/* ==========================================================================
   Temeswarer Beiträge zur Germanistik — Design System
   ========================================================================== */

:root {
  /* Colors */
  --color-bg: #F8F9FA;
  --color-surface: #FFFFFF;
  --color-header: #0F172A;
  --color-header-alt: #1E293B;
  --color-text: #334155;
  --color-text-muted: #64748B;
  --color-text-light: #94A3B8;
  --color-link: #1E40AF;
  --color-link-hover: #0F172A;
  --color-accent-gold: #B8860B;
  --color-accent-burgundy: #7F1D1D;
  --color-border: #E2E8F0;
  --color-border-subtle: #F1F5F9;

  /* Typography */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", "Palatino Linotype", serif;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;

  --line-height-tight: 1.25;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Layout */
  --max-width: 960px;
  --sidebar-width: 280px;
  --header-height: auto;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.1);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

/* --------------------------------------------------------------------------
   Links
   -------------------------------------------------------------------------- */

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition);
}

a:hover,
a:focus-visible {
  color: var(--color-accent-burgundy);
}

a:focus-visible {
  outline: 2px solid var(--color-accent-gold);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   Site Wrapper
   -------------------------------------------------------------------------- */

.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  background: linear-gradient(135deg, var(--color-header) 0%, var(--color-header-alt) 100%);
  color: #FFFFFF;
  padding: var(--space-lg) var(--space-md);
  box-shadow: var(--shadow-md);
}

.site-header .site-container {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  position: relative;
}

/* --------------------------------------------------------------------------
   Mobile Menu Toggle
   -------------------------------------------------------------------------- */

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.12);
  cursor: pointer;
  z-index: 1001;
  transition: background-color var(--transition);
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

.menu-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 0 auto;
  background: #FFFFFF;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), width var(--transition);
}

.menu-open .menu-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-open .menu-toggle-bar:nth-child(2) {
  opacity: 0;
  width: 0;
}

.menu-open .menu-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  z-index: 1090;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sidebar-drawer-header {
  display: none;
}

.sidebar-close {
  display: none;
}


.header-logos {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

.logo-link {
  flex-shrink: 0;
  display: block;
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: opacity var(--transition);
}

.logo-link:hover {
  opacity: 0.9;
}

.logo-link img {
  width: auto;
  height: 72px;
  max-width: 200px;
  object-fit: contain;
}

.logo-link--flift {
  background: #FFFFFF;
  padding: 6px 10px;
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.logo-link--flift img {
  height: 68px;
  max-width: 210px;
}

.logo-link--cllg {
  background: #FFFFFF;
  padding: 4px;
  border-radius: var(--radius-md);
}

.logo-link--cllg img {
  height: 64px;
  max-width: 220px;
}

.header-titles {
  flex: 1;
  min-width: 200px;
  text-align: center;
}

.site-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(var(--font-size-xl), 4vw, var(--font-size-3xl));
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: #FFFFFF;
  letter-spacing: 0.01em;
}

.site-subtitle {
  margin: var(--space-sm) 0 0;
  font-family: var(--font-sans);
  font-size: clamp(var(--font-size-sm), 2vw, var(--font-size-base));
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--color-accent-gold);
  font-style: italic;
}

/* --------------------------------------------------------------------------
   Main Layout Grid
   -------------------------------------------------------------------------- */

.site-layout {
  flex: 1;
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: var(--space-xl);
  max-width: var(--max-width);
  width: 100%;
  margin: var(--space-xl) auto;
  padding: 0 var(--space-md);
}

/* --------------------------------------------------------------------------
   Sidebar Navigation
   -------------------------------------------------------------------------- */

.sidebar {
  position: sticky;
  top: var(--space-md);
  align-self: start;
}

.issue-nav {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.issue-nav ul {
  list-style: none;
  margin: 0;
  padding: var(--space-sm) 0;
}

.issue-nav li {
  margin: 0;
}

.issue-nav a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-header-alt);
  border-left: 3px solid transparent;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

.issue-nav a:hover {
  background-color: var(--color-border-subtle);
  color: var(--color-accent-burgundy);
  border-left-color: var(--color-accent-gold);
}

.issue-nav li.active > a {
  background-color: var(--color-header);
  color: #FFFFFF;
  border-left-color: var(--color-accent-gold);
}

.issue-nav li.active > a:hover {
  background-color: var(--color-header-alt);
  color: #FFFFFF;
}

.issue-nav .archive-root > details > summary,
.issue-nav .archive-issue > summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-header-alt);
  border-left: 3px solid transparent;
}

.issue-nav .archive-root > details > summary::-webkit-details-marker,
.issue-nav .archive-issue > summary::-webkit-details-marker {
  display: none;
}

.issue-nav .archive-root > details > summary::before,
.issue-nav .archive-issue > summary::before {
  content: "▸";
  display: inline-block;
  width: 1em;
  margin-right: 0.25em;
  color: var(--color-accent-gold);
}

.issue-nav details[open] > summary::before {
  content: "▾";
}

.issue-nav .archive-root.active-section > details > summary {
  border-left-color: var(--color-accent-gold);
  background-color: var(--color-border-subtle);
}

.issue-nav .archive-issue > summary {
  font-weight: 600;
  padding-left: calc(var(--space-md) + 0.5rem);
}

.issue-nav .archive-issue > summary a {
  display: inline;
  padding: 0;
  border: none;
  font-weight: 600;
  color: inherit;
}

.issue-nav .archive-issue > summary a:hover {
  background: transparent;
  color: var(--color-accent-burgundy);
}

.issue-nav li.active .archive-issue > summary,
.issue-nav li.active .archive-issue > summary a {
  color: var(--color-accent-burgundy);
}

.issue-nav .archive-list,
.issue-nav .archive-subnav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.issue-nav .archive-subnav a {
  padding-left: calc(var(--space-md) + 1.5rem);
  font-weight: 500;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.page-heading {
  margin: 0 0 var(--space-lg);
  font-family: var(--font-serif);
  font-size: var(--font-size-2xl);
  color: var(--color-header);
}

.page-lead,
.page-note {
  margin: 0 0 var(--space-lg);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

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

.contact-page {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-xl);
  text-align: left;
}

.contact-page .footer-col p,
.footer-col p {
  margin: var(--space-xs) 0;
}

.sidebar-meta {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

.sidebar-meta .updated {
  font-weight: 600;
  color: var(--color-header-alt);
  margin: 0 0 var(--space-sm);
}

.sidebar-meta .pdf-note {
  margin: 0;
}

.sidebar-meta .pdf-note a {
  font-weight: 600;
  color: var(--color-link);
}

.sidebar-meta .pdf-note a:hover {
  color: var(--color-accent-burgundy);
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */

.main-content {
  min-width: 0;
}

.content-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.content-links li {
  margin: 0;
}

.content-links a {
  display: block;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-header-alt);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

.content-links a:hover {
  border-color: var(--color-accent-gold);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: var(--color-accent-burgundy);
}

.featured-image {
  margin-top: var(--space-2xl);
  text-align: center;
}

.featured-image a {
  display: inline-block;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: box-shadow var(--transition), transform var(--transition);
}

.featured-image a:hover {
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.15);
  transform: translateY(-2px);
}

.featured-image img {
  margin: 0 auto;
}

.featured-caption {
  margin-top: var(--space-lg);
  text-align: center;
}

.featured-caption a {
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-header-alt);
  line-height: var(--line-height-relaxed);
}

.featured-caption a:hover {
  color: var(--color-accent-burgundy);
}

/* Issue page content (for heft*.htm reuse) */
.issue-content {
  text-align: center;
}

.issue-title {
  margin: 0 0 var(--space-lg);
  font-family: var(--font-serif);
  font-size: var(--font-size-2xl);
  color: var(--color-header);
}

.issue-title a {
  color: var(--color-header);
}

.issue-title a:hover {
  color: var(--color-accent-burgundy);
}

.issue-details {
  margin-top: var(--space-lg);
  text-align: center;
}

.issue-details--left {
  text-align: left;
  max-width: 100%;
}

.issue-details p {
  margin: var(--space-sm) 0;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  margin-top: auto;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.footer-contact {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  text-align: left;
  font-size: var(--font-size-sm);
}

.footer-contact-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-xl);
}

.footer-contact p {
  margin: var(--space-xs) 0;
}

.footer-contact a {
  font-weight: 600;
  color: var(--color-header-alt);
}

.footer-contact a:hover {
  color: var(--color-accent-burgundy);
}

.footer-bar {
  background: var(--color-header);
  color: var(--color-text-light);
  padding: var(--space-md);
  text-align: center;
  font-size: var(--font-size-sm);
}

.footer-bar p {
  margin: 0;
}

.footer-bar .webmaster {
  font-weight: 600;
  color: #E2E8F0;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow 0.2s ease;
  }

  .menu-toggle {
    display: flex;
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    flex-shrink: 0;
  }

  .site-header .site-container {
    flex-direction: column;
    text-align: center;
    padding-top: calc(var(--space-lg) + 44px);
  }

  .site-header.header-compact {
    padding: var(--space-sm) var(--space-md);
    box-shadow: var(--shadow-lg);
  }

  .site-header.header-compact .site-container {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    padding-top: 0;
    gap: var(--space-md);
    text-align: left;
  }

  .site-header.header-compact .menu-toggle {
    position: static;
  }

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

  .header-logos {
    flex-wrap: wrap;
    justify-content: center;
  }

  .logo-link img {
    height: 56px;
    max-width: 160px;
  }

  .logo-link--flift img {
    height: 52px;
    max-width: 170px;
  }

  .logo-link--cllg img {
    height: 48px;
    max-width: 180px;
  }

  .issue-nav .archive-root > details > summary,
  .issue-nav .archive-issue > summary {
    padding: var(--space-md) var(--space-lg);
  }

  .issue-nav .archive-subnav a {
    padding-left: calc(var(--space-lg) + 1.25rem);
  }

  .site-header.header-compact .header-titles {
    flex: 1;
    min-width: 0;
    text-align: left;
  }

  .site-header.header-compact .site-title {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-tight);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .header-titles {
    text-align: center;
  }

  .site-layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
  }

  .sidebar-overlay {
    display: block;
    pointer-events: none;
  }

  .menu-open .sidebar-overlay {
    opacity: 1;
    pointer-events: auto;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: min(300px, 85vw);
    height: 100vh;
    height: 100dvh;
    margin: 0;
    padding: 0;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    z-index: 1100;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .menu-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-header);
    color: #FFFFFF;
    position: sticky;
    top: 0;
    z-index: 1;
  }

  .sidebar-drawer-title {
    font-size: var(--font-size-sm);
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-accent-gold);
  }

  .sidebar-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.12);
    color: #FFFFFF;
    font-size: 1.75rem;
    line-height: 1;
    cursor: pointer;
    transition: background-color var(--transition);
  }

  .sidebar-close:hover {
    background: rgba(255, 255, 255, 0.22);
  }

  .issue-nav {
    border: none;
    border-radius: 0;
    box-shadow: none;
  }

  .issue-nav ul {
    display: block;
    padding: var(--space-sm) 0;
  }

  .issue-nav a {
    border-left: 3px solid transparent;
    border-bottom: none;
    border-radius: 0;
    text-align: left;
    padding: var(--space-md) var(--space-lg);
  }

  .issue-nav a:hover {
    border-left-color: var(--color-accent-gold);
    border-bottom: none;
  }

  .issue-nav li.active a {
    border-left-color: var(--color-accent-gold);
    border-bottom: none;
  }

  .sidebar-meta {
    padding: var(--space-md) var(--space-lg) var(--space-xl);
  }

  .footer-contact {
    text-align: left;
  }

  body.menu-open {
    overflow: hidden;
  }
}

@media (max-width: 480px) {
  .content-links a {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-xs);
  }
}