:root {
  --bg: #05050b;
  --surface: rgba(16, 18, 34, 0.7);
  --primary: #7cf9ff;
  --accent: #8b5cf6;
  --text: #e6ecff;
  --muted: #a0a7c5;
  --border: rgba(124, 249, 255, 0.2);
  --glow: 0 0 30px rgba(124, 249, 255, 0.4);
  --bg-orb-1: #1b1f3a;
  --bg-orb-2: #311a52;
  --ambient-1: rgba(124, 249, 255, 0.08);
  --ambient-2: rgba(139, 92, 246, 0.1);
  --avatar-border: rgba(124, 249, 255, 0.25);
  --hover-glow: rgba(124, 249, 255, 0.2);
  --panel-border-soft: rgba(124, 249, 255, 0.1);
  --panel-accent-soft: rgba(124, 249, 255, 0.08);
  --panel-bg-strong: rgba(15, 18, 32, 0.8);
  --stack-bg: rgba(124, 249, 255, 0.1);
  --field-bg: rgba(7, 8, 18, 0.7);
  --text-strong: rgba(230, 236, 255, 0.95);
  --text-dim-strong: rgba(230, 236, 255, 0.9);
  --blockquote-border: rgba(124, 249, 255, 0.35);
  --blockquote-text: rgba(230, 236, 255, 0.85);
  --blockquote-bg: rgba(7, 8, 18, 0.35);
  --code-bg: rgba(124, 249, 255, 0.08);
  --code-border: rgba(124, 249, 255, 0.18);
  --pre-bg: rgba(7, 8, 18, 0.75);
  --image-border: rgba(124, 249, 255, 0.12);
  --toc-bg: rgba(16, 18, 34, 0.55);
  --modal-border: rgba(124, 249, 255, 0.16);
  --modal-bg: rgba(10, 12, 24, 0.92);
  --modal-divider: rgba(124, 249, 255, 0.12);
  --modal-close-border: rgba(124, 249, 255, 0.14);
  color-scheme: dark;
}

:root[data-theme='day'] {
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.9);
  --primary: #0f7ea8;
  --accent: #f97316;
  --text: #142334;
  --muted: #56667b;
  --border: rgba(15, 126, 168, 0.24);
  --glow: 0 0 24px rgba(15, 126, 168, 0.25);
  --bg-orb-1: #dff2ff;
  --bg-orb-2: #ffe6cc;
  --ambient-1: rgba(15, 126, 168, 0.08);
  --ambient-2: rgba(249, 115, 22, 0.08);
  --avatar-border: rgba(15, 126, 168, 0.28);
  --hover-glow: rgba(15, 126, 168, 0.2);
  --panel-border-soft: rgba(15, 126, 168, 0.16);
  --panel-accent-soft: rgba(15, 126, 168, 0.1);
  --panel-bg-strong: rgba(255, 255, 255, 0.92);
  --stack-bg: rgba(15, 126, 168, 0.1);
  --field-bg: rgba(245, 248, 253, 0.95);
  --text-strong: rgba(20, 35, 52, 0.96);
  --text-dim-strong: rgba(20, 35, 52, 0.88);
  --blockquote-border: rgba(15, 126, 168, 0.36);
  --blockquote-text: rgba(20, 35, 52, 0.9);
  --blockquote-bg: rgba(15, 126, 168, 0.08);
  --code-bg: rgba(15, 126, 168, 0.08);
  --code-border: rgba(15, 126, 168, 0.24);
  --pre-bg: rgba(245, 248, 253, 0.96);
  --image-border: rgba(15, 126, 168, 0.2);
  --toc-bg: rgba(255, 255, 255, 0.92);
  --modal-border: rgba(15, 126, 168, 0.22);
  --modal-bg: rgba(255, 255, 255, 0.98);
  --modal-divider: rgba(15, 126, 168, 0.16);
  --modal-close-border: rgba(15, 126, 168, 0.24);
  color-scheme: light;
}

:root[data-theme='night'] {
  --bg: #070a12;
  --surface: rgba(16, 20, 31, 0.78);
  --primary: #8ec5ff;
  --accent: #60a5fa;
  --text: #e7ecf8;
  --muted: #97a4bf;
  --border: rgba(142, 197, 255, 0.23);
  --glow: 0 0 28px rgba(96, 165, 250, 0.3);
  --bg-orb-1: #11192b;
  --bg-orb-2: #12253a;
  --ambient-1: rgba(142, 197, 255, 0.09);
  --ambient-2: rgba(96, 165, 250, 0.08);
  --avatar-border: rgba(142, 197, 255, 0.3);
  --hover-glow: rgba(96, 165, 250, 0.2);
  --panel-border-soft: rgba(142, 197, 255, 0.12);
  --panel-accent-soft: rgba(142, 197, 255, 0.09);
  --panel-bg-strong: rgba(16, 20, 31, 0.86);
  --stack-bg: rgba(142, 197, 255, 0.1);
  --field-bg: rgba(12, 15, 26, 0.82);
  --text-strong: rgba(231, 236, 248, 0.96);
  --text-dim-strong: rgba(231, 236, 248, 0.88);
  --blockquote-border: rgba(142, 197, 255, 0.35);
  --blockquote-text: rgba(231, 236, 248, 0.88);
  --blockquote-bg: rgba(12, 15, 26, 0.55);
  --code-bg: rgba(142, 197, 255, 0.12);
  --code-border: rgba(142, 197, 255, 0.24);
  --pre-bg: rgba(12, 15, 26, 0.82);
  --image-border: rgba(142, 197, 255, 0.2);
  --toc-bg: rgba(16, 20, 31, 0.62);
  --modal-border: rgba(142, 197, 255, 0.2);
  --modal-bg: rgba(10, 14, 24, 0.94);
  --modal-divider: rgba(142, 197, 255, 0.14);
  --modal-close-border: rgba(142, 197, 255, 0.2);
  color-scheme: dark;
}

:root[data-theme='cny'] {
  --bg: #2a0007;
  --surface: rgba(64, 7, 14, 0.76);
  --primary: #ffd56a;
  --accent: #ff8a3d;
  --text: #fff4df;
  --muted: #f5cc98;
  --border: rgba(255, 213, 106, 0.35);
  --glow: 0 0 34px rgba(255, 200, 92, 0.36);
  --bg-orb-1: #5a0715;
  --bg-orb-2: #7a220e;
  --ambient-1: rgba(255, 213, 106, 0.14);
  --ambient-2: rgba(255, 122, 69, 0.12);
  --avatar-border: rgba(255, 213, 106, 0.4);
  --hover-glow: rgba(255, 200, 92, 0.3);
  --panel-border-soft: rgba(255, 213, 106, 0.22);
  --panel-accent-soft: rgba(255, 213, 106, 0.14);
  --panel-bg-strong: rgba(79, 11, 19, 0.88);
  --stack-bg: rgba(255, 213, 106, 0.16);
  --field-bg: rgba(44, 6, 12, 0.88);
  --text-strong: rgba(255, 244, 223, 0.98);
  --text-dim-strong: rgba(255, 236, 200, 0.92);
  --blockquote-border: rgba(255, 213, 106, 0.45);
  --blockquote-text: rgba(255, 233, 191, 0.92);
  --blockquote-bg: rgba(83, 12, 20, 0.68);
  --code-bg: rgba(255, 213, 106, 0.16);
  --code-border: rgba(255, 213, 106, 0.34);
  --pre-bg: rgba(44, 6, 12, 0.9);
  --image-border: rgba(255, 213, 106, 0.28);
  --toc-bg: rgba(72, 10, 18, 0.8);
  --modal-border: rgba(255, 213, 106, 0.32);
  --modal-bg: rgba(51, 7, 14, 0.94);
  --modal-divider: rgba(255, 213, 106, 0.24);
  --modal-close-border: rgba(255, 213, 106, 0.3);
  color-scheme: dark;
}

:root[data-theme='spring'] {
  --bg: #f8faf6;
  --surface: rgba(255, 255, 255, 0.88);
  --primary: #7cb342;
  --accent: #ffb7c5;
  --text: #2d3436;
  --muted: #6b7280;
  --border: rgba(124, 179, 66, 0.28);
  --glow: 0 0 28px rgba(124, 179, 66, 0.25);
  --bg-orb-1: #e8f5d9;
  --bg-orb-2: #ffe6eb;
  --ambient-1: rgba(124, 179, 66, 0.1);
  --ambient-2: rgba(255, 183, 197, 0.1);
  --avatar-border: rgba(124, 179, 66, 0.35);
  --hover-glow: rgba(124, 179, 66, 0.18);
  --panel-border-soft: rgba(124, 179, 66, 0.18);
  --panel-accent-soft: rgba(124, 179, 66, 0.1);
  --panel-bg-strong: rgba(255, 255, 255, 0.94);
  --stack-bg: rgba(124, 179, 66, 0.1);
  --field-bg: rgba(248, 250, 246, 0.96);
  --text-strong: rgba(45, 52, 54, 0.96);
  --text-dim-strong: rgba(45, 52, 54, 0.88);
  --blockquote-border: rgba(124, 179, 66, 0.4);
  --blockquote-text: rgba(45, 52, 54, 0.9);
  --blockquote-bg: rgba(124, 179, 66, 0.08);
  --code-bg: rgba(124, 179, 66, 0.1);
  --code-border: rgba(124, 179, 66, 0.25);
  --pre-bg: rgba(248, 250, 246, 0.96);
  --image-border: rgba(124, 179, 66, 0.22);
  --toc-bg: rgba(255, 255, 255, 0.9);
  --modal-border: rgba(124, 179, 66, 0.25);
  --modal-bg: rgba(255, 255, 255, 0.96);
  --modal-divider: rgba(124, 179, 66, 0.18);
  --modal-close-border: rgba(124, 179, 66, 0.25);
  color-scheme: light;
}

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

body {
  font-family: 'Space Grotesk', sans-serif;
  background: radial-gradient(circle at 20% 20%, var(--bg-orb-1), transparent 55%),
    radial-gradient(circle at 80% 10%, var(--bg-orb-2), transparent 45%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

.ambient-glow {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, var(--ambient-1), transparent 60%),
    radial-gradient(circle at 70% 70%, var(--ambient-2), transparent 50%);
  pointer-events: none;
  z-index: -1;
}

.site-header {
  padding: 32px 8vw 80px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.logo {
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 20px;
  font-size: 0.95rem;
}

.theme-picker {
  display: inline-flex;
  align-items: center;
  gap: 0;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 8px;
  background: var(--surface);
  font-size: 0.85rem;
}

.theme-picker select {
  border: none;
  background: transparent;
  color: var(--text);
  font: inherit;
  line-height: 1;
  min-width: 72px;
  cursor: pointer;
}

.theme-picker select:focus {
  outline: none;
}

.nav-links a,
.site-footer a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-links a:hover,
.site-footer a:hover {
  color: var(--primary);
}

.cta {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  border: none;
  color: #04040d;
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--glow);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  margin-top: 70px;
  align-items: center;
}

.eyebrow {
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 4px;
  font-size: 0.75rem;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.1;
}

.hero h1 span {
  color: var(--primary);
}

.lead {
  color: var(--muted);
  margin-top: 20px;
  max-width: 520px;
}

.avatar {
  width: 110px;
  height: 110px;
  border-radius: 999px;
  object-fit: cover;
  margin-top: 18px;
  border: 1px solid var(--avatar-border);
  box-shadow: 0 18px 40px rgba(7, 10, 30, 0.55);
}

/* Homepage hero: avatar left + compact intro */
.hero-intro {
  display: flex;
  gap: 18px;
  align-items: center;
}

.hero-avatar {
  margin-top: 0;
  width: 96px;
  height: 96px;
  flex-shrink: 0;
}

.hero-title {
  margin: 0;
}

.hero-subtitle {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  letter-spacing: 0.2px;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

@media (max-width: 560px) {
  .hero-intro {
    align-items: flex-start;
    gap: 14px;
  }
  .hero-avatar {
    width: 82px;
    height: 82px;
  }
  .hero-subtitle {
    font-size: 0.98rem;
  }
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin: 28px 0 36px;
}

.primary,
.ghost {
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.primary {
  background: var(--primary);
  color: #03030a;
  box-shadow: var(--glow);
}

.ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.primary:hover,
.ghost:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--hover-glow);
}

.hero-stats {
  display: flex;
  gap: 32px;
}

.hero-stats strong {
  font-size: 1.5rem;
  display: block;
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--panel-border-soft);
  padding: 28px;
  border-radius: 24px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(7, 10, 30, 0.6);
}

.hero-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, var(--panel-accent-soft), transparent 60%);
  pointer-events: none;
}

.pulse {
  position: absolute;
  inset: 20% 10% auto;
  height: 60px;
  border-radius: 999px;
  background: radial-gradient(circle, var(--hover-glow), transparent 60%);
  filter: blur(6px);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(0.95);
  }
  50% {
    transform: scale(1.05);
  }
}

.card-header,
.card-footer {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.85rem;
}

.status {
  color: var(--primary);
}

.hero-card h3 {
  margin: 16px 0 12px;
  font-size: 1.2rem;
}

.hero-card ul {
  list-style: none;
  color: var(--muted);
}

.hero-card li {
  margin-bottom: 8px;
}

.signature {
  color: var(--primary);
}

main {
  padding: 0 8vw 80px;
  display: flex;
  flex-direction: column;
  gap: 70px;
}

.section {
  display: grid;
  gap: 24px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.section h2 {
  font-size: 2rem;
}

.section p {
  color: var(--muted);
}

.glass {
  background: var(--surface);
  border: 1px solid var(--panel-accent-soft);
  border-radius: 24px;
  padding: 32px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--panel-bg-strong);
  border-radius: 20px;
  padding: 24px;
  border: 1px solid var(--panel-accent-soft);
  transition: transform 0.3s ease, border 0.3s ease;
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--border);
}

.project-card span {
  display: block;
  color: var(--muted);
  margin-top: 12px;
  font-size: 0.85rem;
}

.stack-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.stack-list div,
.stack-list a {
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--stack-bg);
  border: 1px solid var(--border);
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
}

.contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  align-items: center;
}

.contact-form {
  display: grid;
  gap: 16px;
}

.contact-form input,
.contact-form textarea {
  background: var(--field-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 16px;
  color: var(--text);
  font-size: 0.95rem;
}

.contact-form button {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  border: none;
  padding: 12px;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
}

.site-footer {
  padding: 32px 8vw 40px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  color: var(--muted);
}

/* -------- Writing / Markdown typography -------- */
.post-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 28px;
  align-items: start;
}

.post-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1.15;
}

.post-meta {
  color: var(--muted);
  margin-top: 10px;
}

.post-meta a {
  color: var(--muted);
  text-decoration: none;
}

.post-meta a:hover {
  color: var(--primary);
}

.post-content {
  margin-top: 22px;
  color: var(--text);
  font-size: 1.04rem;
  line-height: 1.85;
}

.post-content :is(p, ul, ol, blockquote, pre) {
  margin: 16px 0;
}

.post-content :is(h2, h3) {
  margin-top: 28px;
  margin-bottom: 10px;
  line-height: 1.25;
}

.post-content h2 {
  font-size: 1.35rem;
}

.post-content h3 {
  font-size: 1.15rem;
  color: var(--text-strong);
}

.post-content a {
  color: var(--primary);
}

.post-content a:hover {
  filter: brightness(1.1);
}

.post-content blockquote {
  border-left: 3px solid var(--blockquote-border);
  padding-left: 14px;
  color: var(--blockquote-text);
  background: var(--blockquote-bg);
  border-radius: 12px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.post-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 0.15em 0.35em;
  border-radius: 8px;
}

.post-content pre {
  background: var(--pre-bg);
  border: 1px solid var(--code-border);
  border-radius: 16px;
  padding: 14px 16px;
  overflow: auto;
}

.post-content pre code {
  background: transparent;
  border: none;
  padding: 0;
}

/* Images in markdown should be responsive on mobile */
.post-content img,
.post-content video,
.post-content iframe {
  max-width: 100%;
}

.post-content img {
  height: auto;
  display: block;
  margin: 18px auto;
  border-radius: 14px;
  border: 1px solid var(--image-border);
}

.toc {
  position: sticky;
  top: 24px;
  background: var(--toc-bg);
  border: 1px solid var(--image-border);
  border-radius: 16px;
  padding: 14px 14px;
}

.toc-title {
  font-weight: 600;
  color: var(--text-dim-strong);
  margin-bottom: 10px;
}

.toc ol {
  list-style: none;
  padding-left: 0;
  display: grid;
  gap: 8px;
}

.toc a {
  color: var(--muted);
  text-decoration: none;
}

.toc a:hover {
  color: var(--primary);
}

.toc li.d3 {
  padding-left: 10px;
}

@media (max-width: 900px) {
  .post-shell {
    grid-template-columns: 1fr;
  }
  .toc {
    position: relative;
    top: 0;
    order: -1;
  }
}

@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-right {
    width: 100%;
    justify-content: space-between;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero-actions,
  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* -------- Quick Search (Cmd/Ctrl+K) -------- */
.quick-search {
  width: min(880px, calc(100vw - 32px));
  border: 1px solid var(--modal-border);
  border-radius: 18px;
  padding: 0;
  background: var(--modal-bg);
  color: var(--text);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.55);
}

.quick-search::backdrop {
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
}

.quick-search__bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--modal-divider);
}

.quick-search__hint {
  margin-left: auto;
  font-size: 0.85rem;
  color: var(--muted);
}

.quick-search__close {
  border: 1px solid var(--modal-close-border);
  background: transparent;
  color: var(--text);
  border-radius: 10px;
  width: 34px;
  height: 32px;
  cursor: pointer;
}

.quick-search__root {
  padding: 14px;
}

/* Tweak Pagefind UI inside modal */
.quick-search .pagefind-ui__search-input {
  background: var(--field-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--text);
}

/* Post Navigation (Prev/Next) */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  border-radius: var(--theme-radius-sm);
  border: 1px solid var(--border);
  text-decoration: none;
  transition: all 0.2s ease;
  background: var(--panel-bg-strong);
}

.post-nav-link:hover {
  border-color: var(--primary);
  background: var(--panel-accent-soft);
}

.post-nav-link--placeholder {
  visibility: hidden;
}

.post-nav-label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
}

.post-nav-title {
  color: var(--text);
  font-weight: 600;
  line-height: 1.4;
}

.post-nav-link--prev {
  text-align: left;
  align-items: flex-start;
}

.post-nav-link--next {
  text-align: right;
  align-items: flex-end;
}

@media (max-width: 768px) {
  .post-nav {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .post-nav-link--prev,
  .post-nav-link--next {
    text-align: left;
    align-items: flex-start;
  }
}

/* Spring Theme Decorations - Cherry Blossom Petals */
:root[data-theme='spring'] .spring-petals {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

:root[data-theme='spring'] .spring-petal {
  position: absolute;
  width: 12px;
  height: 12px;
  background: linear-gradient(135deg, #ffb7c5 0%, #ffd1dc 100%);
  border-radius: 12px 0 12px 0;
  opacity: 0.7;
  animation: petal-fall linear infinite;
}

:root[data-theme='spring'] .spring-petal:nth-child(1) { left: 5%; animation-duration: 12s; animation-delay: 0s; }
:root[data-theme='spring'] .spring-petal:nth-child(2) { left: 15%; animation-duration: 15s; animation-delay: 2s; }
:root[data-theme='spring'] .spring-petal:nth-child(3) { left: 25%; animation-duration: 11s; animation-delay: 4s; }
:root[data-theme='spring'] .spring-petal:nth-child(4) { left: 35%; animation-duration: 14s; animation-delay: 1s; }
:root[data-theme='spring'] .spring-petal:nth-child(5) { left: 45%; animation-duration: 13s; animation-delay: 3s; }
:root[data-theme='spring'] .spring-petal:nth-child(6) { left: 55%; animation-duration: 16s; animation-delay: 5s; }
:root[data-theme='spring'] .spring-petal:nth-child(7) { left: 65%; animation-duration: 12s; animation-delay: 2s; }
:root[data-theme='spring'] .spring-petal:nth-child(8) { left: 75%; animation-duration: 14s; animation-delay: 4s; }
:root[data-theme='spring'] .spring-petal:nth-child(9) { left: 85%; animation-duration: 11s; animation-delay: 1s; }
:root[data-theme='spring'] .spring-petal:nth-child(10) { left: 95%; animation-duration: 15s; animation-delay: 3s; }

@keyframes petal-fall {
  0% {
    transform: translateY(-10vh) rotate(0deg) translateX(0);
    opacity: 0;
  }
  10% {
    opacity: 0.7;
  }
  90% {
    opacity: 0.7;
  }
  100% {
    transform: translateY(110vh) rotate(720deg) translateX(50px);
    opacity: 0;
  }
}

/* Accessibility: Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  :root[data-theme='spring'] .spring-petals {
    display: none;
  }
}