/* ============================================================
   nápady.cz — Main Stylesheet
   Design: Modern editorial — clean, spacious, refined.
   Palette: Pure white, deep charcoal, vibrant violet
   Typography: Fraunces (serif headings) + Plus Jakarta Sans (body)
   ============================================================ */

/* ── Custom Properties ─────────────────────────────────────── */
:root {
  --bg:           #FFFFFF;
  --bg-surface:   #F7F5FB;
  --bg-muted:     #F0EDF8;
  --bg-card:      #FFFFFF;
  --bg-modal:     #FFFFFF;
  --border:       #E6E2F0;
  --border-light: #EDE9F5;
  --border-strong: #D4CEE8;

  --text:         #0F0E17;
  --text-muted:   #6B6680;
  --text-light:   #A49DB8;

  --accent:       #7C3AED;
  --accent-hover: #6D28D9;
  --accent-dark:  #5B21B6;
  --accent-light: #F3EEFF;
  --accent-mid:   #DDD6FE;

  --like:         #E5484D;
  --like-hover:   #CE2C31;
  --like-bg:      #FFF1F2;
  --like-border:  #FFC9CA;

  --chain:        #16A34A;
  --chain-hover:  #15803D;
  --chain-bg:     #F0FDF4;
  --chain-border: #A7F3D0;

  --shadow-xs:    0 1px 2px rgba(15,14,23,.04);
  --shadow-sm:    0 1px 3px rgba(15,14,23,.06), 0 1px 2px rgba(15,14,23,.04);
  --shadow-md:    0 4px 16px rgba(15,14,23,.08), 0 2px 6px rgba(15,14,23,.04);
  --shadow-lg:    0 20px 60px rgba(15,14,23,.14), 0 8px 24px rgba(15,14,23,.06);
  --shadow-accent: 0 4px 16px rgba(124,58,237,.2);

  --radius-sm:    8px;
  --radius:       12px;
  --radius-lg:    16px;
  --radius-xl:    24px;
  --radius-full:  9999px;

  --font-body:    'Plus Jakarta Sans', system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-serif:   'Fraunces', Georgia, "Times New Roman", serif;

  --header-h:     64px;
  --col-max:      1240px;

  --transition:   0.18s ease;
}

/* ── SVG Icon Base ─────────────────────────────────────────── */
.icon-svg {
  width: 1em;
  height: 1em;
  vertical-align: middle;
  flex-shrink: 0;
  display: inline-block;
}

/* Button and prominent contexts — keep icons at a legible fixed size */
.like-btn .icon-svg,
.chain-btn .icon-svg,
.search-btn .icon-svg,
.hero-eyebrow .icon-svg {
  width: 1rem;
  height: 1rem;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

img { max-width: 100%; }

/* ── Typography ────────────────────────────────────────────── */
h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

/* ── Layout Utilities ──────────────────────────────────────── */
.container {
  max-width: var(--col-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Header ────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-h);
}

.header-inner {
  max-width: var(--col-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-logo {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.03em;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.site-logo:hover { color: var(--accent); text-decoration: none; }

.logo-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: var(--radius-full);
  margin-left: 1px;
  margin-bottom: 2px;
  vertical-align: middle;
}

.header-nav {
  display: flex;
  gap: 0.25rem;
  flex: 1;
}

.nav-link {
  padding: 0.38rem 0.9rem;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}
.nav-link:hover {
  background: var(--accent-light);
  color: var(--accent);
  text-decoration: none;
}

.header-actions { margin-left: auto; flex-shrink: 0; }

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.52rem 1.25rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: 0.875rem;
  font-family: var(--font-body);
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform 0.12s ease;
  line-height: 1.4;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 20px rgba(124,58,237,.28);
  transform: translateY(-1px);
  text-decoration: none;
  color: #fff;
}
.btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-accent); }

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover {
  background: var(--bg-surface);
  color: var(--text);
  border-color: var(--border-strong);
  text-decoration: none;
}
.share-btn.copied {
  background: var(--chain-bg);
  color: var(--chain);
  border-color: var(--chain-border);
}

.btn-icon { font-size: 1rem; line-height: 1; font-weight: 400; }

/* ── Main ──────────────────────────────────────────────────── */
main {
  flex: 1;
  padding: 2rem 1.5rem 5rem;
  max-width: var(--col-max);
  margin: 0 auto;
  width: 100%;
}

/* ── Hero Section ──────────────────────────────────────────── */
.page-hero {
  padding: 1.5rem 0 2.5rem;
  max-width: 680px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 0.85rem;
}

.hero-title-accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
  font-weight: 400;
  max-width: 520px;
}

/* ── Page Controls ─────────────────────────────────────────── */
.page-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

/* ── Search ────────────────────────────────────────────────── */
.search-bar { flex: 1; min-width: 200px; }

.search-form {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.28rem 0.28rem 0.28rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}
.search-form:focus-within {
  background: var(--bg-card);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124,58,237,.1);
}

.search-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 0.9rem;
  color: var(--text);
  font-family: var(--font-body);
  padding: 0.3rem 0;
  outline: none;
  min-width: 0;
}
.search-input::placeholder { color: var(--text-light); }

.search-btn, .search-clear {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  padding: 0.32rem 0.55rem;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  text-decoration: none;
  display: flex;
  align-items: center;
  transition: color var(--transition), background var(--transition);
}
.search-btn:hover, .search-clear:hover {
  color: var(--text);
  background: var(--bg-muted);
}
.search-clear { font-size: 1.1rem; }

/* ── Sort Tabs ─────────────────────────────────────────────── */
.sort-tabs {
  display: flex;
  gap: 0.15rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.22rem;
}

.sort-tab {
  padding: 0.35rem 1rem;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  letter-spacing: 0.005em;
}
.sort-tab:hover { background: var(--bg-card); color: var(--text); text-decoration: none; }
.sort-tab.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 1px 4px rgba(124,58,237,.3);
}

.search-result-info {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.clear-search { color: var(--accent); font-weight: 500; }

/* ── Masonry Grid ──────────────────────────────────────────── */
.masonry-grid {
  columns: 3 280px;
  column-gap: 1.25rem;
}

/* ── Idea Card ─────────────────────────────────────────────── */
.idea-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  break-inside: avoid;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.22s ease, transform 0.18s ease, border-color 0.18s ease;
  overflow: hidden;
  position: relative;
}
.idea-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}
.idea-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border);
  transform: translateY(-2px);
}
.idea-card:hover::before { transform: scaleX(1); }

.card-link {
  display: block;
  padding: 1.25rem 1.35rem 0.9rem;
  text-decoration: none;
  color: var(--text);
  flex: 1;
}
.card-link:hover { text-decoration: none; }

.card-content {
  font-size: 0.975rem;
  line-height: 1.75;
  color: var(--text);
  word-break: break-word;
  hyphens: auto;
}

.card-footer {
  padding: 0.7rem 1.35rem 1rem;
  border-top: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.meta-dot {
  width: 3px;
  height: 3px;
  background: var(--text-light);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.card-author {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}

.card-date {
  font-size: 0.78rem;
  color: var(--text-light);
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.card-chains {
  font-size: 0.78rem;
  color: var(--chain);
  font-weight: 500;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.2rem;
  flex: 1;
  min-width: 0;
}
.card-chains:hover { text-decoration: underline; color: var(--chain-hover); }

/* ── Like Button ───────────────────────────────────────────── */
.like-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.22rem 0.7rem;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-weight: 500;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.like-btn:hover {
  background: var(--like-bg);
  color: var(--like);
  border-color: var(--like-border);
}
.like-btn.liked {
  background: var(--like-bg);
  color: var(--like);
  border-color: var(--like-border);
  font-weight: 600;
}
.like-btn.liked:hover {
  background: #ffe4e6;
  color: #9f1239;
  border-color: #fda4af;
  opacity: 0.8;
}
.like-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.like-btn-large {
  padding: 0.42rem 1.1rem;
  font-size: 0.925rem;
}

.like-icon {
  display: inline-flex;
  align-items: center;
}
.like-icon .icon-svg { transition: fill var(--transition); }
.like-btn:hover .like-icon .icon-svg,
.like-btn.liked .like-icon .icon-svg { fill: currentColor; }

/* ── Chain Button ──────────────────────────────────────────── */
.chain-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.22rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--chain);
  font-family: var(--font-body);
  text-decoration: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.chain-btn:hover {
  background: var(--chain-bg);
  border-color: var(--chain-border);
  color: var(--chain-hover);
  text-decoration: none;
}

/* ── Empty State ───────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 6rem 2rem;
}
.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 1.25rem;
  opacity: 0.35;
  display: flex;
  justify-content: center;
}
.empty-state-icon .icon-svg {
  width: 3rem;
  height: 3rem;
}
.empty-text {
  color: var(--text-muted);
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: 2rem;
  line-height: 1.6;
  font-style: italic;
}

/* ── Pagination ────────────────────────────────────────────── */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  gap: 1rem;
}

/* ── Idea Detail Page ──────────────────────────────────────── */
.page-idea { max-width: 740px; margin: 0 auto; }
.page-idea-inner { display: flex; flex-direction: column; gap: 2rem; }

/* ── New / Chain Idea Page (no-JS fallback for the modal) ─────── */
.page-new-idea { max-width: 560px; margin: 0 auto; }
.page-new-idea-inner { display: flex; flex-direction: column; gap: 1.25rem; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.38rem 0;
  transition: color var(--transition);
}
.back-link:hover { color: var(--accent); text-decoration: none; }

/* ── Ancestor Trail ────────────────────────────────────────── */
.ancestor-trail {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
}

.ancestor-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-light);
  margin-bottom: 1rem;
  font-weight: 700;
}

.ancestor-step { margin-bottom: 0.5rem; }
.ancestor-child { padding-left: 1.25rem; }

.ancestor-link {
  display: block;
  text-decoration: none;
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  border-left: 3px solid var(--border);
  background: var(--bg-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.ancestor-link:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-xs);
  text-decoration: none;
}

.ancestor-content {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.55;
}

.ancestor-meta {
  font-size: 0.76rem;
  color: var(--text-light);
  display: block;
  margin-top: 0.3rem;
}

.ancestor-arrow {
  display: block;
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  margin: 0.3rem 0;
}

.ancestor-arrow-current {
  color: var(--accent);
}

/* ── Idea Detail Card ──────────────────────────────────────── */
.idea-detail {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem 2.25rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.idea-detail::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.idea-detail-content {
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1.8;
  color: var(--text);
  font-family: var(--font-serif);
  word-break: break-word;
  hyphens: auto;
  margin-bottom: 1.5rem;
}

.idea-detail-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-light);
}

.idea-detail-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.idea-detail-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ── Chains Section ────────────────────────────────────────── */
.chains-section { display: flex; flex-direction: column; gap: 1rem; }

.section-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.chains-count {
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.76rem;
  padding: 0.14rem 0.6rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-weight: 700;
}

.chains-list { display: flex; flex-direction: column; gap: 0.85rem; }

.chain-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border-left: 3px solid var(--accent-mid);
  transition: box-shadow 0.18s ease, border-left-color 0.18s ease, transform 0.15s ease;
}
.chain-card:hover {
  box-shadow: var(--shadow-sm);
  border-left-color: var(--accent);
  transform: translateX(2px);
}

.chain-card-link {
  display: block;
  padding: 1.1rem 1.3rem 0.65rem;
  text-decoration: none;
  color: var(--text);
}
.chain-card-link:hover { text-decoration: none; }

.chain-content {
  font-size: 0.975rem;
  line-height: 1.7;
  color: var(--text);
  word-break: break-word;
  hyphens: auto;
}

.chain-footer {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 1.3rem 0.9rem;
  flex-wrap: wrap;
}

.chains-empty-text {
  color: var(--text-muted);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  padding: 1.25rem 0 0.75rem;
  font-style: italic;
}

/* ── Modal ─────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15,14,23,0.55);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2.5rem 1rem;
  z-index: 200;
  overflow-y: auto;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.modal-backdrop[hidden] { display: none; }

.modal, .form-card {
  background: var(--bg-modal);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  overflow: hidden;
}
.modal { animation: modalIn 0.24s cubic-bezier(0.16, 1, 0.3, 1); }

@keyframes modalIn {
  from { opacity: 0; transform: translateY(-20px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header, .form-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 1.75rem 1.25rem;
  border-bottom: 1px solid var(--border-light);
}

.modal-title, .form-card-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: -0.02em;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.35rem;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
  padding: 0.25rem;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: color var(--transition), background var(--transition);
}
.modal-close:hover { color: var(--text); background: var(--bg-surface); }

/* ── Form ──────────────────────────────────────────────────── */
.idea-form { padding: 1.75rem; display: flex; flex-direction: column; gap: 1.25rem; }

.form-parent-preview {
  background: var(--accent-light);
  border: 1px solid var(--accent-mid);
  border-radius: var(--radius);
  padding: 0.9rem 1.25rem;
}
.form-parent-preview[hidden] { display: none; }

.form-parent-label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.35rem;
  font-weight: 700;
}

.form-parent-text {
  font-size: 0.875rem;
  color: var(--text);
  line-height: 1.55;
  word-break: break-word;
}

.form-parent-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--accent-mid);
}

.form-group { display: flex; flex-direction: column; gap: 0.45rem; }

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}

.form-optional { color: var(--text-light); font-weight: 400; font-size: 0.82em; }

.form-textarea, .form-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-surface);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  resize: vertical;
  line-height: 1.6;
}
.form-textarea:focus, .form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124,58,237,.12);
  background: var(--bg-card);
}
.form-textarea { min-height: 140px; }

.form-char-count {
  font-size: 0.78rem;
  color: var(--text-light);
  text-align: right;
}
.form-char-count.warn { color: #B25800; }
.form-char-count.error { color: var(--like); }

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding-top: 0.25rem;
}

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.82rem;
  color: var(--text-light);
  letter-spacing: 0.01em;
}

/* ── Responsive ────────────────────────────────────────────── */

/* Tablet */
@media (max-width: 768px) {
  :root { --header-h: 58px; }

  .header-nav { display: none; }

  .masonry-grid { columns: 2 240px; }

  .page-controls { flex-direction: column; align-items: stretch; }
  .search-bar { min-width: 0; }
  .sort-tabs { align-self: flex-start; }

  main { padding: 1.5rem 1.1rem 3.5rem; }

  .hero-title { font-size: 2.2rem; }
  .page-hero { padding: 1rem 0 2rem; }

  .idea-detail { padding: 1.5rem 1.75rem; }
}

/* Mobile */
@media (max-width: 480px) {
  .masonry-grid { columns: 1; }

  .site-logo { font-size: 1.3rem; }

  .btn-text { display: inline; }

  .idea-detail-content { font-size: 1.15rem; }
  .idea-detail { padding: 1.25rem 1.35rem; border-radius: var(--radius-lg); }
  .idea-detail::before { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }

  .modal { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
  .modal-backdrop {
    align-items: flex-end;
    padding: 0;
  }
  .idea-form { padding: 1.35rem 1.25rem; }
  .modal-header { padding: 1.25rem 1.5rem 1rem; }

  .card-actions { flex-wrap: wrap; }

  .idea-detail-footer { flex-direction: column; align-items: flex-start; }

  .hero-title { font-size: 1.75rem; }
  .hero-sub { font-size: 0.95rem; }
  .page-hero { padding: 0.75rem 0 1.5rem; }
}

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

/* ── Likes animation ───────────────────────────────────────── */

/* Adding a heart – bouncy spring with a little wobble */
@keyframes likePopIn {
  0%   { transform: scale(1)    rotate(0deg); }
  15%  { transform: scale(1.75) rotate(-18deg); }
  35%  { transform: scale(1.1)  rotate(10deg); }
  50%  { transform: scale(1.4)  rotate(-7deg); }
  68%  { transform: scale(0.93) rotate(3deg); }
  82%  { transform: scale(1.06) rotate(-1deg); }
  100% { transform: scale(1)    rotate(0deg); }
}

/* Removing a heart – quick spin-shrink then settle */
@keyframes likePopOut {
  0%   { transform: scale(1)    rotate(0deg);   opacity: 1; }
  20%  { transform: scale(1.25) rotate(20deg);  opacity: 1; }
  55%  { transform: scale(0.2)  rotate(-30deg); opacity: 0.5; }
  78%  { transform: scale(1.1)  rotate(4deg);   opacity: 1; }
  100% { transform: scale(1)    rotate(0deg);   opacity: 1; }
}

/* Floating heart particle that drifts upward on like */
@keyframes floatHeart {
  0%   { transform: translateY(0)     scale(1);   opacity: 1; }
  60%  { transform: translateY(-30px) scale(1.2); opacity: 0.8; }
  100% { transform: translateY(-60px) scale(0.4); opacity: 0; }
}

.like-particle {
  position: fixed;
  pointer-events: none;
  color: var(--like);
  font-size: 1rem;
  z-index: 9999;
  animation: floatHeart 0.65s ease-out forwards;
  user-select: none;
  display: inline-flex;
  align-items: center;
}
.like-particle svg {
  width: 1rem;
  height: 1rem;
}

.like-btn.pop .like-icon {
  animation: likePopIn 0.52s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

.like-btn.pop-unlike .like-icon {
  animation: likePopOut 0.42s ease-in-out both;
}