0, 0.20);
    --warning-text: #8c4a00;
    --offer-pill-bg: rgba(0, 0, 0, 0.025);
    --offer-pill-border: rgba(0, 0, 0, 0.08);
  }
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ---- Typography ---- */
h1, h2, h3 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ---- Layout ---- */
.section-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- CTA Button ---- */
.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #ffffff;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 14px 28px;
  border-radius: 12px;
  border: 0;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease, opacity 0.15s ease;
  cursor: pointer;
  white-space: nowrap;
  appearance: none;
  box-shadow: 0 2px 8px rgba(0, 102, 204, 0.35);
}

.cta-button:hover {
  background: var(--accent-hover);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 102, 204, 0.45);
}

.cta-button:active {
  background: var(--accent-active);
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(0, 102, 204, 0.25);
}

.cta-button:focus-visible,
.footer-links a:focus-visible,
.privacy-content a:focus-visible,
.brand-link:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 72%, #ffffff 28%);
  outline-offset: 3px;
  text-decoration: none;
}

.cta-button:disabled,
.cta-button[aria-disabled="true"] {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
  box-shadow: 0 2px 8px rgba(0, 102, 204, 0.18);
}

.cta-button--small {
  font-size: 15px;
  padding: 9px 18px;
  border-radius: 9px;
}

.cta-button--hero {
  font-size: 18px;
  padding: 16px 34px;
  border-radius: 14px;
}

.cta-button--large {
  font-size: 18px;
  padding: 18px 40px;
  border-radius: 14px;
  width: 100%;
  max-width: 360px;
}

/* ============================================================
   NAV
============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
}

/* ============================================================
   BRAND LOCKUP
============================================================ */
.brand-link {
  display: inline-flex;
  align-items: center;
  color: inherit;
  text-decoration: none;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-lockup--footer {
  gap: 12px;
}

.brand-mark {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  display: block;
  border-radius: 6px;
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--border) 80%, transparent),
    0 6px 16px rgba(0, 0, 0, 0.16);
}

.brand-mark--eyebrow {
  width: 16px;
  height: 16px;
  flex-basis: 16px;
  border-radius: 5px;
}

.nav-logo {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* ============================================================
   HERO
============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 80px; /* nav height */
  background: var(--bg);
}

.hero-content {
  text-align: center;
  padding: 80px 24px 60px;
  max-width: 700px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg-alt) 72%, transparent);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.hero-headline {
  font-size: clamp(44px, 7vw, 72px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-subheadline {
  font-size: clamp(19px, 2.5vw, 22px);
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-weight: 400;
  line-height: 1.4;
}

.hero-footnote {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-tertiary);
}

.hero-offer-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 22px;
}

.hero-offer-list li {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--offer-pill-border);
  background: var(--offer-pill-bg);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.hero-screenshot {
  width: 100%;
  max-width: 1080px;
  padding: 0 24px 80px;
}

/* ============================================================
   SCREENSHOTS / PLACEHOLDERS
============================================================ */
.screenshot-placeholder {
  background: var(--placeholder-bg);
  border: 1px solid var(--placeholder-border);
  border-radius: 16px;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.screenshot-placeholder::before {
  content: "PLACEHOLDER";
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--placeholder-text);
  background: var(--bg-card-border);
  padding: 3px 8px;
  border-radius: 4px;
  text-transform: uppercase;
}

.screenshot-placeholder--hero {
  aspect-ratio: 16 / 9;
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.screenshot-placeholder--dark {
  background: #141418;
}

.placeholder-label {
  font-size: 13px;
  color: var(--placeholder-text);
  text-align: center;
  padding: 24px;
  max-width: 300px;
  line-height: 1.5;
}

.screenshot-grid {
  display: grid;
  gap: 20px;
  margin-top: 48px;
}

.screenshot-grid--three {
  grid-template-columns: repeat(3, 1fr);
}

.screenshot-grid--two {
  grid-template-columns: repeat(2, 1fr);
}

/* ============================================================
   SECTION COMMON
============================================================ */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-headline {
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-body {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ============================================================
   SHOWCASE
============================================================ */
.showcase {
  padding: 96px 0;
  background: var(--bg);
}

.showcase--alt {
  background: var(--bg-alt);
}

/* ---- Callouts ---- */
.feature-callouts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 56px;
}

.callout {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.callout-icon {
  font-size: 22px;
  margin-bottom: 4px;
}

.callout strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.callout p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ============================================================
   FEATURE GRID
============================================================ */
.features {
  padding: 96px 0;
  background: var(--bg-alt);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  background: var(--border);
  border-radius: 20px;
  overflow: hidden;
}

.feature-card {
  background: var(--bg-card);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background 0.15s ease;
}

.feature-card:hover {
  background: color-mix(in srgb, var(--bg-card) 95%, var(--accent) 5%);
}

.feature-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 4px;
}

.feature-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ============================================================
   THEMES
============================================================ */
.theme-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 40px;
}

.theme-chip {
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--bg-card);
}

.theme-chip--default { border-color: #0066CC33; color: #0066CC; }
.theme-chip--dark { border-color: #ffffff20; color: var(--text-secondary); background: #1a1a1e; }
.theme-chip--solarized { border-color: #b5890033; color: #b58900; }
.theme-chip--nord { border-color: #5e81ac33; color: #5e81ac; }
.theme-chip--dracula { border-color: #bd93f933; color: #bd93f9; }

/* ============================================================
   PRICING
============================================================ */
.pricing {
  padding: 96px 0;
  background: var(--bg);
}

.pricing-card {
  max-width: 440px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: 24px;
  padding: 48px 40px;
  text-align: center;
  box-shadow: var(--shadow);
}

.pricing-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0, 102, 204, 0.12);
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.pricing-amount {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  font-size: 72px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 12px;
}

.pricing-amount--offer {
  font-size: clamp(48px, 6vw, 64px);
  line-height: 0.92;
  margin-bottom: 18px;
}

.pricing-qualifier {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.pricing-list {
  list-style: none;
  text-align: left;
  margin-bottom: 36px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing-list li {
  font-size: 15px;
  color: var(--text-secondary);
  padding-left: 24px;
  position: relative;
}

.pricing-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.pricing-footnote {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ============================================================
   FOOTER
============================================================ */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 40px 0;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-logo {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.footer-platform {
  font-size: 13px;
  color: var(--text-tertiary);
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
}

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

.footer-copy p {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ============================================================
   SCREENSHOT IMAGES
============================================================ */
.screenshot-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 16px;
  display: block;
}

.hero-screenshot .screenshot-img {
  border-radius: 20px;
  box-shadow: var(--shadow);
  aspect-ratio: 16 / 10;
}

.screenshot-grid .screenshot-img {
  aspect-ratio: 16 / 10;
}

/* ============================================================
   PRIVACY PAGE
============================================================ */
.privacy-page {
  padding-top: 100px;
  padding-bottom: 80px;
  min-height: 100vh;
}

.privacy-content {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
}

.privacy-content h1 {
  font-size: clamp(32px, 4.5vw, 44px);
  letter-spacing: -0.025em;
  margin-bottom: 12px;
}

.privacy-content .privacy-updated {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-bottom: 48px;
}

.privacy-content h2 {
  font-size: 22px;
  letter-spacing: -0.02em;
  margin-top: 40px;
  margin-bottom: 12px;
}

.privacy-content p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.privacy-content ul {
  list-style: none;
  padding: 0;
  margin-bottom: 16px;
}

.privacy-content ul li {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: 24px;
  position: relative;
  margin-bottom: 8px;
}

.privacy-content ul li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--text-tertiary);
}

.privacy-content a {
  color: var(--accent);
}

.privacy-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .screenshot-grid--three {
    grid-template-columns: repeat(2, 1fr);
  }

  .screenshot-grid--three .screenshot-placeholder:last-child,
  .screenshot-grid--three > *:last-child {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .nav {
    padding: 14px 20px;
  }

  .hero-content {
    padding: 56px 20px 40px;
  }

  .hero-screenshot {
    padding: 0 16px 56px;
  }

  .section-inner {
    padding: 0 20px;
  }

  .showcase,
  .features,
  .pricing {
    padding: 64px 0;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .screenshot-grid--three {
    grid-template-columns: 1fr;
  }

  .screenshot-grid--three .screenshot-placeholder:last-child,
  .screenshot-grid--three > *:last-child {
    grid-column: auto;
  }

  .screenshot-grid--two {
    grid-template-columns: 1fr;
  }

  .feature-callouts {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-offer-list {
    gap: 10px;
  }

  .pricing-card {
    padding: 36px 24px;
  }

  .pricing-amount {
    font-size: 56px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .cta-button--hero {
    width: 100%;
    justify-content: center;
  }

  .cta-button--large {
    max-width: 100%;
  }

}