/* ==========================================================================
   surakarta.eu – Basis-Layer
   Reset, Grund-Typo, Skip-Link, Header/Nav/Footer (Lead-Markup-Vertrag),
   Focus-Visible, allgemeine Layout-Strukturen.
   ========================================================================== */

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

* {
  margin: 0;
}

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

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: var(--sk-font-sans);
  font-size: var(--sk-font-base);
  line-height: var(--sk-lh-body);
  color: var(--sk-text);
  background-color: var(--sk-bg);
  background-image:
    radial-gradient(1100px 480px at 85% -10%, var(--sk-accent2-soft), transparent 65%),
    radial-gradient(900px 520px at -10% 0%, var(--sk-accent-soft), transparent 60%);
  background-attachment: fixed;
  transition: background-color var(--sk-dur-slow) var(--sk-ease-out),
    color var(--sk-dur-slow) var(--sk-ease-out);
}

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

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

a {
  color: var(--sk-link);
  text-decoration: none;
  transition: color var(--sk-dur-fast) var(--sk-ease-out);
}
a:hover {
  color: var(--sk-text-strong);
}

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

h1, h2, h3, h4 {
  line-height: var(--sk-lh-tight);
  color: var(--sk-text-strong);
  overflow-wrap: break-word;
  text-wrap: balance;
}

p {
  overflow-wrap: break-word;
}

/* ---------- Fokus sichtbar (WCAG 2.4.7) ---------- */
:focus-visible {
  outline: 2px solid var(--sk-focus-ring);
  outline-offset: 2px;
  border-radius: var(--sk-radius-sm);
}

/* ---------- Skip-Link ---------- */
.sk-skip-link {
  position: absolute;
  left: var(--sk-space-4);
  top: -100px;
  z-index: var(--sk-z-modal);
  padding: var(--sk-space-3) var(--sk-space-5);
  background: var(--sk-surface-2);
  border: 1px solid var(--sk-border-strong);
  border-radius: var(--sk-radius-md);
  color: var(--sk-text-strong);
  font-weight: 600;
  box-shadow: var(--sk-shadow-md);
  transition: top var(--sk-dur-fast) var(--sk-ease-out);
}
.sk-skip-link:focus-visible {
  top: var(--sk-space-3);
}

/* ---------- Header ---------- */
.sk-header {
  position: sticky;
  top: 0;
  z-index: var(--sk-z-header);
  background: color-mix(in srgb, var(--sk-bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--sk-border);
}

.sk-header-inner {
  max-width: var(--sk-content-max);
  margin-inline: auto;
  height: var(--sk-header-h);
  padding-inline: clamp(var(--sk-space-4), 3vw, var(--sk-space-6));
  display: flex;
  align-items: center;
  gap: var(--sk-space-5);
}

.sk-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sk-space-2);
  color: var(--sk-text-strong);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.sk-brand:hover {
  color: var(--sk-accent-text);
}

.sk-logo {
  width: 34px;
  height: 34px;
  color: var(--sk-accent);
  flex: none;
}

.sk-brand-text {
  font-size: 1.15rem;
  display: inline-flex;
  align-items: baseline;
}
.sk-brand-tld {
  color: var(--sk-accent2-text);
  font-size: 0.82em;
  margin-left: 1px;
}

.sk-nav {
  display: flex;
  align-items: center;
  gap: var(--sk-space-1);
  margin-left: var(--sk-space-2);
  flex: 1;
  min-width: 0;
}

.sk-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: var(--sk-space-2) var(--sk-space-3);
  border-radius: var(--sk-radius-md);
  color: var(--sk-muted);
  font-weight: 550;
  font-size: var(--sk-font-sm);
  white-space: nowrap;
  transition: background-color var(--sk-dur-fast) var(--sk-ease-out),
    color var(--sk-dur-fast) var(--sk-ease-out);
}
.sk-nav a:hover {
  background: var(--sk-surface-2);
  color: var(--sk-text-strong);
}
.sk-nav .sk-nav-active {
  color: var(--sk-accent-text);
  background: var(--sk-accent-soft);
}
.sk-nav .sk-nav-active:hover {
  color: var(--sk-accent-text);
  background: var(--sk-accent-soft);
}

.sk-header-actions {
  display: flex;
  align-items: center;
  gap: var(--sk-space-2);
  margin-left: auto;
}

.sk-lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 36px;
  padding-inline: var(--sk-space-3);
  border: 1px solid var(--sk-border);
  border-radius: var(--sk-radius-md);
  background: var(--sk-surface);
  color: var(--sk-muted);
  font-size: var(--sk-font-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: border-color var(--sk-dur-fast) var(--sk-ease-out),
    color var(--sk-dur-fast) var(--sk-ease-out),
    background-color var(--sk-dur-fast) var(--sk-ease-out);
}
.sk-lang-switch:hover {
  color: var(--sk-text-strong);
  border-color: var(--sk-border-strong);
  background: var(--sk-surface-2);
}

.sk-user-slot {
  display: contents; /* Reiner Mount-Punkt: keine eigene Box, damit Header-Kinder
                       direkt als Flex-Items fließen (keine Container-Überlappung) */
}

/* ---------- Main ---------- */
.sk-main {
  flex: 1;
  width: 100%;
  max-width: var(--sk-content-max);
  margin-inline: auto;
  padding: var(--sk-space-5) clamp(var(--sk-space-4), 3vw, var(--sk-space-6)) var(--sk-space-8);
}

/* ---------- Footer ---------- */
.sk-footer {
  border-top: 1px solid var(--sk-border);
  background: color-mix(in srgb, var(--sk-bg-soft) 75%, transparent);
}

.sk-footer-inner {
  max-width: var(--sk-content-max);
  margin-inline: auto;
  padding: var(--sk-space-6) clamp(var(--sk-space-4), 3vw, var(--sk-space-6)) var(--sk-space-5);
  display: grid;
  gap: var(--sk-space-3);
}

.sk-footer-tagline {
  color: var(--sk-text);
  font-size: var(--sk-font-sm);
  max-width: 46ch;
}

.sk-footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sk-space-1) var(--sk-space-5);
}
.sk-footer-nav a {
  color: var(--sk-muted);
  font-size: var(--sk-font-sm);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}
.sk-footer-nav a:hover {
  color: var(--sk-accent-text);
}

.sk-footer-copy {
  color: var(--sk-faint);
  font-size: var(--sk-font-xs);
}

/* ---------- Grund-Typo-Hierarchie ---------- */
.sk-h1 {
  font-size: var(--sk-font-3xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--sk-space-4);
}
.sk-h2 {
  font-size: var(--sk-font-2xl);
  font-weight: 750;
  letter-spacing: -0.015em;
  margin-bottom: var(--sk-space-3);
}
.sk-h3 {
  font-size: var(--sk-font-xl);
  font-weight: 700;
  margin-bottom: var(--sk-space-2);
}
.sk-h4 {
  font-size: var(--sk-font-lg);
  font-weight: 650;
  margin-bottom: var(--sk-space-2);
}

.sk-lead {
  font-size: var(--sk-font-lg);
  color: var(--sk-muted);
  max-width: 62ch;
}

/* ---------- Utilities ---------- */
.sk-visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.sk-hidden {
  display: none !important;
}

/* ---------- Bewegung reduzieren (WCAG 2.3.3) ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Mobile Navigation (Hamburger) ---------- */
.sk-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--sk-border);
  border-radius: var(--sk-radius-md);
  background: var(--sk-surface);
  color: var(--sk-text);
  cursor: pointer;
}
.sk-nav-toggle:hover {
  background: var(--sk-surface-2);
}
.sk-nav-toggle svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 860px) {
  .sk-nav-toggle {
    display: inline-flex;
  }
  .sk-nav {
    position: fixed;
    inset: var(--sk-header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--sk-space-1);
    padding: var(--sk-space-3) var(--sk-space-4) var(--sk-space-5);
    background: var(--sk-bg-soft);
    border-bottom: 1px solid var(--sk-border);
    box-shadow: var(--sk-shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--sk-dur-base) var(--sk-ease-out),
      transform var(--sk-dur-base) var(--sk-ease-out);
  }
  .sk-nav.sk-nav-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .sk-nav a {
    min-height: 46px;
    font-size: var(--sk-font-md);
    padding: var(--sk-space-3) var(--sk-space-3);
  }
}

/* Kompakter Header auf kleinen Displays */
@media (max-width: 560px) {
  .sk-brand-text {
    display: none;
  }
  .sk-header-inner {
    gap: var(--sk-space-2);
    padding-inline: var(--sk-space-3);
  }
  .sk-user-slot .sk-user-register {
    display: none; /* Registrieren ist Tab im Anmelde-Modal */
  }
}