@font-face {
  font-family: 'Inter';
  src: url('./assets/fonts/static/Inter-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('./assets/fonts/static/Inter-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('./assets/fonts/static/Inter-ExtraBold.ttf') format('truetype');
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --clr-orange: hsl(35, 77%, 62%);
  --clr-red: hsl(5, 85%, 63%);
  --clr-off-white: hsl(36, 100%, 99%);
  --clr-grayish-blue: hsl(233, 8%, 79%);
  --clr-dark-grayish-blue: hsl(236, 13%, 42%);
  --clr-very-dark-blue: hsl(240, 100%, 5%);

  --container-max: 1110px;
  --space-1: 8px;
  --space-2: 12px;
  --space-3: 16px;
  --space-4: 20px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 40px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, 'Apple Color Emoji', 'Segoe UI Emoji';
  background-color: var(--clr-off-white);
  color: var(--clr-very-dark-blue);
  line-height: 1.6;
}

.container {
  width: min(100%, calc(var(--container-max) + var(--space-6)));
  margin-inline: auto;
  padding-inline: var(--space-3);
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-6);
}

.brand img { display: block; }

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-6);
}

.site-nav a {
  text-decoration: none;
  color: var(--clr-dark-grayish-blue);
}
.site-nav a:hover { color: var(--clr-red); }

/* Mobile nav */
.nav-toggle { display: none; }
.nav-toggle-btn { display: none; cursor: pointer; }
.backdrop { display: none; }

@media (max-width: 767.98px) {
  .nav-toggle-btn { display: block; }
  .site-nav {
    position: fixed;
    top: 0;
    right: -260px;
    width: 260px;
    height: 100dvh;
    background: white;
    padding: var(--space-6);
    transition: right 200ms ease;
    z-index: 20;
  }
  .site-nav ul { flex-direction: column; gap: var(--space-4); margin-top: 80px; }
  .backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 10;
  }
  #nav-toggle:checked ~ .site-nav { right: 0; }
  #nav-toggle:checked ~ .backdrop { display: block; }
  .nav-toggle-btn {
    position: relative;
    z-index: 30;
  }
  .nav-toggle-btn .icon-close { display: none; }
  #nav-toggle:checked + .nav-toggle-btn .icon-open { display: none; }
  #nav-toggle:checked + .nav-toggle-btn .icon-close { display: inline; }
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .grid {
    grid-template-columns: 2fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--space-7);
    align-items: start;
  }
  .hero { grid-column: 1 / 2; }
  .sidebar { grid-column: 2 / 3; align-self: stretch; }
  .articles { grid-column: 1 / 3; }
}

/* Hero */
.hero-image {
  width: 100%;
  height: auto;
  display: block;
}
.hero-content {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-5);
}
@media (min-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}
.hero-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.05;
  font-weight: 800;
  margin: 0;
}
.hero-body p {
  color: var(--clr-dark-grayish-blue);
  margin-top: 0;
}
.btn {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 4px;
  padding: 12px 24px;
  text-decoration: none;
  font-weight: 700;
}
.btn-primary {
  background: var(--clr-red);
  color: white;
}
.btn-primary:hover { background: var(--clr-very-dark-blue); }

/* Sidebar */
.sidebar {
  background: var(--clr-very-dark-blue);
  color: var(--clr-off-white);
  padding: var(--space-6);
}
.sidebar h2 {
  color: var(--clr-orange);
  margin: 0 0 var(--space-4);
  font-size: 2rem;
}
.sidebar-item p { color: var(--clr-grayish-blue); margin-top: var(--space-2); }
.sidebar-link { color: var(--clr-off-white); text-decoration: none; font-weight: 700; display: inline-block; }
.sidebar-link:hover { color: var(--clr-orange); }
.sidebar hr { border: none; border-top: 1px solid rgba(255,255,255,0.2); margin: var(--space-5) 0; }

/* Articles */
.articles {
  display: grid;
  gap: var(--space-6);
}
@media (min-width: 768px) {
  .articles {
    grid-template-columns: repeat(3, 1fr);
  }
}
.card { display: grid; grid-template-columns: 100px 1fr; gap: var(--space-4); align-items: start; }
.card-thumb { width: 100%; height: 100%; object-fit: cover; display: block; }
.card-body { display: grid; gap: var(--space-2); }
.card-index { color: var(--clr-grayish-blue); font-weight: 800; font-size: 2rem; line-height: 1; }
.card-title { text-decoration: none; color: var(--clr-very-dark-blue); font-weight: 800; }
.card-title:hover { color: var(--clr-red); }
.card-text { color: var(--clr-dark-grayish-blue); margin: 0; }

/* Footer */
.attribution { font-size: 11px; text-align: center; color: var(--clr-dark-grayish-blue); padding-block: var(--space-7); }
.attribution a { color: hsl(228, 45%, 44%); }