/* Deutsch Lernraum — shared final UI layer for direct PHP and React-hosted legacy pages */
:root {
  --border: var(--line, #e4eaf0);
  --panel: var(--surface, #fff);
  --surface-2: var(--soft, #f4f7fa);
  --premium-radius: 18px;
  --premium-shadow: 0 14px 38px rgba(23, 32, 51, .075);
  --premium-focus: 0 0 0 4px rgba(8, 127, 115, .12);
}
*, *::before, *::after { box-sizing: border-box; }
button, input, select, textarea { font: inherit; }
button:disabled, input:disabled, select:disabled, textarea:disabled { cursor: not-allowed !important; opacity: .58; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 3px solid rgba(8,127,115,.28); outline-offset: 3px; }
.panel, .card, .card-module, .notice, .notification-card, .announcement-card, .two-column > div, .table-wrap { border-radius: var(--premium-radius); }
.panel, .card, .card-module, .notification-card, .announcement-card { border: 1px solid var(--border); box-shadow: var(--premium-shadow); background: var(--panel); }
.panel, .card, .card-module { padding: clamp(16px, 2vw, 24px); }
input:not([type="checkbox"]):not([type="radio"]), select, textarea { min-height: 44px; border: 1px solid var(--border); border-radius: 13px; background: var(--panel); color: var(--ink); transition: border-color .2s ease, box-shadow .2s ease, background .2s ease; }
input:not([type="checkbox"]):not([type="radio"]):focus, select:focus, textarea:focus { border-color: #087f73; box-shadow: var(--premium-focus); outline: 0; }
textarea { min-height: 96px; resize: vertical; }
.button, .button-primary, .button-secondary, .button-danger, .button-quiet, button[type="submit"] { min-height: 42px; border-radius: 13px; transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease; }
.button-primary, .primary-button { box-shadow: 0 8px 20px rgba(8,127,115,.16); }
.button-primary:hover, .primary-button:hover { transform: translateY(-1px); box-shadow: 0 12px 26px rgba(8,127,115,.23); }
.button-secondary, .button-quiet { background: var(--panel); border-color: var(--border); color: var(--ink); }
.table-wrap { overflow-x: auto; overscroll-behavior-x: contain; border: 1px solid var(--border); background: var(--panel); }
.table-wrap table { width: 100%; border-collapse: collapse; }
.table-wrap th, .table-wrap td { padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table-wrap th { color: var(--muted); font-size: 11px; font-weight: 750; text-align: start; background: color-mix(in srgb, var(--surface-2) 76%, transparent); }
.table-wrap tr:last-child td { border-bottom: 0; }
.notification-card, .announcement-card { display: flex; align-items: flex-start; gap: 14px; margin-top: 12px; padding: 16px; }
.notification-card .notification-body, .announcement-card > p { min-width: 0; overflow-wrap: anywhere; }
.notification-card form { margin-inline-start: auto; flex: 0 0 auto; }
.notification-card.is-read { opacity: .78; }
.announcement-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.announcement-card h3 { margin: 0 0 7px; }
.announcement-card p { line-height: 1.8; white-space: pre-wrap; }
.two-column { display: grid; grid-template-columns: minmax(180px, .72fr) minmax(0, 1.28fr); gap: 18px; }
.two-column > div { min-width: 0; }
.two-column table { min-width: 0; }
.two-column a[aria-current="page"], .two-column a[style*="font-weight:700"] { display: block; padding: 8px 10px; border-radius: 10px; background: color-mix(in srgb, #087f73 10%, transparent); color: #087f73; }
.chat-screen { border: 1px solid var(--border); box-shadow: var(--premium-shadow); }
.chat-screen-body { background: var(--surface-2, #f4f7fa); }
.chat-composer-wrap, .chat-screen-header { background: var(--panel, #fff); }
.chat-composer textarea { background: var(--surface-2, #f4f7fa); color: var(--ink); }
.chat-composer button:disabled { filter: saturate(.5); }
.form-grid { gap: 14px; }
.form-grid .span-two { grid-column: 1 / -1; }
@media (max-width: 760px) {
  .two-column { grid-template-columns: 1fr; }
  .two-column > div { width: 100%; }
  .two-column .table-wrap { border: 0; background: transparent; }
  .two-column .table-wrap table { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; }
  .notification-card, .announcement-card { flex-wrap: wrap; }
  .notification-card form { width: 100%; margin-inline-start: 0; }
  .notification-card form button { width: 100%; }
  .announcement-meta { align-items: flex-start; flex-direction: column; gap: 6px; }
  .form-grid { grid-template-columns: 1fr !important; }
  .form-grid .span-two { grid-column: auto; }
  .chat-screen-status, .chat-group-switch { display: initial; }
  .chat-screen-status { font-size: 9px; padding: 5px 7px; }
  .chat-group-switch select { max-width: 125px; }
}
@media (max-width: 420px) {
  .panel, .card, .card-module { padding: 14px; border-radius: 15px; }
  .panel-head { align-items: flex-start; flex-direction: column; }
  .table-wrap table { min-width: 560px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}
:root[data-theme="dark"] {
  --premium-shadow: 0 16px 42px rgba(0,0,0,.26);
}
:root[data-theme="dark"] .panel, :root[data-theme="dark"] .card, :root[data-theme="dark"] .card-module, :root[data-theme="dark"] .notification-card, :root[data-theme="dark"] .announcement-card, :root[data-theme="dark"] .table-wrap, :root[data-theme="dark"] .chat-screen { background: #10161e !important; border-color: #2a3542 !important; color: #f5f7fa; }
:root[data-theme="dark"] input:not([type="checkbox"]):not([type="radio"]), :root[data-theme="dark"] select, :root[data-theme="dark"] textarea { background: #0d1117 !important; color: #f5f7fa !important; border-color: #3a4655 !important; }
:root[data-theme="dark"] .table-wrap th { background: #171e27; color: #aab5c2; }
:root[data-theme="dark"] .table-wrap th, :root[data-theme="dark"] .table-wrap td { border-color: #2a3542; }
:root[data-theme="dark"] .chat-screen-body { background: #0b1118; }
:root[data-theme="dark"] .chat-composer-wrap, :root[data-theme="dark"] .chat-screen-header { background: #10161e; border-color: #2a3542; }