/* ==========================================================================
   Arpie Studios — base styles
   Mobile-first; larger breakpoints layered on with min-width queries.
   ========================================================================== */

/* --- Design tokens ------------------------------------------------------- */
:root {
  /* Colors (light) */
  --color-bg: #ffffff;
  --color-bg-alt: #f4f4f6;
  --color-text: #1a1a1f;
  --color-text-muted: #5c5c66;
  --color-accent: #5b4bff;
  --color-accent-contrast: #ffffff;
  --color-border: #e2e2e8;

  /* Typography */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --font-size-base: 1rem;
  --line-height-base: 1.6;

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  /* Layout */
  --container-max: 64rem;
  --radius: 0.5rem;

  color-scheme: light dark;
}

/* Dark mode follows the OS setting */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111114;
    --color-bg-alt: #1b1b20;
    --color-text: #ececf1;
    --color-text-muted: #a0a0ab;
    --color-accent: #8a7dff;
    --color-accent-contrast: #111114;
    --color-border: #2c2c33;
  }
}

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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

ul[class] {
  list-style: none;
  padding: 0;
}

/* --- Base typography ----------------------------------------------------- */
h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  margin-bottom: var(--space-md);
}

p + p {
  margin-top: var(--space-md);
}

a {
  color: var(--color-accent);
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Layout -------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section {
  padding-block: var(--space-xl);
}

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

/* --- Header -------------------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-block: var(--space-md);
}

.logo {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
}

.nav-list {
  display: flex;
  gap: var(--space-md);
}

.nav-list a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.nav-list a:hover {
  color: var(--color-text);
}

/* --- Hero ---------------------------------------------------------------- */
.hero {
  padding-block: var(--space-xl);
  text-align: center;
}

.lead {
  max-width: 40rem;
  margin: var(--space-md) auto var(--space-lg);
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

/* --- Button -------------------------------------------------------------- */
.button {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius);
  background-color: var(--color-accent);
  color: var(--color-accent-contrast);
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  filter: brightness(1.1);
}

/* --- Footer -------------------------------------------------------------- */
.site-footer {
  padding-block: var(--space-lg);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  text-align: center;
}

/* --- 404 ----------------------------------------------------------------- */
.not-found {
  min-height: 60vh;
  display: grid;
  place-content: center;
  text-align: center;
}

.not-found p {
  margin-block: var(--space-md) var(--space-lg);
  color: var(--color-text-muted);
}

/* --- Larger screens ------------------------------------------------------ */
@media (min-width: 48rem) {
  .container {
    padding-inline: var(--space-lg);
  }

  .hero {
    padding-block: calc(var(--space-xl) * 2);
  }
}