/* Skrzypacz — time-of-day themes, zero dependencies */

:root {
  color-scheme: dark;

  --toggle-index: 0;
  --toggle-step: 1.25rem;
  --toggle-thumb-size: 1.375rem;
  --bg: #18181c;
  --ink: #8a8680;
  --shine: #c9c5bd;
  --muted: #5c5a56;
  --accent: #9a96ae;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-border: rgba(255, 255, 255, 0.1);
  --theme-color: #18181c;
  --toggle-track: rgba(255, 255, 255, 0.08);
  --toggle-thumb-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  --ease-theme: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-theme: 0.55s;
}

[data-theme="morning"] {
  color-scheme: light;
  --bg: #f4ede4;
  --ink: #5c534a;
  --shine: #fff9f2;
  --muted: #9a9088;
  --accent: #b8886a;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-border: rgba(92, 83, 74, 0.14);
  --theme-color: #f4ede4;
  --toggle-track: rgba(184, 136, 106, 0.16);
  --toggle-thumb-shadow: 0 4px 14px rgba(92, 83, 74, 0.14);
}

[data-theme="afternoon"] {
  color-scheme: light;
  --bg: #eceae6;
  --ink: #4a4844;
  --shine: #faf8f4;
  --muted: #8a8680;
  --accent: #5a6b5c;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-border: rgba(74, 72, 68, 0.12);
  --theme-color: #eceae6;
  --toggle-track: rgba(90, 107, 92, 0.14);
  --toggle-thumb-shadow: 0 4px 14px rgba(74, 72, 68, 0.12);
}

[data-theme="evening"] {
  color-scheme: dark;
  --bg: #252029;
  --ink: #a89888;
  --shine: #d4b896;
  --muted: #6a625c;
  --accent: #c48868;
  --surface: rgba(255, 255, 255, 0.08);
  --surface-border: rgba(212, 184, 150, 0.16);
  --theme-color: #252029;
  --toggle-track: rgba(196, 136, 104, 0.18);
  --toggle-thumb-shadow: 0 4px 14px rgba(0, 0, 0, 0.32);
}

[data-theme="night"] {
  color-scheme: dark;
  --bg: #18181c;
  --ink: #8a8680;
  --shine: #c9c5bd;
  --muted: #5c5a56;
  --accent: #9a96ae;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-border: rgba(255, 255, 255, 0.1);
  --theme-color: #18181c;
  --toggle-track: rgba(255, 255, 255, 0.08);
  --toggle-thumb-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  height: 100%;
  margin: 0;
  background-color: var(--bg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  transition:
    background-color var(--duration-theme) var(--ease-theme),
    color var(--duration-theme) var(--ease-theme);
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 0.45s;
  animation-timing-function: var(--ease-theme);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  transition: background-color var(--duration-theme) var(--ease-theme);
}

.skip-link:focus {
  top: 1rem;
}

/* Header + theme toggle */

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 50;
  padding: 1rem 1.25rem;
  pointer-events: none;
}

.theme-toggle {
  pointer-events: auto;
  display: block;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.theme-toggle__track {
  display: block;
  position: relative;
  width: calc(var(--toggle-thumb-size) + 4 * var(--toggle-step) + 0.25rem);
  height: 1.75rem;
  border-radius: 999px;
  background: var(--toggle-track);
  border: 1px solid var(--surface-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition:
    background-color var(--duration-theme) var(--ease-theme),
    border-color var(--duration-theme) var(--ease-theme),
    box-shadow var(--duration-theme) var(--ease-theme);
}

.theme-toggle__slots {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  align-items: center;
  padding-inline: 0.45rem;
  pointer-events: none;
}

.theme-toggle__slot {
  justify-self: center;
  width: 0.25rem;
  height: 0.25rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 28%, transparent);
  transition:
    background-color var(--duration-theme) var(--ease-theme),
    transform var(--duration-theme) var(--ease-theme);
}

[data-theme-selection="auto"] .theme-toggle__slot:nth-child(1),
[data-theme-selection="morning"] .theme-toggle__slot:nth-child(2),
[data-theme-selection="afternoon"] .theme-toggle__slot:nth-child(3),
[data-theme-selection="evening"] .theme-toggle__slot:nth-child(4),
[data-theme-selection="night"] .theme-toggle__slot:nth-child(5) {
  background: var(--accent);
  transform: scale(1.35);
}

.theme-toggle__thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: var(--toggle-thumb-size);
  height: var(--toggle-thumb-size);
  border-radius: 50%;
  background: var(--surface);
  box-shadow: var(--toggle-thumb-shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translateX(calc(var(--toggle-index, 0) * var(--toggle-step)));
  transition:
    transform var(--duration-theme) var(--ease-theme),
    background-color var(--duration-theme) var(--ease-theme),
    box-shadow var(--duration-theme) var(--ease-theme);
}

.theme-toggle__icon {
  position: absolute;
  width: 0.875rem;
  height: 0.875rem;
  color: var(--accent);
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
  transition:
    opacity var(--duration-theme) var(--ease-theme),
    transform var(--duration-theme) var(--ease-theme),
    color var(--duration-theme) var(--ease-theme);
}

[data-theme-selection="auto"] .theme-toggle__icon--auto,
[data-theme-selection="morning"] .theme-toggle__icon--morning,
[data-theme-selection="afternoon"] .theme-toggle__icon--afternoon,
[data-theme-selection="evening"] .theme-toggle__icon--evening,
[data-theme-selection="night"] .theme-toggle__icon--night {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-toggle:active .theme-toggle__thumb {
  transform: translateX(calc(var(--toggle-index, 0) * var(--toggle-step))) scale(0.94);
}

/* Layout */

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

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

.name {
  margin: 0;
  font-size: clamp(2.5rem, 12vw, 5.5rem);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: transparent;
  background-image:
    linear-gradient(
      135deg,
      transparent 44%,
      var(--shine) 50%,
      transparent 56%
    ),
    linear-gradient(var(--ink), var(--ink));
  background-size: 200% 200%, 100% 100%;
  background-repeat: repeat, no-repeat;
  background-position: 100% 100%, center;
  -webkit-background-clip: text;
  background-clip: text;
  animation: sweep 9s linear infinite;
  transition: background-image var(--duration-theme) var(--ease-theme);
}

.foot {
  padding: 1.25rem 1.5rem 1.75rem;
  text-align: center;
  transition: color var(--duration-theme) var(--ease-theme);
}

.foot p {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color var(--duration-theme) var(--ease-theme);
}

@keyframes sweep {
  to {
    background-position: 0% 0%, center;
  }
}

@media (prefers-reduced-motion: reduce) {
  body,
  .name,
  .foot p,
  .theme-toggle__thumb,
  .theme-toggle__icon,
  .theme-toggle__track,
  .skip-link {
    transition: none;
  }

  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none;
  }

  .name {
    animation: none;
    background: var(--ink);
    -webkit-background-clip: text;
    background-clip: text;
  }
}