@import url("https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap");

:root {
  --bg-base: #ecf3ff;
  --bg-soft: #f8fbff;
  --text-main: #13213a;
  --text-soft: #5a6d8c;
  --accent: #2f7cff;
  --accent-2: #5ed1ff;
  --glass-bg: rgba(255, 255, 255, 0.42);
  --glass-strong: rgba(255, 255, 255, 0.62);
  --glass-border: rgba(255, 255, 255, 0.68);
  --glass-inset: rgba(255, 255, 255, 0.44);
  --shadow: 0 18px 45px rgba(35, 71, 134, 0.18);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --bg-layer-1: radial-gradient(circle at 15% 8%, rgba(255, 255, 255, 0.95) 0%, transparent 45%);
  --bg-layer-2: radial-gradient(circle at 82% 12%, rgba(93, 195, 255, 0.2) 0%, transparent 35%);
  --bg-layer-3: radial-gradient(circle at 80% 78%, rgba(45, 132, 255, 0.15) 0%, transparent 42%);
  --orb-1: radial-gradient(circle, rgba(95, 197, 255, 0.9) 0%, rgba(95, 197, 255, 0) 70%);
  --orb-2: radial-gradient(circle, rgba(89, 122, 255, 0.85) 0%, rgba(89, 122, 255, 0) 70%);
  --orb-opacity: 0.58;
  --grid-line: rgba(133, 167, 223, 0.09);
}

:root[data-theme="dark"] {
  --bg-base: #091423;
  --bg-soft: #0f1e31;
  --text-main: #e5f0ff;
  --text-soft: #9db0cc;
  --accent: #79b2ff;
  --accent-2: #63dbff;
  --glass-bg: rgba(19, 33, 55, 0.48);
  --glass-strong: rgba(23, 39, 65, 0.68);
  --glass-border: rgba(153, 194, 255, 0.22);
  --glass-inset: rgba(255, 255, 255, 0.08);
  --shadow: 0 22px 60px rgba(2, 10, 22, 0.55);
  --bg-layer-1: radial-gradient(circle at 15% 8%, rgba(150, 185, 255, 0.07) 0%, transparent 45%);
  --bg-layer-2: radial-gradient(circle at 82% 12%, rgba(87, 156, 255, 0.08) 0%, transparent 35%);
  --bg-layer-3: radial-gradient(circle at 80% 78%, rgba(56, 110, 205, 0.09) 0%, transparent 42%);
  --orb-1: radial-gradient(circle, rgba(94, 149, 224, 0.34) 0%, rgba(94, 149, 224, 0) 70%);
  --orb-2: radial-gradient(circle, rgba(73, 102, 189, 0.3) 0%, rgba(73, 102, 189, 0) 70%);
  --orb-opacity: 0.3;
  --grid-line: rgba(122, 154, 206, 0.03);
}

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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--text-main);
  background: var(--bg-layer-1),
    var(--bg-layer-2),
    var(--bg-layer-3),
    linear-gradient(165deg, var(--bg-base), var(--bg-soft));
  line-height: 1.7;
  padding: 1rem clamp(0.9rem, 2.4vw, 2.2rem) 2rem;
  overflow-x: hidden;
  position: relative;
}

body::before,
body::after {
  content: "";
  position: fixed;
  width: 38rem;
  height: 38rem;
  border-radius: 50%;
  filter: blur(65px);
  z-index: -2;
  pointer-events: none;
  opacity: var(--orb-opacity);
  animation: drift 16s ease-in-out infinite;
}

body::before {
  top: -18rem;
  right: -9rem;
  background: var(--orb-1);
}

body::after {
  bottom: -20rem;
  left: -10rem;
  background: var(--orb-2);
  animation-delay: -8s;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at center, black 48%, transparent 95%);
  z-index: -1;
  pointer-events: none;
}

a {
  color: inherit;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-family: "Sora", "Segoe UI", sans-serif;
}

p {
  margin: 0;
}

.glass {
  background: linear-gradient(145deg, var(--glass-bg), var(--glass-strong));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow), inset 0 1px 0 var(--glass-inset);
  backdrop-filter: blur(16px) saturate(165%);
  -webkit-backdrop-filter: blur(16px) saturate(165%);
  position: relative;
}

.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    120deg,
    rgba(255, 255, 255, 0.42) 0%,
    rgba(255, 255, 255, 0.04) 34%,
    rgba(255, 255, 255, 0.18) 100%
  );
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 1rem;
  z-index: 40;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.65rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.brand {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.95rem;
  border-radius: 999px;
  font-weight: 600;
}

.brand:hover {
  background: rgba(255, 255, 255, 0.24);
}

.brand-dot {
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--accent-2), var(--accent));
  box-shadow: 0 0 0 3px rgba(110, 177, 255, 0.2);
}

.brand-text {
  font-family: "Sora", "Segoe UI", sans-serif;
  font-size: 0.92rem;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.32rem;
  border-radius: 999px;
}

.site-nav a {
  text-decoration: none;
  font-weight: 500;
  font-size: 0.92rem;
  color: var(--text-soft);
  border-radius: 999px;
  padding: 0.58rem 0.9rem;
  transition: color 220ms ease, background-color 220ms ease, transform 220ms ease;
}

.site-nav a:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.3);
}

.site-nav a.is-active {
  color: #f7fcff;
  background: linear-gradient(145deg, var(--accent), #4a8fff);
  box-shadow: 0 10px 18px rgba(58, 121, 255, 0.35);
}

.menu-toggle,
.theme-toggle {
  border: 0;
  background: transparent;
  color: var(--text-main);
  cursor: pointer;
  font-family: inherit;
}

.menu-toggle {
  display: none;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.33);
}

.theme-toggle {
  margin-left: 0.15rem;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.32);
  transition: transform 220ms ease, background-color 220ms ease;
}

.theme-toggle:hover {
  transform: translateY(-2px);
}

.page {
  width: min(1120px, 100%);
  margin: 1.4rem auto;
}

.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1rem;
  align-items: stretch;
}

.hero-copy,
.hero-panel {
  padding: clamp(1.2rem, 2vw, 2rem);
}

.hero-copy {
  border-radius: var(--radius-xl);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.66), rgba(255, 255, 255, 0.18));
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin-bottom: 0.75rem;
  display: inline-block;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--accent);
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  margin-bottom: 1rem;
}

.hero p {
  color: var(--text-soft);
}

.actions {
  margin-top: 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.button {
  text-decoration: none;
  border-radius: 999px;
  padding: 0.74rem 1.2rem;
  font-weight: 600;
  color: #f8fbff;
  background: linear-gradient(145deg, var(--accent), #4f88ff);
  box-shadow: 0 14px 28px rgba(58, 120, 255, 0.32);
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.ghost {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.48);
  box-shadow: none;
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.hero-panel {
  overflow: hidden;
}

.hero-panel h2 {
  margin-bottom: 0.85rem;
  font-size: 1.2rem;
}

.clean-list {
  margin: 0;
  padding-left: 1.05rem;
  display: grid;
  gap: 0.52rem;
  color: var(--text-soft);
}

.tiny-link {
  text-decoration: none;
  margin-top: 1rem;
  display: inline-block;
  color: var(--accent);
  font-weight: 600;
}

.section {
  margin-top: 1.1rem;
}

.section-head {
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.section-head h2 {
  margin: 0;
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.post-card {
  padding: 1.1rem;
  border-radius: var(--radius-lg);
  transition: transform 240ms ease, box-shadow 240ms ease;
}

.post-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 26px 48px rgba(28, 58, 113, 0.24);
}

.post-card h2,
.post-card h3 {
  margin-bottom: 0.55rem;
  font-size: 1.25rem;
}

.post-card p {
  color: var(--text-soft);
}

.meta {
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.45rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.week-note {
  padding: 1.35rem;
}

.week-note h2 {
  margin-bottom: 0.5rem;
}

.week-note p {
  color: var(--text-soft);
}

.intro-section {
  padding: 1.35rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(130deg, rgba(255, 255, 255, 0.58), rgba(255, 255, 255, 0.18));
  border: 1px solid rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow);
}

.intro-section h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  margin-bottom: 0.7rem;
}

.intro-section p {
  color: var(--text-soft);
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.pane {
  padding: 1.15rem;
  border-radius: var(--radius-lg);
}

.pane h2 {
  margin-bottom: 0.65rem;
  font-size: 1.2rem;
}

.pane p {
  color: var(--text-soft);
}

.now-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.article-page {
  max-width: 920px;
}

.article-shell {
  padding: clamp(1.2rem, 2.5vw, 2.2rem);
}

.article-shell h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  margin-bottom: 0.7rem;
}

.lead {
  color: var(--text-main);
  font-size: 1.06rem;
  margin-bottom: 1rem;
}

.post-content {
  display: grid;
  gap: 0.95rem;
}

.post-content p {
  color: var(--text-soft);
}

.post-content h2 {
  margin-top: 0.45rem;
  margin-bottom: 0;
  font-size: 1.4rem;
}

.post-content blockquote {
  margin: 0;
  border-left: 4px solid var(--accent);
  padding: 0.8rem 1rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(255, 255, 255, 0.22);
  color: var(--text-main);
  font-weight: 500;
}

.post-content pre {
  margin: 0;
  overflow-x: auto;
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  background: rgba(13, 25, 44, 0.9);
}

.post-content code {
  color: #d7ecff;
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.9rem;
}

.article-nav {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.nav-pane {
  text-decoration: none;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--text-main);
}

.filter-row {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  margin-bottom: 0.8rem;
}

.filter-chip {
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.3);
  color: var(--text-soft);
  font: inherit;
  font-weight: 600;
  transition: background-color 220ms ease, color 220ms ease, transform 220ms ease;
}

.filter-chip:hover {
  transform: translateY(-1px);
}

.filter-chip.is-active {
  background: linear-gradient(145deg, var(--accent), #4d89ff);
  color: #fff;
  border-color: transparent;
}

.is-hidden {
  display: none !important;
}

.site-footer {
  width: min(1120px, 100%);
  margin: 1rem auto 0;
  padding: 0.8rem 1.15rem;
  border-radius: var(--radius-lg);
}

.site-footer p {
  color: var(--text-soft);
  font-size: 0.9rem;
}

[data-animate] {
  opacity: 0;
  transform: translateY(16px) scale(0.988);
  transition: opacity 620ms ease, transform 620ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@keyframes drift {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, 20px, 0);
  }
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .split,
  .now-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .site-header {
    flex-wrap: wrap;
    padding: 0.55rem;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
  }

  .theme-toggle {
    order: 3;
  }

  .site-nav {
    position: fixed;
    top: 5.1rem;
    left: 1rem;
    right: 1rem;
    border-radius: var(--radius-lg);
    padding: 0.5rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    transform: translateY(-9px);
    opacity: 0;
    pointer-events: none;
    transition: transform 260ms ease, opacity 260ms ease;
  }

  .site-nav a {
    border-radius: 12px;
  }

  body.nav-open .site-nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .article-nav {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  body {
    padding: 0.8rem 0.72rem 1.3rem;
  }

  .hero-copy,
  .hero-panel,
  .post-card,
  .pane,
  .article-shell {
    padding: 1rem;
  }
}