:root {
  color-scheme: dark;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --ink: #f2fbff;
  --muted: #b7cbd4;
  --line: rgba(165, 222, 236, 0.18);
  --surface: rgba(3, 25, 39, 0.83);
  --surface-soft: rgba(4, 33, 48, 0.76);
  --cyan: #54e6ef;
  --lime: #a4ff4c;
  --danger: #ff9a9a;
}

* { box-sizing: border-box; }

body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: #052d3a url("assets/hintergrund.png") center / cover fixed no-repeat;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  background: linear-gradient(180deg, rgba(1, 21, 33, 0.25), rgba(1, 20, 32, 0.65));
  content: "";
}

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

.site-header {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 8px max(24px, calc((100vw - 1180px) / 2));
  background: rgba(2, 20, 30, 0.74);
  border-bottom: 1px solid rgba(123, 222, 231, 0.2);
  backdrop-filter: blur(12px);
}

.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; }
.brand-logo { width: 62px; height: 48px; object-fit: contain; }
.brand-name { font-size: 1.3rem; font-weight: 750; letter-spacing: -0.04em; }
.brand-name span { color: var(--cyan); }
.header-note { color: var(--muted); font-size: 0.88rem; }

.page-shell { width: min(1120px, calc(100% - 40px)); margin: 48px auto 64px; }
.panel, .intro-panel, .board-card {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 16px 48px rgba(0, 10, 20, 0.22);
  backdrop-filter: blur(16px);
}

.intro-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: clamp(24px, 5vw, 48px);
  border-radius: 22px;
}

.eyebrow { margin: 0 0 10px; color: var(--lime); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.16em; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 650px; margin-bottom: 12px; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.08; letter-spacing: -0.045em; }
.intro-copy { max-width: 640px; margin-bottom: 0; color: var(--muted); font-size: 1.04rem; line-height: 1.6; }

.button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}
.button:hover { transform: translateY(-1px); }
.button:focus-visible, .icon-button:focus-visible, summary:focus-visible, a:focus-visible, select:focus-visible, input:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
}
.button-primary { flex: 0 0 auto; color: #04242b; background: linear-gradient(120deg, var(--cyan), var(--lime)); }
.button-primary:hover { background: linear-gradient(120deg, #8ff5fa, #c0ff7e); }
.button-secondary { border-color: var(--line); background: rgba(255,255,255,0.055); }
.button-secondary:hover { border-color: rgba(84, 230, 239, 0.65); background: rgba(84, 230, 239, 0.1); }
.button-danger { color: #ffd2d2; border-color: rgba(255, 154, 154, 0.28); }
.button-danger:hover { background: rgba(255, 100, 100, 0.12); }
.button-small { min-height: 34px; padding: 6px 10px; font-size: 0.82rem; }
.icon-button { width: 36px; height: 36px; border: 0; border-radius: 8px; background: transparent; cursor: pointer; font-size: 1.6rem; line-height: 1; }
.icon-button:hover { background: rgba(255,255,255,0.1); }

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 28px 0 16px;
  padding: 18px 22px;
  border-radius: 15px;
}
.toolbar h2 { margin: 0 0 4px; font-size: 1.05rem; }
.muted { margin: 0; color: var(--muted); font-size: 0.84rem; }
.toolbar-actions { display: flex; flex-wrap: wrap; gap: 9px; }

.notice { min-height: 0; margin: 0; color: var(--lime); font-size: 0.9rem; }
.notice:not(:empty) { margin: 10px 4px 14px; }
.notice.error { color: var(--danger); }
.boards { display: grid; gap: 15px; }
.board-card { overflow: hidden; border-radius: 16px; }
.board-summary {
  min-height: 75px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  list-style: none;
  cursor: pointer;
}
.board-summary::-webkit-details-marker { display: none; }
.board-summary::before { color: var(--cyan); content: "▸"; font-size: 1.15rem; transition: transform 140ms ease; }
.board-card[open] > .board-summary::before { transform: rotate(90deg); }
.board-title { flex: 1; min-width: 0; margin: 0; overflow-wrap: anywhere; font-size: 1.15rem; }
.board-count { color: var(--muted); font-size: 0.82rem; white-space: nowrap; }
.board-actions { display: flex; flex-wrap: wrap; gap: 7px; }
.board-content { padding: 0 20px 20px; }
.board-toolbar { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 0 16px 27px; }
.tree, .tree ul { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.tree ul { margin: 8px 0 0 16px; padding-left: 14px; border-left: 1px solid rgba(84, 230, 239, 0.32); }
.tree-item { min-width: 0; }
.category-details > summary { list-style: none; cursor: pointer; }
.category-details > summary::-webkit-details-marker { display: none; }
.category-summary::before { color: var(--cyan); content: "▸"; font-size: 1.05rem; transition: transform 140ms ease; }
.category-details[open] > .category-summary::before { transform: rotate(90deg); }
.entry-row {
  min-height: 50px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px 7px 13px;
  border: 1px solid rgba(165, 222, 236, 0.12);
  border-radius: 10px;
  background: var(--surface-soft);
}
.entry-icon { width: 22px; color: var(--lime); text-align: center; }
.entry-name { flex: 1; min-width: 0; overflow-wrap: anywhere; font-weight: 650; }
.entry-name a { color: #dcfaff; text-decoration-color: rgba(84,230,239,0.45); text-underline-offset: 3px; }
.entry-name a:hover { color: var(--cyan); }
.entry-actions { display: flex; flex: 0 0 auto; flex-wrap: wrap; justify-content: flex-end; gap: 5px; }
.category-name { color: #f5ffe7; }
.empty-category { padding: 10px 12px 4px 44px; color: var(--muted); font-size: 0.83rem; }
.empty-state { padding: 22px; border: 1px dashed var(--line); border-radius: 12px; color: var(--muted); text-align: center; }
.empty-state strong { display: block; margin-bottom: 6px; color: var(--ink); }
.site-footer { padding: 0 20px 24px; color: rgba(231, 249, 255, 0.72); font-size: 0.82rem; text-align: center; }

dialog {
  width: min(500px, calc(100% - 28px));
  max-height: min(88vh, 760px);
  padding: 0;
  overflow: auto;
  color: var(--ink);
  border: 1px solid rgba(84, 230, 239, 0.32);
  border-radius: 18px;
  background: #082532;
  box-shadow: 0 24px 90px rgba(0,0,0,0.58);
}
dialog::backdrop { background: rgba(0, 11, 18, 0.74); backdrop-filter: blur(5px); }
dialog form { padding: 24px; }
.dialog-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 15px; margin-bottom: 24px; }
.dialog-heading h2 { margin: 0; font-size: 1.35rem; }
.field { display: grid; gap: 8px; margin: 0 0 18px; }
.field label { color: #e4f6fb; font-size: 0.9rem; font-weight: 700; }
.field input, .field select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid rgba(165, 222, 236, 0.28);
  border-radius: 9px;
  background: #061c28;
}
.field input::placeholder { color: #829ba6; }
.field select option { color: var(--ink); background: #061c28; }
.field-hint { margin: -2px 0 0; color: var(--muted); font-size: 0.78rem; }
.form-error { min-height: 1.2em; margin: 0 0 12px; color: var(--danger); font-size: 0.88rem; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 9px; padding-top: 8px; }

@media (max-width: 700px) {
  .site-header { min-height: 64px; gap: 8px; padding: 8px 12px; }
  .brand { gap: 8px; }
  .brand-logo { width: 48px; height: 40px; }
  .brand-name { font-size: 1rem; }
  .header-note { max-width: 110px; font-size: 0.72rem; text-align: right; }
  .page-shell { width: min(calc(100% - 24px), 560px); margin: 22px auto 42px; }
  .intro-panel { align-items: flex-start; flex-direction: column; gap: 20px; border-radius: 16px; }
  .intro-panel > .button { width: 100%; }
  .toolbar { align-items: flex-start; flex-direction: column; padding: 16px; }
  .toolbar-actions { width: 100%; }
  .toolbar-actions .button { min-width: 0; flex: 1; padding-inline: 8px; font-size: 0.78rem; }
  .board-summary { align-items: flex-start; flex-wrap: wrap; padding: 15px; }
  .board-title { flex-basis: calc(100% - 70px); }
  .board-count { margin-left: 35px; }
  .board-actions { margin-left: auto; }
  .board-content { padding: 0 12px 14px; }
  .board-toolbar { padding-left: 0; }
  .tree ul { margin-left: 9px; padding-left: 8px; }
  .entry-row { align-items: flex-start; flex-wrap: wrap; padding: 9px; }
  .entry-name { flex-basis: calc(100% - 38px); padding-top: 3px; }
  .entry-actions { width: 100%; padding-left: 30px; justify-content: flex-start; }
  .button-small { min-height: 32px; }
}

@media (max-width: 380px) {
  .header-note { display: none; }
  .brand-logo { width: 44px; height: 36px; }
}

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