/*
  Kleine AT static site styles
  - Light blue / purple color scheme
  - Accessible defaults (contrast, focus, reduced motion)
*/

:root {
  --color-bg: #ffffff;
  --color-text: #0f1226; /* very dark indigo */
  --color-muted: #5b607a; /* slate indigo */
  --color-surface: #f6f7ff; /* faint indigo tint */
  --color-border: #e3e6ff; /* light indigo border */
  --color-primary: #5a67d8; /* indigo-500 */
  --color-primary-600: #4c51bf; /* indigo-600 */
  --color-primary-50: #eef2ff;
  --color-accent: #7c3aed; /* violet */

  --radius-sm: 8px;
  --radius-md: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 18, 38, 0.06), 0 1px 8px rgba(15, 18, 38, 0.04);

  --container: 1120px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 28px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
}

/* Base typography */
html { box-sizing: border-box; }
*, *::before, *::after { box-sizing: inherit; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

.h1 { font-size: 2.25rem; line-height: 1.2; margin: 0 0 var(--space-4); }
.h2 { font-size: 1.75rem; line-height: 1.3; margin: 0 0 var(--space-4); }
.h3 { font-size: 1.25rem; line-height: 1.4; margin: 0 0 var(--space-3); }
.h4 { font-size: 1.1rem; line-height: 1.4; margin: 0 0 var(--space-2); }
.lead { font-size: 1.125rem; color: var(--color-muted); margin: 0 0 var(--space-3); }
.muted { color: var(--color-muted); }
.small { font-size: 0.9rem; }
.mt-2 { margin-top: var(--space-2); }

a { color: var(--color-primary-600); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.container {
  width: min(100%, calc(var(--container) + var(--space-8)));
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.section { padding: var(--space-10) 0; }
.section--hero { padding-top: var(--space-12); }

.grid { display: grid; gap: var(--space-8); }
.grid--2 { grid-template-columns: 1fr; }
@media (min-width: 900px) { .grid--2 { grid-template-columns: 1.3fr 1fr; } }

.narrow { max-width: 760px; }
.stack > * + * { margin-top: var(--space-4); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }

.brand { display: inline-flex; align-items: center; gap: var(--space-3); font-weight: 600; letter-spacing: 0.2px; }
.brand__icon {
  width: 28px; height: 28px; display: inline-grid; place-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: white; border-radius: 999px; font-weight: 700;
}
.brand__text { color: var(--color-text); }

.nav { display: flex; align-items: center; gap: var(--space-4); }
.nav__list { list-style: none; display: flex; gap: var(--space-2); padding: 0; margin: 0; }
.nav__link { display: inline-block; padding: 8px 10px; border-radius: var(--radius-sm); }
.nav__link:hover { background: var(--color-primary-50); text-decoration: none; }
.nav__link.is-active { color: var(--color-primary-600); font-weight: 600; }
.nav__cta { margin-left: var(--space-2); display:none; }

.nav-toggle { display: none; border: 0; background: transparent; }
.nav-toggle__bar { display: block; width: 24px; height: 2px; background: var(--color-text); margin: 5px 0; }

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .nav { position: fixed; inset: 64px 0 auto 0; background: var(--color-bg); border-bottom: 1px solid var(--color-border); display: none; }
  .nav.open { display: block; }
  .nav__list { flex-direction: column; padding: var(--space-4); }
  .nav__cta { display: inline-block; margin: var(--space-4); }
}

/* Buttons */
.button {
  --btn-bg: #ffffff; --btn-fg: var(--color-text); --btn-border: var(--color-border);
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--btn-border); color: var(--btn-fg); background: var(--btn-bg);
  box-shadow: var(--shadow-sm);
}
.button:hover { text-decoration: none; background: var(--color-surface); }
.button--primary { --btn-bg: var(--color-primary); --btn-fg: #fff; --btn-border: transparent; }
.button--primary:hover { background: var(--color-primary-600); }
.button--block { width: 100%; }

/* Cards */
.card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.card--highlight { background: linear-gradient(180deg, var(--color-primary-50), #fff 45%); }
.card__header { padding: var(--space-5) var(--space-6) var(--space-2); border-bottom: 1px solid var(--color-border); background: transparent; }
.card__body { padding: var(--space-6); }
.card__footer { padding: var(--space-5) var(--space-6); border-top: 1px solid var(--color-border); }

.icon-list { padding-left: 0; list-style: none; }
.icon-list li { display: flex; gap: 10px; align-items: center; padding: 6px 0; color: var(--color-muted); }

/* Tables */
.table-wrapper { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.table { width: 100%; border-collapse: collapse; background: #fff; }
.table th, .table td { padding: 12px 16px; border-bottom: 1px solid var(--color-border); }
.table thead th { text-align: left; background: var(--color-surface); font-weight: 600; }
.table tr:nth-child(even) td { background: #fafaff; }

/* Footer */
.site-footer { border-top: 1px solid var(--color-border); padding: var(--space-8) 0; background: #fff; }
.footer__inner { display: grid; gap: var(--space-4); }
.footer__nav { list-style: none; display: flex; gap: var(--space-4); padding: 0; margin: 0; }

/* Skip link */
.skip-link {
  position: absolute; left: -999px; top: -999px; background: var(--color-primary); color: #fff; padding: 8px 12px; border-radius: var(--radius-sm);
}
.skip-link:focus { left: 12px; top: 12px; }

/* Utilities */
.actions { display: flex; gap: var(--space-3); margin-top: var(--space-6); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* Focus ring */
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; border-radius: 6px; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}