/* ============================================
   Mac Media Keys Forwarder — Landing Page
   ============================================ */

/* --- Reset & Base --- */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* --- Design Tokens --- */

:root {
  --color-bg: #FAFAFA;
  --color-bg-alt: #F2F2F7;
  --color-surface: #FFFFFF;
  --color-text: #1D1D1F;
  --color-text-secondary: #6E6E73;
  --color-accent: #0071E3;
  --color-accent-hover: #0077ED;
  --color-border: #E5E5EA;
  --color-callout-bg: #FFFFFF;
  --color-callout-border: #D1D1D6;

  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.12);
  --shadow-btn: 0 1px 2px rgba(0, 0, 0, 0.08);
  --shadow-btn-hover: 0 2px 8px rgba(0, 0, 0, 0.12);
  --shadow-screenshot: 0 8px 30px rgba(0, 0, 0, 0.12);

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --section-padding: 80px;
  --container-width: 960px;
  --container-narrow: 680px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1C1C1E;
    --color-bg-alt: #2C2C2E;
    --color-surface: #2C2C2E;
    --color-text: #F5F5F7;
    --color-text-secondary: #98989D;
    --color-accent: #2997FF;
    --color-accent-hover: #40A9FF;
    --color-border: #38383A;
    --color-callout-bg: #1C1C1E;
    --color-callout-border: #48484A;

    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-btn: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-btn-hover: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-screenshot: 0 8px 30px rgba(0, 0, 0, 0.4);
  }
}

/* --- Base Styles --- */

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  text-decoration: underline;
}

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

/* --- Layout --- */

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--section-padding) 0;
}

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

.section h2 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.section p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.section p:last-child {
  margin-bottom: 0;
}

/* --- Scroll Fade-In Animation --- */

@media (prefers-reduced-motion: no-preference) {
  .section,
  .hero {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
  }

  .section.visible,
  .hero.visible {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .section,
  .hero {
    opacity: 1;
    transform: none;
  }
}

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  font-family: var(--font-sans);
  text-decoration: none;
  transition: all 150ms ease;
  cursor: pointer;
  border: none;
}

.btn:hover {
  text-decoration: none;
}

.btn svg {
  flex-shrink: 0;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  box-shadow: var(--shadow-btn-hover);
  transform: scale(1.02);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-btn);
}

.btn-secondary:hover {
  box-shadow: var(--shadow-btn-hover);
  transform: scale(1.02);
}

.btn-coffee {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-btn);
}

.btn-coffee:hover {
  border-color: #FFDD00;
  box-shadow: 0 2px 8px rgba(255, 221, 0, 0.2);
  transform: scale(1.02);
}

/* --- Hero --- */

.hero {
  padding: 100px 0 var(--section-padding);
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-content {
  flex: 1;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 18px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hero-meta {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.hero-screenshot {
  flex-shrink: 0;
}

.hero-screenshot img {
  border-radius: 10px;
  box-shadow: var(--shadow-screenshot);
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.feature-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 150ms ease, transform 150ms ease;
}

.feature-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--color-accent);
}

@media (prefers-color-scheme: dark) {
  .feature-icon {
    background-color: var(--color-bg);
  }
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 0;
}

/* --- Steps --- */

.steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-top: 40px;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}

.step-content p {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* --- Callout --- */

.callout {
  background-color: var(--color-callout-bg);
  border: 1px solid var(--color-callout-border);
  border-radius: 12px;
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.callout h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.callout p {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* --- Support Section --- */

.support-section {
  text-align: center;
}

.support-section p {
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 24px;
}

/* --- Footer --- */

.footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.footer p {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-align: center;
}

.footer a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

/* --- Responsive --- */

@media (max-width: 959px) {
  :root {
    --section-padding: 56px;
  }

  .hero {
    padding-top: 72px;
  }

  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-sub {
    max-width: none;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-screenshot img {
    max-width: 320px;
    margin: 0 auto;
  }
}

@media (max-width: 599px) {
  :root {
    --section-padding: 40px;
  }

  body {
    font-size: 16px;
  }

  .hero {
    padding-top: 56px;
  }

  .section h2 {
    font-size: 26px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    justify-content: center;
    width: 100%;
  }

  .hero-screenshot img {
    max-width: 280px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .callout {
    padding: 24px;
  }

  .step {
    gap: 16px;
  }
}