/* =================================================================
   Reset & Base Styles
   Mobile-first. Base rules apply at 0 px upward.
   ================================================================= */

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

* {
  border-color: var(--border);
}

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
}

h1,
h2,
h3,
h4 {
  letter-spacing: -0.02em;
}

a {
  text-decoration: none;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

/* ---- Shared layout ---- */
.container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---- Shared buttons ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 9999px;
  background-color: var(--primary);
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-foreground);
  transition: filter 0.15s;
  white-space: nowrap;
}

.btn-primary:hover {
  filter: brightness(0.95);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 9999px;
  border: 1px solid oklch(0.18 0.02 260 / 20%);
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--foreground);
  transition: border-color 0.15s;
  white-space: nowrap;
}

.btn-outline:hover {
  border-color: oklch(0.18 0.02 260 / 60%);
}

/* ---- Shared section spacing (mobile) ---- */
.section-padding {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.section-padding-lg {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

/* ---- Responsive: sm 480 px+ ---- */
@media (min-width: 480px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .btn-primary,
  .btn-outline {
    padding: 0.875rem 1.5rem;
  }
}

/* ---- Responsive: md 768 px+ ---- */
@media (min-width: 768px) {
  .section-padding {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }

  .section-padding-lg {
    padding-top: 7rem;
    padding-bottom: 7rem;
  }
}