/* K.I.S. — shared brand styles. One accent color, system fonts, light/dark via prefers-color-scheme. */

:root {
  --kis-accent: #e85d3f;
  --kis-accent-hover: #d84f32;
  --kis-accent-contrast: #ffffff;
  --kis-bg: #ffffff;
  --kis-surface: #f5f6f8;
  --kis-card: #ffffff;
  --kis-text: #1a1d21;
  --kis-text-muted: #5b6270;
  --kis-border: #e2e4e9;
  --kis-focus: #e85d3f;
  --kis-radius: 12px;
  --kis-radius-pill: 999px;
  --kis-max-width: 640px;
  --kis-font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --kis-shadow: 0 1px 2px rgba(20, 20, 20, 0.04), 0 8px 24px rgba(20, 20, 20, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --kis-accent: #ff8163;
    --kis-accent-hover: #ff926f;
    --kis-accent-contrast: #17110d;
    --kis-bg: #14161a;
    --kis-surface: #1d2025;
    --kis-card: #1a1d22;
    --kis-text: #f2f3f5;
    --kis-text-muted: #9aa1ac;
    --kis-border: #2c2f36;
    --kis-focus: #ff8163;
    --kis-shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light dark;
}

body {
  margin: 0;
  font-family: var(--kis-font);
  background: var(--kis-bg);
  color: var(--kis-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Standard page frame: header, app, about, footer */

.kis-page {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.kis-header {
  padding: 1.25rem 1rem 0.5rem;
  text-align: center;
}

.kis-brand {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--kis-text-muted);
  text-decoration: none;
  min-height: 44px;
  line-height: 44px;
}

.kis-brand:hover {
  color: var(--kis-accent);
}

.kis-header h1 {
  margin: 0;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.kis-subtitle {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  color: var(--kis-text-muted);
}

.kis-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem;
}

.kis-app {
  width: 100%;
  max-width: var(--kis-max-width);
  margin: 0 auto;
  background: var(--kis-card);
  border: 1px solid var(--kis-border);
  border-radius: 20px;
  box-shadow: var(--kis-shadow);
  padding: 2.5rem 1.5rem;
}

.kis-about {
  max-width: var(--kis-max-width);
  margin: 0 auto;
  padding: 1.5rem 1rem;
  color: var(--kis-text-muted);
  font-size: 0.95rem;
}

.kis-about h2 {
  color: var(--kis-text);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.kis-faq {
  margin: 0;
}

.kis-faq dt {
  font-weight: 700;
  color: var(--kis-text);
  margin-top: 1.1rem;
}

.kis-faq dt:first-child {
  margin-top: 0;
}

.kis-faq dd {
  margin: 0.3rem 0 0;
}

.kis-footer {
  padding: 1.5rem 1rem 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--kis-text-muted);
  border-top: 1px solid var(--kis-border);
}

.kis-footer a {
  color: var(--kis-text-muted);
  text-decoration: underline;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 0.4rem;
}

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

.kis-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  justify-content: center;
  margin: 0.25rem 0;
}

/* Buttons — large touch targets */

.kis-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 0.75rem 1.5rem;
  border-radius: var(--kis-radius-pill);
  border: 1px solid var(--kis-border);
  background: var(--kis-surface);
  color: var(--kis-text);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease;
}

.kis-btn:hover {
  background: var(--kis-border);
}

.kis-btn:active {
  transform: scale(0.97);
}

.kis-btn-primary {
  background: var(--kis-accent);
  color: var(--kis-accent-contrast);
  border-color: transparent;
  font-weight: 700;
  box-shadow: var(--kis-shadow);
}

.kis-btn-primary:hover {
  background: var(--kis-accent-hover);
}

.kis-btn-supporter {
  font-size: 0.85rem;
  padding: 0 1rem;
}

/* Accessibility: visible focus, reduced motion */

:focus-visible {
  outline: 3px solid var(--kis-focus);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}