/* KI-Kompetenz-App — Design-Tokens + Base-Styles */

:root {
  /* Farben */
  --ki-color-primary:       #234B73;
  --ki-color-primary-light: #3B6FA3;
  --ki-color-primary-dark:  #1A3650;
  --ki-color-accent:        #64AD59;
  --ki-color-accent-light:  #8FBF7E;
  --ki-color-accent-dark:   #4A8041;
  --ki-color-success:       #64AD59;
  --ki-color-warning:       #F39C12;
  --ki-color-error:         #C0392B;
  --ki-color-text:          #2C3E50;
  --ki-color-text-light:    #5D6D7E;
  --ki-color-bg:            #FFFFFF;
  --ki-color-bg-light:      #F4F6F8;
  --ki-color-border:        #CED4DA;

  /* Spacing (8px-Grid) */
  --ki-space-xs:  0.25rem;   /* 4px  */
  --ki-space-sm:  0.5rem;    /* 8px  */
  --ki-space-md:  1rem;      /* 16px */
  --ki-space-lg:  1.5rem;    /* 24px */
  --ki-space-xl:  2rem;      /* 32px */
  --ki-space-2xl: 3rem;      /* 48px */

  /* Typographie */
  --ki-font:         system-ui, -apple-system, 'Segoe UI', sans-serif;
  --ki-font-size-xs: 0.75rem;
  --ki-font-size-sm: 0.875rem;
  --ki-font-size-md: 1rem;
  --ki-font-size-lg: 1.125rem;
  --ki-font-size-xl: 1.5rem;
  --ki-font-size-2xl:2rem;
  --ki-font-bold:    700;
  --ki-font-semi:    600;
  --ki-line-normal:  1.5;
  --ki-line-tight:   1.25;

  /* Radien */
  --ki-radius-sm: 0.25rem;
  --ki-radius-md: 0.5rem;
  --ki-radius-lg: 1rem;

  /* Schatten */
  --ki-shadow-sm: 0 1px 3px rgba(0,0,0,.12);
  --ki-shadow-md: 0 4px 8px rgba(0,0,0,.10);
  --ki-shadow-lg: 0 10px 20px rgba(0,0,0,.10);

  /* Übergänge */
  --ki-transition-fast: 150ms ease-out;
  --ki-transition-base: 250ms ease-out;
  --ki-transition-slow: 400ms ease-out;
}

/* ── Base Reset ─────────────────────────────── */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--ki-font);
  font-size: var(--ki-font-size-md);
  line-height: var(--ki-line-normal);
  color: var(--ki-color-text);
  background: var(--ki-color-bg);
  min-height: 100dvh;
}

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

a {
  color: var(--ki-color-primary);
  text-decoration: underline;
}

a:hover {
  color: var(--ki-color-primary-light);
}

button {
  cursor: pointer;
  font: inherit;
  border: none;
  background: none;
}

/* ── App-Layout ─────────────────────────────── */

.ki-app {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

.ki-header {
  background: var(--ki-color-primary);
  color: #fff;
  padding: var(--ki-space-md) var(--ki-space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--ki-shadow-sm);
}

.ki-header__logo {
  display: flex;
  align-items: center;
  gap: var(--ki-space-sm);
  text-decoration: none;
}

.ki-header__logo img {
  height: 2rem;
  width: auto;
  display: block;
}

.ki-header__brand {
  font-size: var(--ki-font-size-md);
  color: #fff;
  letter-spacing: 0.01em;
}

.ki-header__brand strong {
  color: var(--ki-color-accent);
  font-weight: 700;
}

.ki-nav {
  display: flex;
  gap: var(--ki-space-xs);
  background: var(--ki-color-primary-dark);
  padding: 0 var(--ki-space-lg);
}

.ki-nav__tab {
  padding: var(--ki-space-sm) var(--ki-space-md);
  color: rgba(255,255,255,.7);
  font-size: var(--ki-font-size-sm);
  font-weight: var(--ki-font-semi);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color var(--ki-transition-fast), border-color var(--ki-transition-fast);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.ki-nav__tab:hover:not([disabled]) {
  color: #fff;
}

.ki-nav__tab--active {
  color: #fff;
  border-bottom-color: var(--ki-color-accent);
}

.ki-nav__tab[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.ki-main {
  flex: 1;
  padding: var(--ki-space-xl) var(--ki-space-lg);
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
}

/* ── Dashboard ──────────────────────────────── */

.ki-dashboard__eyebrow {
  font-size: var(--ki-font-size-sm);
  font-weight: var(--ki-font-bold);
  color: var(--ki-color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--ki-space-xs);
}

.ki-dashboard__title {
  font-size: var(--ki-font-size-xl);
  font-weight: var(--ki-font-bold);
  color: var(--ki-color-primary);
  margin-bottom: var(--ki-space-xs);
}

.ki-dashboard__subtitle {
  color: var(--ki-color-text-light);
  margin-bottom: var(--ki-space-xl);
}

.ki-dashboard__section-title {
  font-size: var(--ki-font-size-lg);
  font-weight: var(--ki-font-bold);
  color: var(--ki-color-primary);
  margin-top: var(--ki-space-2xl);
  margin-bottom: var(--ki-space-xs);
}

.ki-license-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ki-space-md);
  flex-wrap: wrap;
  background: linear-gradient(135deg, #1A3650 0%, #234B73 100%);
  color: #fff;
  border-radius: var(--ki-radius-lg);
  padding: var(--ki-space-lg) var(--ki-space-xl);
  margin-bottom: var(--ki-space-xl);
  box-shadow: var(--ki-shadow-md);
}

.ki-license-banner__text {
  flex: 1;
  min-width: 0;
}

.ki-license-banner__eyebrow {
  font-size: var(--ki-font-size-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.75;
  margin-bottom: var(--ki-space-xs);
}

.ki-license-banner__headline {
  font-size: var(--ki-font-size-lg);
  font-weight: var(--ki-font-bold);
  line-height: var(--ki-line-tight);
  margin-bottom: var(--ki-space-xs);
}

.ki-license-banner__sub {
  font-size: var(--ki-font-size-sm);
  opacity: 0.85;
}

.ki-license-banner__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--ki-space-xs);
  background: var(--ki-color-accent);
  color: #fff;
  font-weight: var(--ki-font-bold);
  font-size: var(--ki-font-size-md);
  padding: var(--ki-space-sm) var(--ki-space-lg);
  border-radius: var(--ki-radius-md);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s;
}

.ki-license-banner__cta:hover {
  background: var(--ki-color-accent-dark);
}

@media (prefers-reduced-motion: reduce) {
  .ki-license-banner__cta { transition: none; }
}

.ki-module-grid {
  display: grid;
  gap: var(--ki-space-md);
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .ki-module-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.ki-module-card {
  background: var(--ki-color-bg-light);
  border: 1px solid var(--ki-color-border);
  border-radius: var(--ki-radius-lg);
  padding: var(--ki-space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--ki-space-sm);
  transition: box-shadow var(--ki-transition-fast), transform var(--ki-transition-fast);
}

.ki-module-card:not(.ki-module-card--locked):hover {
  box-shadow: var(--ki-shadow-md);
  transform: translateY(-2px);
}

.ki-module-card--locked {
  opacity: 0.6;
  cursor: not-allowed;
}

.ki-module-card--completed {
  border-color: var(--ki-color-accent);
  background: #F0FAF0;
}

.ki-module-card__title {
  font-weight: var(--ki-font-bold);
  color: var(--ki-color-primary);
}

.ki-module-card__meta {
  font-size: var(--ki-font-size-sm);
  color: var(--ki-color-text-light);
}

/* ── Buttons ────────────────────────────────── */

.ki-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ki-space-xs);
  padding: var(--ki-space-sm) var(--ki-space-lg);
  border-radius: var(--ki-radius-md);
  font-weight: var(--ki-font-semi);
  font-size: var(--ki-font-size-md);
  text-decoration: none;
  transition: background var(--ki-transition-fast), transform var(--ki-transition-fast);
  cursor: pointer;
}

.ki-btn:focus-visible {
  outline: 3px solid var(--ki-color-accent);
  outline-offset: 2px;
}

.ki-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.ki-btn--primary {
  background: var(--ki-color-primary);
  color: #fff;
}

.ki-btn--primary:hover {
  background: var(--ki-color-primary-light);
}

.ki-btn--accent {
  background: var(--ki-color-accent);
  color: #fff;
}

.ki-btn--accent:hover {
  background: var(--ki-color-accent-dark);
}

.ki-btn--ghost {
  background: transparent;
  color: var(--ki-color-primary);
  border: 2px solid var(--ki-color-primary);
}

.ki-btn--ghost:hover {
  background: var(--ki-color-bg-light);
}

.ki-btn:active {
  transform: scale(0.98);
}

/* ── XP + Gamification ──────────────────────── */

.ki-xp-bar {
  display: flex;
  align-items: center;
  gap: var(--ki-space-sm);
  font-size: var(--ki-font-size-sm);
  color: rgba(255,255,255,.85);
}

.ki-xp-bar__track {
  width: 80px;
  height: 6px;
  background: rgba(255,255,255,.3);
  border-radius: 3px;
  overflow: hidden;
}

.ki-xp-bar__fill {
  height: 100%;
  background: var(--ki-color-accent);
  border-radius: 3px;
  transition: width var(--ki-transition-slow);
}

.ki-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--ki-space-xs);
  background: var(--ki-color-accent);
  color: #fff;
  font-size: var(--ki-font-size-xs);
  font-weight: var(--ki-font-bold);
  padding: 2px var(--ki-space-sm);
  border-radius: var(--ki-radius-sm);
}

/* ── Feedback-Nachrichten ───────────────────── */

.ki-feedback {
  padding: var(--ki-space-md);
  border-radius: var(--ki-radius-md);
  margin-top: var(--ki-space-md);
  font-size: var(--ki-font-size-sm);
  line-height: var(--ki-line-normal);
}

.ki-feedback--correct {
  background: #EBF9E8;
  border: 1px solid var(--ki-color-accent);
  color: #2A6024;
}

.ki-feedback--incorrect {
  background: #FDF2F2;
  border: 1px solid #E8A0A0;
  color: #7B2020;
}

/* ── Utilities ──────────────────────────────── */

.ki-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Reduced Motion ─────────────────────────── */

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

  html {
    scroll-behavior: auto;
  }
}