/*
 * RT UI System – Core stylesheet
 * Release: 0.1.5
 *
 * Verbindliche Reihenfolge:
 * 1. Design Tokens / Theme
 * 2. Base
 * 3. Layouts
 * 4. Components
 * 5. Utilities
 * 6. Responsive rules
 *
 * Fachmodule dürfen diese Basis verwenden und nur wirklich modulspezifische
 * Ergänzungen hinzufügen. Globale Farben, Abstände, Radien und Komponenten
 * werden ausschließlich hier zentral gepflegt.
 */

/* 1. Design Tokens ------------------------------------------------------- */
:root {
  color-scheme: light;

  --rt-brand-blue: #006ab5;
  --rt-brand-teal: #01838b;
  --rt-brand-green: #008f32;
  --rt-brand-gold: #f0ae09;

  --color-bg-page: #f3f5f7;
  --color-bg-surface: #ffffff;
  --color-bg-surface-soft: #f8fafc;
  --color-bg-surface-strong: #eef1f4;
  --color-bg-sidebar: #181b20;
  --color-bg-overlay: rgba(15, 23, 42, .44);

  --color-text: #17202a;
  --color-text-soft: #667085;
  --color-text-subtle: #7d8796;
  --color-text-inverse: #f8fafc;

  --color-border: #dfe4ea;
  --color-border-strong: #c7ced7;

  --color-primary: var(--rt-brand-blue);
  --color-primary-hover: #005993;
  --color-primary-soft: #eef7fd;
  --color-focus: rgba(0, 106, 181, .18);

  --color-success: #067647;
  --color-success-bg: #ecfdf3;
  --color-warning: #b54708;
  --color-warning-bg: #fffaeb;
  --color-danger: #b42318;
  --color-danger-bg: #fef3f2;
  --color-info: #175cd3;
  --color-info-bg: #eff8ff;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .05);
  --shadow-md: 0 10px 30px rgba(16, 24, 40, .08);
  --shadow-lg: 0 24px 60px rgba(16, 24, 40, .12);

  --radius-xs: 6px;
  --radius-sm: 9px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 1.75rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  --content-max: 1480px;
  --sidebar-width: 260px;
  --control-height: 42px;
  --transition-fast: 140ms ease;
}

html[data-theme="dark"] {
  color-scheme: dark;

  --color-bg-page: #202124;
  --color-bg-surface: #333333;
  --color-bg-surface-soft: #2b2b2b;
  --color-bg-surface-strong: #3a3a3a;
  --color-bg-sidebar: #171717;
  --color-bg-overlay: rgba(0, 0, 0, .62);

  --color-text: #f4f4f5;
  --color-text-soft: #b7bcc5;
  --color-text-subtle: #9ea4ad;
  --color-text-inverse: #f8fafc;

  --color-border: #4a4a4a;
  --color-border-strong: #5a5a5a;

  --color-primary: #74b8e7;
  --color-primary-hover: #9bcaea;
  --color-primary-soft: #253b48;
  --color-focus: rgba(116, 184, 231, .24);

  --color-success: #65d6a6;
  --color-success-bg: #233e35;
  --color-warning: #f6c86c;
  --color-warning-bg: #493b20;
  --color-danger: #ff9b92;
  --color-danger-bg: #4a2928;
  --color-info: #8ab4ff;
  --color-info-bg: #26364f;

  --shadow-sm: none;
  --shadow-md: 0 12px 34px rgba(0, 0, 0, .18);
  --shadow-lg: 0 26px 64px rgba(0, 0, 0, .28);
}

/* 2. Base ---------------------------------------------------------------- */
* { box-sizing: border-box; }
html {
  min-height: 100%;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--color-bg-page);
  color: var(--color-text);
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  background: var(--color-bg-page);
  color: var(--color-text);
  line-height: 1.5;
}
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; }
button, input, select, textarea, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(1.55rem, 2vw, 2rem); line-height: 1.2; letter-spacing: -.02em; }
h2 { margin-bottom: var(--space-4); font-size: 1.15rem; line-height: 1.3; }
h3 { font-size: 1rem; line-height: 1.35; }
small { font-size: .82rem; }

/* 3. Layouts ------------------------------------------------------------- */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
  min-height: 100svh;
}
.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100svh;
  padding: var(--space-5) var(--space-4);
  background: var(--color-bg-sidebar);
  color: var(--color-text-inverse);
  overflow-y: auto;
}
.main-content {
  min-width: 0;
  padding: var(--space-7) var(--space-8) var(--space-12);
}
.main-content > * { max-width: var(--content-max); }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}
.topbar > div:first-of-type { min-width: 0; }
.topbar-actions { display: flex; align-items: center; gap: var(--space-2); margin-left: auto; }
.detail-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr); gap: var(--space-6); }
.admin-grid { grid-template-columns: minmax(0, 2fr) minmax(320px, .9fr); }
.stat-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-4); margin-bottom: var(--space-6); }
.form-grid { display: grid; gap: var(--space-4); }
.form-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-stack { display: flex; flex-direction: column; gap: var(--space-4); }
.form-actions { display: flex; justify-content: flex-end; align-items: center; gap: var(--space-3); }
.inline-form { display: flex; align-items: end; gap: var(--space-3); margin-top: var(--space-5); padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
.inline-form label { min-width: 220px; }

/* 4. Components ---------------------------------------------------------- */
.app-brand { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-3); color: inherit; text-decoration: none; }
.app-brand:hover { text-decoration: none; }
.app-brand-logo { display: block; width: 100%; max-width: 208px; height: auto; }
.app-brand-product { display: flex; flex-direction: column; color: var(--color-text-inverse); font-weight: 750; line-height: 1.2; }
.app-brand-product small { margin-top: 4px; color: #aab2c0; font-size: .72rem; font-weight: 600; }
.nav { display: flex; flex-direction: column; gap: 5px; margin-top: var(--space-7); }
.nav a { padding: 10px 12px; border-radius: var(--radius-sm); color: #d5dae3; font-weight: 650; }
.nav a:hover, .nav a:focus-visible { background: rgba(255, 255, 255, .08); color: #fff; text-decoration: none; }
.nav-section { padding: 19px 12px 5px; color: #8d98aa; font-size: .68rem; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.sidebar-footer { margin-top: auto; padding-top: var(--space-4); border-top: 1px solid rgba(255, 255, 255, .12); }
.user-chip { display: flex; flex-direction: column; margin-bottom: var(--space-3); }
.user-chip small { color: #aab2c0; }

.card { background: var(--color-bg-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.section-card { margin-bottom: var(--space-6); padding: var(--space-6); }
.section-head { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-5); margin-bottom: var(--space-5); }
.section-head h2 { margin-bottom: 0; }
.stat { padding: var(--space-5); }
.stat span { display: block; color: var(--color-text-soft); font-size: .86rem; font-weight: 650; }
.stat strong { display: block; margin-top: 7px; font-size: 2rem; line-height: 1; }

.button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: var(--control-height);
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 750;
  line-height: 1.2;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.button:hover { text-decoration: none; }
.button:active { transform: translateY(1px); }
.button:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.button.primary { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.button.primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
html[data-theme="dark"] .button.primary { color: #10212c; }
.button.secondary { background: var(--color-bg-surface-soft); border-color: var(--color-border); color: var(--color-text); }
.button.secondary:hover { background: var(--color-bg-surface-strong); }
.button.ghost { background: transparent; border-color: var(--color-border); color: var(--color-text); }
.button.ghost:hover { background: var(--color-bg-surface-soft); }
.button.danger { background: var(--color-danger); border-color: var(--color-danger); color: #fff; }
.sidebar .button.ghost { border-color: rgba(255, 255, 255, .2); color: #fff; }
.sidebar .button.ghost:hover { background: rgba(255, 255, 255, .08); }
.icon-button { width: var(--control-height); height: var(--control-height); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-bg-surface); color: var(--color-text); cursor: pointer; }

label { display: flex; flex-direction: column; gap: 6px; font-size: .9rem; font-weight: 700; }
input, select, textarea {
  width: 100%;
  min-height: var(--control-height);
  padding: 10px 11px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  background: var(--color-bg-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}
textarea { min-height: 120px; resize: vertical; }
input::placeholder, textarea::placeholder { color: var(--color-text-subtle); opacity: 1; }
input:focus, select:focus, textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-focus); }
.checkbox { flex-direction: row; align-items: center; font-weight: 600; }
.checkbox input { width: auto; min-height: 0; }

.theme-control { display: flex; flex-direction: row; align-items: center; gap: var(--space-2); font-size: .78rem; color: var(--color-text-soft); }
.theme-control select { width: auto; min-width: 112px; min-height: 38px; padding: 7px 30px 7px 10px; font-size: .82rem; font-weight: 650; }
.sidebar .theme-control { flex-direction: column; align-items: stretch; color: #aab2c0; margin-bottom: var(--space-3); }
.sidebar .theme-control select { width: 100%; border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.06); color: #fff; }
.sidebar .theme-control option { color: #111; background: #fff; }

.alert { margin-bottom: var(--space-5); padding: 12px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-bg-surface-soft); }
.alert.success { background: var(--color-success-bg); border-color: color-mix(in srgb, var(--color-success) 35%, var(--color-border)); color: var(--color-success); }
.alert.error { background: var(--color-danger-bg); border-color: color-mix(in srgb, var(--color-danger) 35%, var(--color-border)); color: var(--color-danger); }
.alert.warning { background: var(--color-warning-bg); border-color: color-mix(in srgb, var(--color-warning) 35%, var(--color-border)); color: var(--color-warning); }
.alert.info { background: var(--color-info-bg); border-color: color-mix(in srgb, var(--color-info) 35%, var(--color-border)); color: var(--color-info); }
.alert ul { margin: .4rem 0 0; padding-left: 1.25rem; }
.callout { padding: 12px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-bg-surface-soft); color: var(--color-text-soft); }

.table-wrap { overflow: auto; border-radius: var(--radius-md); }
.table-wrap table { width: 100%; min-width: 720px; border-collapse: collapse; }
th, td { padding: 12px 10px; border-bottom: 1px solid var(--color-border); text-align: left; vertical-align: top; }
th { color: var(--color-text-soft); font-size: .75rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: color-mix(in srgb, var(--color-bg-surface-soft) 72%, transparent); }

.badge { display: inline-flex; align-items: center; padding: 4px 8px; border: 1px solid var(--color-border); border-radius: var(--radius-pill); background: var(--color-bg-surface-soft); font-size: .72rem; font-weight: 800; }
.status-open { color: var(--color-info); background: var(--color-info-bg); }
.status-in_progress { color: #6941c6; background: #f4f3ff; }
.status-waiting { color: var(--color-warning); background: var(--color-warning-bg); }
.status-resolved { color: var(--color-success); background: var(--color-success-bg); }
.status-closed { color: var(--color-text-soft); }
html[data-theme="dark"] .status-in_progress { color: #c5a7ff; background: #3b3152; }

.ticket-meta { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-3); padding: var(--space-4) 0; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.ticket-meta div { display: flex; flex-direction: column; }
.ticket-meta span { color: var(--color-text-soft); font-size: .75rem; font-weight: 700; }
.ticket-description { padding: var(--space-5) 0; }
.message-list, .file-list, .backup-list { display: flex; flex-direction: column; gap: var(--space-3); }
.message { padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-bg-surface-soft); }
.message.internal { border-style: dashed; background: var(--color-warning-bg); }
.message header { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-2); }
.message header span { color: var(--color-text-soft); font-size: .78rem; }
.file-list a, .backup-list div { padding: 10px 11px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-bg-surface-soft); overflow-wrap: anywhere; }
.file-list a { display: flex; justify-content: space-between; gap: var(--space-3); }
.file-list small { color: var(--color-text-soft); white-space: nowrap; }
.update-summary dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); }
.update-summary dl div { padding: 10px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-bg-surface-soft); }
.update-summary dt { color: var(--color-text-soft); font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.update-summary dd { margin: 4px 0 0; font-weight: 800; }

.installer-body { background: var(--color-bg-page); }
.installer-shell { display: grid; align-items: start; place-items: center; min-height: 100vh; min-height: 100svh; padding: var(--space-7); }
.installer-card { width: min(900px, 100%); padding: var(--space-7); }
.installer-brand { display: block; width: min(100%, 360px); height: auto; margin-bottom: var(--space-6); }
.check-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-2); margin: var(--space-3) 0 var(--space-7); }
.check-item { display: grid; grid-template-columns: 12px 1fr auto; align-items: center; gap: var(--space-2); padding: 10px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-bg-surface-soft); }
.status-dot { width: 9px; height: 9px; border-radius: 50%; }
.status-dot.ok { background: var(--color-success); }
.status-dot.bad { background: var(--color-danger); }

/* 5. Utilities ----------------------------------------------------------- */
.small { font-size: .85rem; }
.muted { color: var(--color-text-soft); }
.hint { color: var(--color-text-soft); font-size: .82rem; font-weight: 400; }
.eyebrow { margin-bottom: .35rem; color: var(--color-text-soft); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.narrow { max-width: 860px; }
.full { width: 100%; }
.empty { padding: 30px 10px; color: var(--color-text-soft); text-align: center; }
.mobile-only { display: none; }
.sr-only { 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; }

/* 6. Responsive ---------------------------------------------------------- */
@media (max-width: 980px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-grid, .admin-grid { grid-template-columns: 1fr; }
  .ticket-meta { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .app-shell { display: block; }
  .sidebar { position: fixed; z-index: 50; left: 0; top: 0; width: var(--sidebar-width); transform: translateX(-105%); transition: transform .2s ease; box-shadow: var(--shadow-lg); }
  .sidebar.open { transform: translateX(0); }
  .main-content { padding: var(--space-5) var(--space-4) var(--space-10); }
  .mobile-only { display: inline-grid; place-items: center; }
  .topbar { align-items: flex-start; }
  .topbar-actions .theme-control span:not(.sr-only) { display: none; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .form-grid.two, .check-grid { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; }
  .form-actions { flex-wrap: wrap; }
  .inline-form { align-items: stretch; flex-direction: column; }
  .inline-form label { min-width: 0; }
  .ticket-meta { grid-template-columns: 1fr 1fr; }
  .update-summary dl { grid-template-columns: 1fr; }
}

@media (max-width: 460px) {
  .stat-grid, .ticket-meta { grid-template-columns: 1fr; }
  .installer-shell { padding: 14px; }
  .installer-card { padding: var(--space-5); }
  .main-content { padding-inline: 12px; }
  .section-card { padding: var(--space-4); }
  .topbar-actions .theme-control select { min-width: 98px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* Theme-sensitive brand assets */
.theme-logo-light-surface { display: block; }
.theme-logo-dark-surface { display: none; }
html[data-theme="dark"] .theme-logo-light-surface { display: none; }
html[data-theme="dark"] .theme-logo-dark-surface { display: block; }
.installer-toolbar { display:flex; justify-content:flex-end; margin-bottom:var(--space-4); }