/* ============================================
   atmosphere.community — Design System
   Default theme: "horizon" - warm, breezy, people-forward
   Layering:
     tokens.base       — base tokens, themes redefine here
     tokens.semantic   — semantic mappings (theme-agnostic)
     tokens.components — scoped component tokens
     global            — reset, base elements, components
   ============================================ */

@import "./tokens.base.css";
@import "./tokens.semantic.css";
@import "./tokens.components.css";

/* --- Structural tokens (NOT themed) --- */
:root {
  /* --- Spacing (4pt base) --- */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-base: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* --- Typography --- */
  --font-display: "Bitter", Georgia, serif;
  --font-body: "Source Sans 3", "Source Sans Pro", system-ui, sans-serif;

  --text-xs: clamp(0.65rem, 0.6rem + 0.2vw, 0.75rem);
  --text-sm: clamp(0.78rem, 0.74rem + 0.2vw, 0.875rem);
  --text-base: clamp(0.875rem, 0.84rem + 0.2vw, 1rem);
  --text-lg: clamp(1.1rem, 1rem + 0.3vw, 1.25rem);
  --text-xl: clamp(1.4rem, 1.2rem + 0.6vw, 1.75rem);
  --text-2xl: clamp(1.75rem, 1.4rem + 1vw, 2.25rem);

  --leading-tight: 1.2;
  --leading-normal: 1.55;
  --leading-relaxed: 1.7;

  /* --- Layout --- */
  --content-width: 960px;
  --content-narrow: 720px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* --- Stacking --- */
  --z-content: 1;
  --z-feedback: 5;
  --z-header: 10;
  --z-popover: 20;
  --z-popover-raised: 30;
  --z-top: 100;
}

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

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--foreground);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100dvh;
}

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

a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  color: var(--link-hover);
}
a:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
  border-radius: 2px;
}

a[target="_blank"]:not(.btn):not(.hero-secondary):not(.post-card__link):not(.community-pill--link):not(.highlight-card):not(.event-card__details):not([data-external-icon="hidden"])::after {
  content: "";
  display: inline-block;
  width: 0.95em;
  height: 0.95em;
  margin-inline-start: 0.25em;
  vertical-align: -0.125em;
  background-color: currentColor;
  mask: url("data:image/svg+xml,%3Csvg width='24' height='24' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='black' d='M19 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V7a2 2 0 0 1 2-2h6v2H5v12h12v-6zM13 3v2h4.586l-7.793 7.793l1.414 1.414L19 6.414V11h2V3z'/%3E%3C/svg%3E") center / contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg width='24' height='24' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='black' d='M19 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V7a2 2 0 0 1 2-2h6v2H5v12h12v-6zM13 3v2h4.586l-7.793 7.793l1.414 1.414L19 6.414V11h2V3z'/%3E%3C/svg%3E") center / contain no-repeat;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: var(--leading-tight);
  color: var(--foreground);
  text-wrap: balance;
}

h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
}
h2 {
  font-size: var(--text-xl);
  font-weight: 600;
}
h3 {
  font-size: var(--text-lg);
  font-weight: 600;
}
h4 {
  font-size: var(--text-base);
  font-weight: 600;
}

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

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

@media (min-width: 640px) {
  .container {
    padding-inline: var(--space-2xl);
  }
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Card base --- */
.card {
  background: var(--card);
  color: var(--card-foreground);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: var(--space-base);
}

/* The HTML `hidden` attribute should always win over author display rules. */
[hidden] {
  display: none !important;
}

/* --- Badge / Pill --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.badge--tag {
  background: var(--badge-tag-bg);
  color: var(--badge-tag-fg);
}

.badge--location {
  background: var(--badge-location-bg);
  color: var(--badge-location-fg);
}

.badge--online {
  background: var(--badge-online-bg);
  color: var(--badge-online-fg);
}

/* --- Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-base);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition:
    background 0.15s ease,
    color 0.15s ease,
    border-color 0.15s ease;
  text-decoration: none;
}

.btn--primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
}
.btn--primary:hover {
  background: var(--btn-primary-bg-hover);
  color: var(--btn-primary-fg);
}

.btn--ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--btn-ghost-border);
}
.btn--ghost:hover {
  background: var(--btn-ghost-bg-hover);
  border-color: var(--btn-ghost-border-hover);
}

.btn--small {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--text-xs);
}

/* --- Section spacing --- */
.section {
  padding-block: var(--space-2xl) var(--space-3xl);
}

@media (min-width: 640px) {
  .section {
    padding-block: var(--space-3xl) var(--space-4xl);
  }
}

.section__header {
  margin-bottom: var(--space-xl);
}

.section__title {
  font-size: var(--text-xl);
}

.section__subtitle {
  color: var(--foreground-secondary);
  font-size: var(--text-sm);
  margin-top: var(--space-xs);
}

.section__more {
  font-size: var(--text-sm);
  font-weight: 500;
}

/* --- Grid --- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-base);
}

/* --- Skip link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-base);
  padding: var(--space-sm) var(--space-base);
  background: var(--primary);
  color: var(--primary-foreground);
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: var(--z-top);
}
.skip-link:focus {
  top: var(--space-sm);
}