/* ==========================================================================
   Kalendarz Odpadów — style
   Self-hosted fonts (CSP: font-src 'self'), OKLCH with hex fallbacks,
   flattened selectors (no CSS nesting), dark mode, reduced motion.
   Fonts: Plus Jakarta Sans + JetBrains Mono (OFL, via Google Fonts),
   latin + latin-ext subsets only. Regeneration recipe: see README.md.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Fonts (variable, weights 400-800; unicode-range copied from Google Fonts)
   -------------------------------------------------------------------------- */
@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url('/fonts/plus-jakarta-sans-var-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url('/fonts/plus-jakarta-sans-var-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url('/fonts/jetbrains-mono-var-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url('/fonts/jetbrains-mono-var-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* --------------------------------------------------------------------------
   Design tokens (hex fallback first for pre-OKLCH browsers, then OKLCH)
   -------------------------------------------------------------------------- */
:root {
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, monospace;

  /* Surfaces & Ambient Lighting */
  --bg-page: #f3f5f7;
  --bg-page: oklch(0.978 0.006 240);
  --bg-card: #ffffff;
  --bg-card: oklch(1 0 0);
  --bg-card-glass: rgba(255, 255, 255, 0.9);
  --bg-card-glass: oklch(1 0 0 / 0.88);
  --bg-input: #fafbfc;
  --bg-input: oklch(0.99 0.003 240);
  --bg-input-hover: #f3f5f7;
  --bg-input-hover: oklch(0.978 0.006 240);
  --bg-subtle: #eef1f4;
  --bg-subtle: oklch(0.965 0.008 240);

  /* Primary Palette */
  --primary: #17934a;
  --primary: oklch(0.58 0.175 145);
  --primary-hover: #127c3d;
  --primary-hover: oklch(0.52 0.19 145);
  --primary-active: #0d6330;
  --primary-active: oklch(0.46 0.20 145);
  --primary-surface: #e3f5e8;
  --primary-surface: oklch(0.96 0.04 145);
  --primary-border: #a4d9b4;
  --primary-border: oklch(0.84 0.09 145);
  --primary-glow: rgba(23, 147, 74, 0.25);
  --primary-glow: oklch(0.58 0.175 145 / 0.25);
  --primary-gradient-end: #159a4e;
  --primary-gradient-end: oklch(0.52 0.18 150);
  --primary-hover-gradient-end: #118540;
  --primary-hover-gradient-end: oklch(0.48 0.19 150);
  --card-inset-ring: rgba(255, 255, 255, 0.7);
  --card-inset-ring: oklch(1 0 0 / 0.7);

  /* Neutrals & Text */
  --text-main: #1a2029;
  --text-main: oklch(0.18 0.025 240);
  --text-muted: #4b5563;
  --text-muted: oklch(0.42 0.03 240);
  --text-subtle: #6b7280;
  --text-subtle: oklch(0.60 0.02 240);
  --border-subtle: #e3e7eb;
  --border-subtle: oklch(0.90 0.012 240);
  --border-strong: #c3cad2;
  --border-strong: oklch(0.78 0.025 240);

  /* Status Colors */
  --error-bg: #faeae7;
  --error-bg: oklch(0.97 0.035 25);
  --error-border: #efc4bd;
  --error-border: oklch(0.88 0.09 25);
  --error-fg: #b3261e;
  --error-fg: oklch(0.48 0.20 25);

  --success-bg: #e7f6ec;
  --success-bg: oklch(0.975 0.03 145);
  --success-border: #bfe4cb;
  --success-border: oklch(0.86 0.08 145);
  --success-fg: #1e7a44;
  --success-fg: oklch(0.35 0.14 145);

  /* Waste Categories (hue per category; zielone/resztkowe are app additions) */
  --cat-plastik-bg: #f5eecd;
  --cat-plastik-bg: oklch(0.96 0.07 95);
  --cat-plastik-border: #e2cd85;
  --cat-plastik-border: oklch(0.84 0.14 95);
  --cat-plastik-fg: #8a6414;
  --cat-plastik-fg: oklch(0.44 0.15 85);

  --cat-papier-bg: #e3eaf8;
  --cat-papier-bg: oklch(0.95 0.05 235);
  --cat-papier-border: #b0c4e8;
  --cat-papier-border: oklch(0.80 0.12 235);
  --cat-papier-fg: #2c4a8a;
  --cat-papier-fg: oklch(0.38 0.16 235);

  --cat-szklo-bg: #dff2e5;
  --cat-szklo-bg: oklch(0.95 0.06 155);
  --cat-szklo-border: #a2d8b6;
  --cat-szklo-border: oklch(0.80 0.14 155);
  --cat-szklo-fg: #1f6e42;
  --cat-szklo-fg: oklch(0.36 0.15 155);

  --cat-bio-bg: #f4e8d7;
  --cat-bio-bg: oklch(0.94 0.06 60);
  --cat-bio-border: #dec494;
  --cat-bio-border: oklch(0.78 0.12 60);
  --cat-bio-fg: #7a5620;
  --cat-bio-fg: oklch(0.38 0.13 60);

  --cat-zmieszane-bg: #e9ebee;
  --cat-zmieszane-bg: oklch(0.92 0.015 240);
  --cat-zmieszane-border: #c0c6cd;
  --cat-zmieszane-border: oklch(0.76 0.025 240);
  --cat-zmieszane-fg: #363c45;
  --cat-zmieszane-fg: oklch(0.30 0.025 240);

  --cat-gabaryty-bg: #efe3f5;
  --cat-gabaryty-bg: oklch(0.95 0.05 310);
  --cat-gabaryty-border: #cfb3e0;
  --cat-gabaryty-border: oklch(0.80 0.12 310);
  --cat-gabaryty-fg: #65347f;
  --cat-gabaryty-fg: oklch(0.40 0.15 310);

  --cat-zielone-bg: #e2f2d9;
  --cat-zielone-bg: oklch(0.94 0.07 120);
  --cat-zielone-border: #b0d894;
  --cat-zielone-border: oklch(0.80 0.13 120);
  --cat-zielone-fg: #3d701f;
  --cat-zielone-fg: oklch(0.36 0.14 120);

  --cat-resztkowe-bg: #efeae2;
  --cat-resztkowe-bg: oklch(0.93 0.02 70);
  --cat-resztkowe-border: #cfc4b0;
  --cat-resztkowe-border: oklch(0.78 0.045 70);
  --cat-resztkowe-fg: #635841;
  --cat-resztkowe-fg: oklch(0.38 0.05 70);

  /* Geometry & Shadows */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 26px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.04), 0 1px 2px oklch(0 0 0 / 0.03);
  --shadow-md: 0 4px 16px rgba(35, 45, 60, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px oklch(0.2 0.02 240 / 0.06), 0 1px 3px oklch(0 0 0 / 0.04);
  --shadow-lg: 0 16px 40px rgba(35, 45, 60, 0.08), 0 4px 12px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 16px 40px oklch(0.2 0.02 240 / 0.08), 0 4px 12px oklch(0 0 0 / 0.03);
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  color-scheme: light;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  padding: clamp(16px, 4vw, 48px) 16px;
  display: grid;
  place-items: start center;
  background-image:
    radial-gradient(circle at 10% 10%, rgba(27, 147, 74, 0.10) 0px, transparent 45%),
    radial-gradient(circle at 90% 20%, rgba(44, 74, 138, 0.08) 0px, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(138, 100, 20, 0.07) 0px, transparent 50%);
  background-attachment: fixed;
}

.app-wrapper {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
  animation: cardEnter 0.45s var(--ease-spring);
}

@keyframes cardEnter {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
header {
  text-align: center;
}

h1 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-wrap: balance;
}

.header-icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Form
   -------------------------------------------------------------------------- */
form#form {
  background: var(--bg-card-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: clamp(22px, 4.5vw, 36px);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--card-inset-ring) inset;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: all 250ms var(--ease-spring);
}

form#form:has(:focus-visible) {
  border-color: var(--primary-border);
  box-shadow: var(--shadow-lg), 0 0 20px var(--primary-glow), 0 0 0 1px var(--card-inset-ring) inset;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.date-inputs-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.885rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: -0.015em;
  user-select: none;
  transition: color 150ms ease;
}

.form-group:focus-within label {
  color: var(--primary-hover);
}

/* Ikony SVG w etykietach (inline, dekoracyjne) */
.label-icon {
  flex-shrink: 0;
  color: var(--text-muted);
  transition: color 150ms ease, transform 150ms ease;
}

/* Podświetlenie ikony, gdy pole otrzymuje focus */
.form-group:focus-within .label-icon {
  color: var(--primary);
  transform: scale(1.08);
}

.required::after {
  content: " *";
  color: var(--error-fg);
  font-weight: 700;
}

.chip-group-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.885rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: -0.015em;
  user-select: none;
}

.cat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cat-chip {
  position: relative;
  cursor: pointer;
}

/* Wizualnie ukryty checkbox (dostępny dla czytników i klawiatury) */
.cat-chip input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.cat-chip span {
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1.5px solid var(--border-strong);
  color: var(--text-muted);
  background: var(--bg-input);
  cursor: pointer;
  user-select: none;
  transition: all 140ms var(--ease-spring);
}

.cat-chip:hover span {
  border-color: var(--primary-border);
  transform: translateY(-1px);
}

.cat-chip input:focus-visible + span {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow);
}

/* Odznaczony: przytłumiony, ale wyraźnie „wyłączony” */
.cat-chip input:not(:checked) + span {
  opacity: 0.72;
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}

/* Zaznaczony: kolory frakcji z istniejących zmiennych (jasny + ciemny motyw) */
.cat-chip input:checked + span {
  opacity: 1;
  text-decoration: none;
}

.cat-bio input:checked + span { background: var(--cat-bio-bg); color: var(--cat-bio-fg); border-color: var(--cat-bio-border); }
.cat-zielone input:checked + span { background: var(--cat-zielone-bg); color: var(--cat-zielone-fg); border-color: var(--cat-zielone-border); }
.cat-papier input:checked + span { background: var(--cat-papier-bg); color: var(--cat-papier-fg); border-color: var(--cat-papier-border); }
.cat-szklo input:checked + span { background: var(--cat-szklo-bg); color: var(--cat-szklo-fg); border-color: var(--cat-szklo-border); }
.cat-plastik input:checked + span { background: var(--cat-plastik-bg); color: var(--cat-plastik-fg); border-color: var(--cat-plastik-border); }
.cat-zmieszane input:checked + span { background: var(--cat-zmieszane-bg); color: var(--cat-zmieszane-fg); border-color: var(--cat-zmieszane-border); }
.cat-gabaryty input:checked + span { background: var(--cat-gabaryty-bg); color: var(--cat-gabaryty-fg); border-color: var(--cat-gabaryty-border); }
.cat-resztkowe input:checked + span { background: var(--cat-resztkowe-bg); color: var(--cat-resztkowe-fg); border-color: var(--cat-resztkowe-border); }

input, select {
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  background-color: var(--bg-input);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 15px;
  transition: all 150ms var(--ease-spring);
  outline: none;
}

input::placeholder {
  color: var(--text-subtle);
}

input:hover,
select:hover {
  background-color: var(--bg-input-hover);
  border-color: var(--border-strong);
}

input:focus,
select:focus {
  background-color: var(--bg-card);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow);
  transform: translateY(-1px);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23334155' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
  padding-right: 40px;
  cursor: pointer;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-gradient-end) 100%);
  color: #ffffff;
  padding: 14px 28px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: inherit;
  font-size: 1.025rem;
  font-weight: 700;
  width: 100%;
  margin-top: 8px;
  box-shadow: var(--shadow-md), 0 4px 16px var(--primary-glow);
  transition: all 160ms var(--ease-spring);
  user-select: none;
  position: relative;
  overflow: hidden;
}

button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.25) 50%, transparent 100%);
  transform: skewX(-25deg);
  transition: left 0.75s ease-in-out;
}

button:hover:not(:disabled)::before {
  left: 140%;
}

button:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-hover-gradient-end) 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 6px 20px var(--primary-glow);
}

button:active:not(:disabled) {
  transform: translateY(0);
}

button:disabled {
  background: var(--primary-border);
  color: var(--text-muted);
  cursor: wait;
}

/* Ikona w przyciskach (Generuj / Pobierz ICS) */
.btn-icon {
  flex-shrink: 0;
}

.download-btn {
  margin-top: 18px;
}

.download-btn button {
  margin-top: 0;
}

.hidden {
  display: none !important;
}

/* --------------------------------------------------------------------------
   Loading / error / results
   -------------------------------------------------------------------------- */
#loading {
  background: var(--bg-card-glass);
  border: 1.5px solid var(--primary-border);
  border-radius: var(--radius-xl);
  padding: 26px 20px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: pulseCard 2s infinite ease-in-out;
}

#loading strong {
  color: var(--primary);
  font-size: 1.05rem;
  font-weight: 800;
}

#loading p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

@keyframes pulseCard {
  0%, 100% { border-color: var(--primary-border); box-shadow: 0 4px 16px var(--primary-glow); }
  50% { border-color: var(--primary); box-shadow: 0 10px 28px var(--primary-glow); }
}

.error {
  color: var(--error-fg);
  background: var(--error-bg);
  border: 1.5px solid var(--error-border);
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  margin-top: 15px;
  font-size: 0.925rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.success {
  background: var(--bg-card-glass);
  border: 1px solid var(--border-subtle);
  padding: clamp(20px, 4vw, 32px);
  border-radius: var(--radius-xl);
  margin-top: 8px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.success h2 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--success-fg);
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.success h2 #count {
  background: var(--primary-surface);
  color: var(--primary-hover);
  border: 1px solid var(--primary-border);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 1.05rem;
}

/* --------------------------------------------------------------------------
   Preview list
   -------------------------------------------------------------------------- */
.preview {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.preview h3 {
  margin-bottom: 14px;
  font-size: 0.885rem;
  font-weight: 750;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.preview ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 6px;
}

.preview li {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  box-shadow: var(--shadow-sm);
  transition: all 160ms var(--ease-spring);
}

.preview li:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.event-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.event-title {
  font-weight: 650;
  font-size: 0.92rem;
  color: var(--text-main);
}

.event-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.event-badge {
  font-size: 0.72rem;
  font-weight: 750;
  padding: 5px 10px;
  border-radius: 8px;
  white-space: nowrap;
  /* neutral default: unknown/missing slug never renders unstyled */
  background: var(--bg-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

.event-badge.cat-plastik { background: var(--cat-plastik-bg); color: var(--cat-plastik-fg); border: 1px solid var(--cat-plastik-border); }
.event-badge.cat-papier { background: var(--cat-papier-bg); color: var(--cat-papier-fg); border: 1px solid var(--cat-papier-border); }
.event-badge.cat-szklo { background: var(--cat-szklo-bg); color: var(--cat-szklo-fg); border: 1px solid var(--cat-szklo-border); }
.event-badge.cat-bio { background: var(--cat-bio-bg); color: var(--cat-bio-fg); border: 1px solid var(--cat-bio-border); }
.event-badge.cat-zmieszane { background: var(--cat-zmieszane-bg); color: var(--cat-zmieszane-fg); border: 1px solid var(--cat-zmieszane-border); }
.event-badge.cat-gabaryty { background: var(--cat-gabaryty-bg); color: var(--cat-gabaryty-fg); border: 1px solid var(--cat-gabaryty-border); }
.event-badge.cat-zielone { background: var(--cat-zielone-bg); color: var(--cat-zielone-fg); border: 1px solid var(--cat-zielone-border); }
.event-badge.cat-resztkowe { background: var(--cat-resztkowe-bg); color: var(--cat-resztkowe-fg); border: 1px solid var(--cat-resztkowe-border); }

/* Next upcoming pickup (all events on the earliest date >= today) */
.preview li.next-pickup {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary-border), var(--shadow-md);
  background: var(--primary-surface);
}

.relative-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--primary-hover);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
footer {
  margin-top: 8px;
  padding: 20px 24px;
  background: var(--bg-card-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.65;
  box-shadow: var(--shadow-sm);
}

footer code {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 2.5px 7px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--primary-hover);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Footer FAQ (import .ics) — natywne details/summary, zero JS
   -------------------------------------------------------------------------- */
.ics-faq {
  margin-top: 14px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.ics-faq > summary,
.ics-faq-body summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  list-style: none;
}

.ics-faq > summary::-webkit-details-marker,
.ics-faq-body summary::-webkit-details-marker {
  display: none;
}

.ics-faq > summary {
  padding: 12px 14px;
  font-weight: 700;
  color: var(--text-muted);
  transition: color 150ms ease;
}

.ics-faq > summary:hover {
  color: var(--text-main);
}

/* Focus: ring wewnątrz kontenera (outline ze -2px nie ucina się na radius) */
.ics-faq > summary:focus-visible,
.ics-faq-body summary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}

.faq-chevron {
  flex-shrink: 0;
  transition: transform 160ms var(--ease-spring);
}

details[open] > summary .faq-chevron {
  transform: rotate(180deg);
}

.ics-faq-body {
  padding: 0 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ics-faq-body details + details {
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
}

.ics-faq-body summary {
  font-weight: 650;
  color: var(--text-main);
  transition: color 150ms ease;
}

.ics-faq-body summary:hover {
  color: var(--primary-hover);
}

.ics-faq-body ol {
  margin: 6px 0 0;
  padding-left: 22px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

@keyframes faqReveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Fade-in treści przy otwarciu; reduced-motion wyłącza globalna reguła */
.ics-faq[open] .ics-faq-body {
  animation: faqReveal 0.25s var(--ease-spring);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  .date-inputs-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .form-row {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* --------------------------------------------------------------------------
   Dark mode (system preference; no manual toggle by design)
   -------------------------------------------------------------------------- */
@media (prefers-color-scheme: dark) {
  html {
    color-scheme: dark;
  }

  :root {
    /* Surfaces (hex fallbacks first) */
    --bg-page: #171a1f;
    --bg-page: oklch(0.16 0.015 240);
    --bg-card: #1e2228;
    --bg-card: oklch(0.21 0.018 240);
    --bg-card-glass: rgba(30, 34, 40, 0.92);
    --bg-card-glass: oklch(0.21 0.018 240 / 0.9);
    --bg-input: #23282f;
    --bg-input: oklch(0.24 0.02 240);
    --bg-input-hover: #282e36;
    --bg-input-hover: oklch(0.27 0.02 240);
    --bg-subtle: #1a1e24;
    --bg-subtle: oklch(0.18 0.015 240);

    /* Primary (lightened for contrast on dark) */
    --primary: #4ec97e;
    --primary: oklch(0.72 0.16 145);
    --primary-hover: #6adb94;
    --primary-hover: oklch(0.78 0.15 145);
    --primary-active: #3db76c;
    --primary-active: oklch(0.66 0.15 145);
    --primary-surface: #1d3a29;
    --primary-surface: oklch(0.30 0.05 145);
    --primary-border: #2c5c3d;
    --primary-border: oklch(0.42 0.09 145);
    --primary-glow: rgba(78, 201, 126, 0.2);
    --primary-glow: oklch(0.72 0.16 145 / 0.2);
    --primary-gradient-end: #3fbd6f;
    --primary-gradient-end: oklch(0.62 0.15 150);
    --primary-hover-gradient-end: #52cc81;
    --primary-hover-gradient-end: oklch(0.68 0.14 150);
    --card-inset-ring: rgba(255, 255, 255, 0.05);
    --card-inset-ring: oklch(1 0 0 / 0.05);

    /* Text & borders */
    --text-main: #eff1f4;
    --text-main: oklch(0.95 0.01 240);
    --text-muted: #b3bac4;
    --text-muted: oklch(0.72 0.02 240);
    --text-subtle: #838b96;
    --text-subtle: oklch(0.55 0.02 240);
    --border-subtle: #333a44;
    --border-subtle: oklch(0.32 0.02 240);
    --border-strong: #474f5b;
    --border-strong: oklch(0.45 0.03 240);

    /* Status */
    --error-bg: #3a2422;
    --error-bg: oklch(0.30 0.06 25);
    --error-border: #63332c;
    --error-border: oklch(0.45 0.10 25);
    --error-fg: #e58a80;
    --error-fg: oklch(0.75 0.15 25);

    --success-bg: #213728;
    --success-bg: oklch(0.28 0.05 145);
    --success-border: #33603f;
    --success-border: oklch(0.42 0.09 145);
    --success-fg: #7fd6a1;
    --success-fg: oklch(0.80 0.13 145);

    /* Categories: dark desaturated bg, bright fg, same hue as light */
    --cat-plastik-bg: #403a24;
    --cat-plastik-bg: oklch(0.30 0.055 95);
    --cat-plastik-border: #635427;
    --cat-plastik-border: oklch(0.45 0.10 95);
    --cat-plastik-fg: #e3c876;
    --cat-plastik-fg: oklch(0.85 0.10 95);

    --cat-papier-bg: #26324a;
    --cat-papier-bg: oklch(0.30 0.055 235);
    --cat-papier-border: #3a507c;
    --cat-papier-border: oklch(0.45 0.10 235);
    --cat-papier-fg: #a7bde8;
    --cat-papier-fg: oklch(0.85 0.10 235);

    --cat-szklo-bg: #23402e;
    --cat-szklo-bg: oklch(0.30 0.055 155);
    --cat-szklo-border: #356044;
    --cat-szklo-border: oklch(0.45 0.10 155);
    --cat-szklo-fg: #96d8b0;
    --cat-szklo-fg: oklch(0.85 0.10 155);

    --cat-bio-bg: #40331f;
    --cat-bio-bg: oklch(0.30 0.055 60);
    --cat-bio-border: #654f2c;
    --cat-bio-border: oklch(0.45 0.10 60);
    --cat-bio-fg: #e0c489;
    --cat-bio-fg: oklch(0.85 0.10 60);

    --cat-zmieszane-bg: #292d33;
    --cat-zmieszane-bg: oklch(0.30 0.02 240);
    --cat-zmieszane-border: #434a54;
    --cat-zmieszane-border: oklch(0.45 0.03 240);
    --cat-zmieszane-fg: #d4d9df;
    --cat-zmieszane-fg: oklch(0.85 0.02 240);

    --cat-gabaryty-bg: #372a42;
    --cat-gabaryty-bg: oklch(0.30 0.055 310);
    --cat-gabaryty-border: #543f66;
    --cat-gabaryty-border: oklch(0.45 0.10 310);
    --cat-gabaryty-fg: #d9b2ee;
    --cat-gabaryty-fg: oklch(0.85 0.10 310);

    --cat-zielone-bg: #2a3f20;
    --cat-zielone-bg: oklch(0.30 0.055 120);
    --cat-zielone-border: #406030;
    --cat-zielone-border: oklch(0.45 0.10 120);
    --cat-zielone-fg: #b5e18e;
    --cat-zielone-fg: oklch(0.85 0.10 120);

    --cat-resztkowe-bg: #38332a;
    --cat-resztkowe-bg: oklch(0.30 0.03 70);
    --cat-resztkowe-border: #5a5142;
    --cat-resztkowe-border: oklch(0.45 0.05 70);
    --cat-resztkowe-fg: #ddd3bf;
    --cat-resztkowe-fg: oklch(0.85 0.06 70);

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.25);
    --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.3), 0 1px 2px oklch(0 0 0 / 0.25);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35), 0 1px 3px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 16px oklch(0 0 0 / 0.35), 0 1px 3px oklch(0 0 0 / 0.25);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 16px 40px oklch(0 0 0 / 0.4), 0 4px 12px oklch(0 0 0 / 0.3);
  }

  /* Button text: dark on the lightened green (white would fail contrast) */
  button {
    color: #0c1f14;
  }

  /* Ambient background */
  body {
    background-image:
      radial-gradient(circle at 10% 10%, rgba(78, 201, 126, 0.08) 0px, transparent 45%),
      radial-gradient(circle at 90% 20%, rgba(90, 130, 210, 0.06) 0px, transparent 45%),
      radial-gradient(circle at 50% 90%, rgba(200, 160, 80, 0.05) 0px, transparent 50%);
  }

  /* Select arrow: light stroke for dark backgrounds */
  select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* --------------------------------------------------------------------------
   backdrop-filter (progressive enhancement; glass bg is ~90% opaque anyway)
   -------------------------------------------------------------------------- */
@supports ((backdrop-filter: blur(16px)) or (-webkit-backdrop-filter: blur(16px))) {
  form#form,
  #loading,
  .success,
  footer {
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
  }
}