/* ==========================================================================
   IDGRAM — Global Front-End Stylesheet
   Centralized layout, typography, and grid system
   Author: Gert van Duinen
   ========================================================================== */

/* === VARIABLES ========================================================== */
:root{
  --container-max: 72rem;    /* 1152px ~ max-w-6xl */
  --container-px: 1.5rem;    /* 24px */
  --grid-gap:     0.75rem;   /* 12px */
  --card-radius:  0.75rem;   /* 12px */
}
.container {
  max-width: var(--container-max);
  padding-left: var(--container-px);
  padding-right: var(--container-px);
  margin-left: auto; margin-right: auto;
}
.marks-grid { gap: var(--grid-gap); }
.mark-card { border-radius: var(--card-radius); }

:root {
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --color-bg: #fafafa;
  --color-text: #111;
  --color-muted: #777;
  --color-border: #e0e0e0;
  --color-accent: #111;
  --color-accent-light: #333;
  --radius: 10px;
  --grid-gap: 1.2rem;
  --container-max: 1200px;
  --transition: all 0.2s ease;
}

/* === GLOBAL RESET / BASE =============================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}

/* === CONTAINERS ========================================================= */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1rem;
}

header.site-header {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}

main.site-main {
  padding: 2rem 1rem;
}

/* === GRID SYSTEM ======================================================== */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--grid-gap);
}

.logo-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.logo-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}
.logo-card img {
  width: 100%;
  height: auto;
  object-fit: contain;
  aspect-ratio: 1 / 1;
  padding: 1rem;
}

/* === TYPOGRAPHY ========================================================= */
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  margin: 0 0 0.5em;
}
p, li {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* === COLLECTIONS + FILTER BAR =========================================== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.filter-bar .tag-input {
  flex: 1 1 240px;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
}

.filter-bar .collection-select {
  min-width: 160px;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  font-size: 0.9rem;
}

/* === FOOTER ============================================================= */
footer.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.8rem;
}

/* === UTILITY CLASSES ==================================================== */
.text-muted { color: var(--color-muted); }
.hidden { display: none !important; }
.center { text-align: center; }
.uppercase { text-transform: uppercase; }
.bold { font-weight: 600; }

/* === RESPONSIVE ========================================================= */
@media (max-width: 640px) {
  :root { --grid-gap: 0.8rem; }
  main.site-main { padding: 1.5rem 0.5rem; }
}