/* ============================================================
   Unsere Zeit — anniversary love counter
   ------------------------------------------------------------
   Art direction: bright, warm, calm and personal. A single
   centered composition on soft ivory, with quiet floating
   hearts behind elevated counter cards. Refined, not kitschy.

   Palette: warm cream background, one muted raspberry accent,
   pale blush surfaces, deep warm charcoal text. One hue only,
   neutral support, WCAG AA contrast in both themes.

   Typography: Boska (elegant display serif) for the headline,
   General Sans for UI and numbers. Fluid sizes via clamp(),
   tabular figures so ticking digits never shift width.

   Density: airy and unhurried — generous spacing on a 4px
   scale, small amount of content, lots of calm space.
   ============================================================ */

/* ---------- Design tokens ---------- */

:root {
  /* Color — light theme (default) */
  --color-bg: #fbf6ef;
  --color-bg-soft: #f7ede6;
  --color-surface: #fffbf6;
  --color-surface-blush: #fdf1ee;
  --color-text: #3e2a2e;
  --color-text-soft: #7a5c63;
  --color-accent: #b3405b;
  --color-accent-strong: #97324b;
  --color-border: rgba(151, 50, 75, 0.14);
  --color-heart: #c9718a;
  --color-focus: #97324b;

  /* Type scale (fluid) */
  --font-display: "Boska", Georgia, "Times New Roman", serif;
  --font-body: "General Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --text-sm: clamp(0.875rem, 0.84rem + 0.2vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.5rem);
  --text-display: clamp(2.375rem, 1.6rem + 3.9vw, 4.5rem);
  --text-number-lg: clamp(2rem, 1.5rem + 2.5vw, 3.25rem);
  --text-number-sm: clamp(1.5rem, 1.2rem + 1.5vw, 2.25rem);

  /* Spacing (4px scale) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-full: 999px;

  /* Shadow */
  --shadow-card: 0 1px 2px rgba(93, 42, 55, 0.05), 0 10px 30px -12px rgba(93, 42, 55, 0.22);
  --shadow-card-soft: 0 1px 2px rgba(93, 42, 55, 0.04), 0 6px 20px -10px rgba(93, 42, 55, 0.16);

  /* Motion */
  --transition-fast: 160ms ease;
  --transition-medium: 300ms ease;
}

:root[data-theme="dark"] {
  --color-bg: #221a1d;
  --color-bg-soft: #281f22;
  --color-surface: #2d2327;
  --color-surface-blush: #32262b;
  --color-text: #f3e7e4;
  --color-text-soft: #c5a8ae;
  --color-accent: #e08ba0;
  --color-accent-strong: #eba4b6;
  --color-border: rgba(224, 139, 160, 0.18);
  --color-heart: #b06a7e;
  --color-focus: #eba4b6;
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px -12px rgba(0, 0, 0, 0.5);
  --shadow-card-soft: 0 1px 2px rgba(0, 0, 0, 0.25), 0 6px 20px -10px rgba(0, 0, 0, 0.4);
}

/* ---------- Base ---------- */

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

html {
  color-scheme: light;
}

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  /* Barely-there warmth from top; intentionally subtle */
  background-image: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 40%);
  transition: background-color var(--transition-medium), color var(--transition-medium);
  overflow-x: hidden;
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

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

.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  color: var(--color-accent-strong);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-weight: 500;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--transition-fast);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---------- Layout shell ---------- */

.page {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  max-width: 68rem;
  margin-inline: auto;
  padding: var(--space-4) var(--space-4) var(--space-6);
}

/* ---------- Header ---------- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-accent);
}

.brand__label {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-accent-strong);
  cursor: pointer;
  box-shadow: var(--shadow-card-soft);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-surface-blush);
}

.theme-toggle:active {
  transform: scale(0.94);
}

/* Show the icon of the theme the button switches to */
.theme-toggle__icon--sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle__icon--sun {
  display: block;
}

:root[data-theme="dark"] .theme-toggle__icon--moon {
  display: none;
}

/* ---------- Hero ---------- */

.site-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-8) 0;
}

.hero {
  text-align: center;
}

.hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0.005em;
  color: var(--color-text);
  text-wrap: balance;
}

.hero__date {
  margin: var(--space-3) 0 0;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-accent-strong);
}

.hero__closing {
  margin: var(--space-6) 0 0;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text-soft);
}

.hero__hint {
  margin: var(--space-8) 0 0;
  font-size: var(--text-sm);
  color: var(--color-text-soft);
}

/* ---------- Counter cards ---------- */

.counter {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-3);
  max-width: 52rem;
  margin: var(--space-8) auto 0;
}

.counter-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-width: 0;
  padding: var(--space-6) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: background-color var(--transition-medium), border-color var(--transition-medium);
}

.counter-card--primary {
  grid-column: span 2;
}

.counter-card--secondary {
  grid-column: span 3;
  padding-block: var(--space-4);
  background: var(--color-surface-blush);
  box-shadow: var(--shadow-card-soft);
}

.counter-card__value {
  font-size: var(--text-number-lg);
  font-weight: 600;
  line-height: 1.1;
  color: var(--color-accent-strong);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

.counter-card--secondary .counter-card__value {
  font-size: var(--text-number-sm);
}

.counter-card__label {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

/* Subtle tick on digit change: transform/opacity only, no layout shift */
@keyframes value-tick {
  0% {
    opacity: 0.35;
    transform: translateY(0.12em);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.counter-card__value.is-ticking {
  animation: value-tick 280ms ease-out;
}

/* ---------- Config error (owner-facing) ---------- */

.config-error {
  max-width: 40rem;
  margin: 0 auto var(--space-8);
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface-blush);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  color: var(--color-text);
  text-align: center;
}

/* ---------- Footer ---------- */

.site-footer {
  padding-top: var(--space-8);
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-soft);
}

/* ---------- Load banner ---------- */

.load-banner {
  position: fixed;
  inset: 0;
  z-index: 70;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-8) var(--space-6);
  background: var(--color-bg);
  text-align: center;
  cursor: pointer;
  animation: banner-in 500ms ease;
  transition: opacity var(--transition-medium);
}

.load-banner.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.load-banner__text {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-accent-strong);
  text-wrap: balance;
}

.load-banner__hint {
  margin: 0;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

@keyframes banner-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ---------- Hearts ---------- */

.hearts-layer {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  user-select: none;
}

.hearts-layer--background {
  z-index: 0;
}

.hearts-layer--burst {
  z-index: 50;
}

.heart {
  position: absolute;
  color: var(--color-heart);
  line-height: 1;
  will-change: transform, opacity;
}

.heart--background {
  bottom: -3rem;
  font-size: var(--heart-size, 1.5rem);
  opacity: 0;
  animation: heart-rise var(--heart-duration, 18s) linear var(--heart-delay, 0s) forwards;
}

@keyframes heart-rise {
  0% {
    opacity: 0;
    transform: translate3d(0, 0, 0) rotate(var(--heart-rotate-from, -8deg));
  }
  12% {
    opacity: var(--heart-opacity, 0.18);
  }
  85% {
    opacity: var(--heart-opacity, 0.18);
  }
  100% {
    opacity: 0;
    transform: translate3d(var(--heart-drift, 2rem), calc(-100vh - 8rem), 0) rotate(var(--heart-rotate-to, 10deg));
  }
}

.heart--burst {
  font-size: var(--heart-size, 1.25rem);
  color: var(--color-accent);
  animation: heart-burst var(--heart-duration, 1.2s) ease-out forwards;
}

@keyframes heart-burst {
  0% {
    opacity: 0.9;
    transform: translate(-50%, -50%) scale(0.6) rotate(0deg);
  }
  25% {
    transform: translate(calc(-50% + var(--heart-drift, 0px) * 0.3), calc(-50% - var(--heart-rise, 90px) * 0.25)) scale(var(--heart-scale, 1)) rotate(calc(var(--heart-rotate, 14deg) * 0.4));
  }
  100% {
    opacity: 0;
    transform: translate(calc(-50% + var(--heart-drift, 0px)), calc(-50% - var(--heart-rise, 90px))) scale(calc(var(--heart-scale, 1) * 0.85)) rotate(var(--heart-rotate, 14deg));
  }
}

@keyframes heart-burst-still {
  0% {
    opacity: 0.8;
    transform: translate(-50%, -50%);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%);
  }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  .heart--background {
    animation: none;
    opacity: calc(var(--heart-opacity, 0.18) * 0.7);
    bottom: auto;
    top: var(--heart-static-top, 50%);
    transform: rotate(var(--heart-rotate-from, -8deg));
  }

  .heart--burst {
    animation: heart-burst-still 900ms ease-out forwards;
  }

  .counter-card__value.is-ticking {
    animation: none;
  }

  .theme-toggle,
  .skip-link,
  body {
    transition: none;
  }

  .load-banner {
    animation: none;
    transition: none;
  }
}

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width: 48rem) {
  .counter {
    gap: var(--space-2);
  }
}

/* Mobile: years/months/days keep one row via 2-col grid with a full-width lead */
@media (max-width: 35rem) {
  .counter {
    grid-template-columns: repeat(2, 1fr);
  }

  .counter-card--primary {
    grid-column: span 2;
  }

  .counter-card--secondary {
    grid-column: span 1;
  }

  .site-main {
    padding: var(--space-6) 0;
  }
}

/* Slightly wider phones: fit the three primary cards in one row */
@media (min-width: 24rem) and (max-width: 35rem) {
  .counter {
    grid-template-columns: repeat(6, 1fr);
  }

  .counter-card--primary {
    grid-column: span 2;
    padding-inline: var(--space-2);
  }

  .counter-card--secondary {
    grid-column: span 3;
  }
}