/* ===== Zmienne motywów ===== */
:root {
  --bg: #fafafa;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #ffffff;
  --text: #111111;
  --text-muted: #6b6b6b;
  --border: rgba(0, 0, 0, 0.09);
  --accent: #111111;
  --accent-contrast: #ffffff;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
  --canvas-dot: 40, 40, 40;
  --radius: 16px;
  --topbar-h: 68px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --bg: #0b0b0c;
  --surface: rgba(24, 24, 26, 0.72);
  --surface-solid: #161618;
  --text: #f2f2f2;
  --text-muted: #9a9a9f;
  --border: rgba(255, 255, 255, 0.09);
  --accent: #f2f2f2;
  --accent-contrast: #0b0b0c;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  --canvas-dot: 220, 220, 225;
}

/* ===== Reset i baza ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.5s ease, color 0.5s ease;
}

h1, h2 { line-height: 1.15; letter-spacing: -0.025em; margin: 0; }
p { margin: 0; }
a { color: inherit; }
code {
  font-size: 0.9em; padding: 2px 6px; border-radius: 6px;
  background: var(--border);
}
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ===== Canvas tła ===== */
#bg-canvas {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* ===== Górny pasek ===== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--topbar-h);
  background: var(--surface);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--border);
  transition: background 0.5s ease, border-color 0.5s ease;
}
.topbar__inner {
  max-width: 1160px; height: 100%;
  margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}

.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; letter-spacing: -0.03em; }
.logo__mark {
  width: 22px; height: 22px; border-radius: 6px;
  background: var(--accent);
  position: relative; transition: background 0.5s ease, transform 0.6s var(--ease);
}
.logo__mark::after {
  content: ""; position: absolute; inset: 6px;
  border-radius: 50%; background: var(--accent-contrast);
}
.logo:hover .logo__mark { transform: rotate(90deg); }
.logo__text { font-size: 1.1rem; }

.tabs { display: flex; gap: 4px; padding: 4px; border-radius: 999px; background: var(--border); }
.tab {
  font: inherit; font-size: 0.875rem; font-weight: 500;
  padding: 8px 16px; border: 0; border-radius: 999px;
  background: transparent; color: var(--text-muted);
  cursor: pointer; transition: all 0.3s var(--ease); white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.is-active { background: var(--surface-solid); color: var(--text); box-shadow: 0 1px 6px rgba(0,0,0,.12); }

.topbar__right { display: flex; align-items: center; gap: 18px; }

.clock { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.2; }
.clock__time { font-size: 0.95rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.clock__date { font-size: 0.72rem; color: var(--text-muted); text-transform: capitalize; }

/* ===== Switch motywu ===== */
.switch {
  position: relative; width: 60px; height: 32px; padding: 0;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--border); cursor: pointer; flex-shrink: 0;
  transition: background 0.4s ease;
}
.switch__icon {
  position: absolute; top: 50%; transform: translateY(-50%);
  font-size: 0.85rem; color: var(--text-muted); pointer-events: none;
}
.switch__icon--sun { left: 9px; }
.switch__icon--moon { right: 9px; }
.switch__thumb {
  position: absolute; top: 3px; left: 3px;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--accent);
  transition: transform 0.45s var(--ease), background 0.4s ease;
}
[data-theme="dark"] .switch__thumb { transform: translateX(28px); }

/* ===== Układ i widoki ===== */
.content { flex: 1; width: 100%; max-width: 1160px; margin: 0 auto; padding: 56px 24px 72px; }

.view { animation: viewIn 0.55s var(--ease) both; }
.view[hidden] { display: none; }
@keyframes viewIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.eyebrow {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-muted); margin-bottom: 14px;
}

/* ===== Hero ===== */
.hero { padding: 48px 0 64px; max-width: 760px; }
.hero h1 { font-size: clamp(2.2rem, 6vw, 4.2rem); font-weight: 700; }
.hero__lead { margin: 22px 0 32px; font-size: 1.1rem; color: var(--text-muted); max-width: 560px; }

/* ===== Przyciski ===== */
.btn {
  font: inherit; font-size: 0.95rem; font-weight: 600;
  padding: 12px 22px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--surface-solid); color: var(--text);
  cursor: pointer; transition: transform 0.25s var(--ease), background 0.3s, box-shadow 0.3s;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.btn--block { width: 100%; }
.btn--icon { padding: 10px 16px; font-size: 0.85rem; white-space: nowrap; }

/* ===== Karty ===== */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 20px; }
.card {
  display: flex; flex-direction: column; gap: 12px;
  padding: 28px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), background 0.5s, border-color 0.5s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.card__tag {
  align-self: flex-start; font-size: 0.72rem; font-weight: 600;
  padding: 4px 10px; border-radius: 999px; background: var(--border); color: var(--text-muted);
}
.card__title { font-size: 1.3rem; font-weight: 600; }
.card__text { color: var(--text-muted); font-size: 0.95rem; flex: 1; }
.card__link { font-size: 0.9rem; font-weight: 600; text-decoration: none; margin-top: 6px; }
.card__link:hover { text-decoration: underline; text-underline-offset: 4px; }

/* ===== Widget generatora ===== */
.widget {
  max-width: 560px; margin: 0 auto; padding: 40px;
  border-radius: 24px; background: var(--surface); border: 1px solid var(--border);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  transition: background 0.5s, border-color 0.5s;
}
.widget__title { font-size: 2rem; font-weight: 700; }
.widget__lead { color: var(--text-muted); margin: 8px 0 28px; font-size: 0.95rem; }

.output {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 14px 14px 18px; border-radius: 14px;
  background: var(--surface-solid); border: 1px solid var(--border);
}
.output__value {
  flex: 1; min-width: 0; overflow-x: auto; white-space: nowrap;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.05rem; letter-spacing: 0.02em; scrollbar-width: none;
}
.output__value::-webkit-scrollbar { display: none; }

.meter { height: 6px; border-radius: 999px; background: var(--border); margin-top: 16px; overflow: hidden; }
.meter__bar { height: 100%; width: 0; border-radius: 999px; background: var(--accent); transition: width 0.5s var(--ease), opacity 0.4s; }
.meter__label { margin: 8px 0 26px; font-size: 0.8rem; color: var(--text-muted); }

.field { margin-bottom: 22px; }
.field__label { display: block; margin-bottom: 12px; font-size: 0.9rem; color: var(--text-muted); }
.field__label strong { color: var(--text); font-variant-numeric: tabular-nums; }

.range { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 999px; background: var(--border); outline: none; }
.range::-webkit-slider-thumb {
  -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--surface-solid); cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,.3); transition: transform .2s;
}
.range::-webkit-slider-thumb:hover { transform: scale(1.15); }
.range::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--surface-solid); cursor: pointer;
}

.options { border: 0; padding: 0; margin: 0 0 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.check { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; cursor: pointer; user-select: none; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); cursor: pointer; }

/* ===== Stopka ===== */
.footer { text-align: center; padding: 28px 24px; color: var(--text-muted); border-top: 1px solid var(--border); }

/* ===== Responsywność ===== */
@media (max-width: 860px) {
  .clock__date { display: none; }
}
@media (max-width: 720px) {
  :root { --topbar-h: auto; }
  .topbar { height: auto; }
  .topbar__inner { flex-wrap: wrap; padding: 12px 16px; }
  .tabs { order: 3; width: 100%; justify-content: center; }
  .tab { flex: 1; padding: 9px 10px; }
  .content { padding: 32px 16px 56px; }
  .hero { padding: 24px 0 40px; }
  .widget { padding: 26px 20px; }
  .options { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; }
}