/* DataZine.net – single page (no external deps) */

:root {
  --bg: #0b0e14;
  --bg2: #0e1320;
  --card: rgba(255, 255, 255, 0.06);
  --card2: rgba(255, 255, 255, 0.08);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.72);
  --muted2: rgba(255, 255, 255, 0.58);
  --line: rgba(255, 255, 255, 0.12);

  --accent: #7c5cff;
  --accent2: #2fe3c0;
  --warn: #ffb020;

  --shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  --radius: 18px;

  --container: 1120px;
  --pad: 24px;

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji",
    "Segoe UI Emoji";
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

html[data-theme="light"] {
  --bg: #f7f8fb;
  --bg2: #eef2ff;
  --card: rgba(0, 0, 0, 0.04);
  --card2: rgba(0, 0, 0, 0.06);
  --text: rgba(0, 0, 0, 0.88);
  --muted: rgba(0, 0, 0, 0.62);
  --muted2: rgba(0, 0, 0, 0.52);
  --line: rgba(0, 0, 0, 0.12);
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.12);
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(1000px 600px at 30% 10%, rgba(124, 92, 255, 0.25), transparent 60%),
    radial-gradient(900px 500px at 80% 20%, rgba(47, 227, 192, 0.18), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  font-family: var(--mono);
  font-size: 0.95em;
  padding: 0.1em 0.35em;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 10px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad);
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  padding: 10px 14px;
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.skip-link:focus {
  left: 12px;
  z-index: 1000;
}

.muted {
  color: var(--muted);
}
.tiny {
  font-size: 0.9rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: color-mix(in oklab, var(--bg) 55%, transparent);
  border-bottom: 1px solid transparent;
}
.site-header.is-elevated {
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 72px;
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  min-width: 220px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: 0.02em;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.9), rgba(47, 227, 192, 0.8));
  color: #0b0e14;
  box-shadow: 0 10px 26px rgba(124, 92, 255, 0.25);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-name {
  font-weight: 800;
  font-size: 1.05rem;
}
.brand-tag {
  color: var(--muted2);
  font-size: 0.9rem;
}

.nav {
  display: none;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}
.nav a {
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 12px;
  transition: background 180ms var(--ease), color 180ms var(--ease);
}
.nav a:hover {
  background: var(--card);
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Buttons */
.btn,
.icon-btn,
.chip {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  border-radius: 14px;
  padding: 10px 14px;
  font-weight: 650;
  cursor: pointer;
  transition: transform 160ms var(--ease), background 160ms var(--ease), border-color 160ms var(--ease);
}
.btn:hover,
.icon-btn:hover,
.chip:hover {
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--line) 60%, var(--accent) 40%);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.95), rgba(47, 227, 192, 0.75));
  color: #061018;
  border-color: transparent;
  box-shadow: 0 18px 44px rgba(124, 92, 255, 0.22);
}
.btn-secondary {
  background: color-mix(in oklab, var(--card) 70%, rgba(47, 227, 192, 0.16));
}
.btn-ghost {
  background: transparent;
}
.w-full {
  width: 100%;
}

.icon-btn {
  width: 42px;
  height: 42px;
  padding: 0;
  display: grid;
  place-items: center;
}
.icon {
  font-size: 1.05rem;
  line-height: 1;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 999px;
}
.chip-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--accent) 20%, transparent);
}

.nav-toggle {
  display: inline-grid;
}

.mobile-nav {
  border-top: 1px solid var(--line);
  background: color-mix(in oklab, var(--bg) 80%, transparent);
}
.mobile-nav-inner {
  display: grid;
  gap: 10px;
  padding: 14px var(--pad) 18px;
}
.mobile-nav a {
  color: var(--muted);
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--card);
}
.mobile-nav a:hover {
  color: var(--text);
}

/* Sections */
.section {
  padding: 72px 0;
}
.section-alt {
  background: linear-gradient(180deg, transparent 0%, color-mix(in oklab, var(--card) 70%, transparent) 35%, transparent 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.6rem, 1.2rem + 1vw, 2.2rem);
  letter-spacing: -0.02em;
}
.section-head p {
  margin: 0;
  max-width: 72ch;
}

/* Hero */
.hero {
  padding: 78px 0 56px;
}
.hero-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}
.kicker {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-weight: 650;
  letter-spacing: 0.02em;
  margin: 0 0 10px;
}
.hero-title {
  margin: 0 0 12px;
  font-size: clamp(2.1rem, 1.5rem + 2.2vw, 3.2rem);
  letter-spacing: -0.035em;
  line-height: 1.08;
}
.hero-sub {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.55;
  max-width: 70ch;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 22px;
}

.hero-metrics {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(1, minmax(0, 1fr));
}
.metric {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px 14px 12px;
}
.metric-top {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.metric-num {
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: 1.2rem;
}
.metric-lbl {
  color: var(--muted);
  font-weight: 650;
}
.metric-sub {
  margin: 8px 0 0;
  color: var(--muted2);
}

.hero-panel {
  position: relative;
}
.panel-card {
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--card) 75%, transparent);
  border-radius: 22px;
  padding: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: color-mix(in oklab, var(--card) 60%, rgba(124, 92, 255, 0.18));
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 700;
  color: var(--text);
}
.panel-date {
  color: var(--muted2);
  font-size: 0.95rem;
}
.panel-title {
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}
.panel-text {
  margin: 0 0 14px;
  color: var(--muted);
  line-height: 1.55;
}
.panel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
}
.tag {
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--muted);
  font-weight: 650;
  font-size: 0.92rem;
}
.panel-glow {
  position: absolute;
  inset: -60px -60px auto auto;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle at 30% 30%, rgba(124, 92, 255, 0.35), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(47, 227, 192, 0.22), transparent 62%);
  filter: blur(12px);
  pointer-events: none;
}

/* Cards & grids */
.grid {
  display: grid;
  gap: 14px;
}
.cards-3 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}
.card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px;
  overflow: hidden;
}
.card h3 {
  margin: 8px 0 10px;
  letter-spacing: -0.01em;
}
.card p {
  margin: 0 0 12px;
  color: var(--muted);
  line-height: 1.55;
}
.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--card) 70%, rgba(47, 227, 192, 0.12));
  display: grid;
  place-items: center;
  font-size: 1.2rem;
}
.card-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}
.card-list li {
  margin: 8px 0;
}
.numbered {
  padding-left: 20px;
}

.callout {
  margin-top: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.12), rgba(47, 227, 192, 0.08));
  border-radius: 22px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.callout h3 {
  margin: 0 0 6px;
}
.callout p {
  margin: 0;
}

/* Toolbar */
.toolbar {
  display: grid;
  gap: 12px;
  margin: 18px 0 16px;
  padding: 14px;
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--card) 70%, transparent);
  border-radius: 22px;
}
.search input {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 16px;
  padding: 12px 12px;
  color: var(--text);
  outline: none;
}
.search input:focus {
  border-color: color-mix(in oklab, var(--line) 60%, var(--accent) 40%);
  box-shadow: 0 0 0 6px color-mix(in oklab, var(--accent) 18%, transparent);
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.toolbar-right {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}
.sort select {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 14px;
  padding: 10px 12px;
  color: var(--text);
  outline: none;
}

/* Article cards */
.article-card {
  position: relative;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  transition: transform 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}
.article-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in oklab, var(--line) 55%, var(--accent) 45%);
  background: var(--card2);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: var(--muted2);
  font-size: 0.92rem;
}
.article-title {
  margin: 10px 0 10px;
  letter-spacing: -0.02em;
  line-height: 1.18;
}
.article-deck {
  margin: 0 0 12px;
  color: var(--muted);
  line-height: 1.55;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pill {
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--card) 80%, transparent);
  color: var(--muted);
  font-weight: 650;
  font-size: 0.9rem;
}

.empty-state {
  text-align: center;
  padding: 32px 16px;
  border: 1px dashed var(--line);
  border-radius: 22px;
  background: color-mix(in oklab, var(--card) 70%, transparent);
}
.empty-state h3 {
  margin: 0 0 6px;
}

/* Newsletter */
.newsletter {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
.newsletter-form {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 22px;
  padding: 16px;
}
.field {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}
label {
  font-weight: 700;
  color: var(--muted);
}
input,
select {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 16px;
  padding: 12px 12px;
  color: var(--text);
  outline: none;
}
input:focus,
select:focus {
  border-color: color-mix(in oklab, var(--line) 60%, var(--accent) 40%);
  box-shadow: 0 0 0 6px color-mix(in oklab, var(--accent) 18%, transparent);
}
.hint {
  margin: 0;
  color: var(--muted2);
  font-size: 0.95rem;
}
.form-msg {
  margin: 10px 0 0;
  color: var(--muted);
  font-weight: 650;
}
.newsletter-aside {
  display: grid;
  gap: 14px;
}
.aside-card {
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--card) 70%, transparent);
  border-radius: 22px;
  padding: 16px;
}
.checklist {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

/* About */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.divider {
  margin: 24px 0;
  height: 1px;
  background: var(--line);
}

.quote {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(47, 227, 192, 0.12), rgba(124, 92, 255, 0.10));
  padding: 18px;
}
.quote-text {
  margin: 0 0 8px;
  font-size: 1.15rem;
  color: var(--text);
}
.quote-by {
  margin: 0;
  color: var(--muted2);
}

/* Contact */
.contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.contact-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}
.contact-row:first-of-type {
  border-top: none;
}
.contact-label {
  color: var(--muted2);
  font-weight: 700;
}
.contact-link {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.social {
  display: flex;
  gap: 12px;
}
.social a {
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.social a:hover {
  color: var(--text);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0;
  background: color-mix(in oklab, var(--bg) 75%, transparent);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}
.footer-left {
  display: flex;
  gap: 12px;
  align-items: center;
}
.brand-mini {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.9), rgba(47, 227, 192, 0.8));
  color: #0b0e14;
  font-weight: 900;
}
.footer-right {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--muted2);
}
.footer-right a {
  color: var(--muted);
}
.footer-right a:hover {
  color: var(--text);
}
.dot {
  opacity: 0.7;
}
.to-top {
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--card);
}

/* Modal */
.modal {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 0;
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  color: var(--text);
  box-shadow: var(--shadow);
  max-width: min(860px, 92vw);
}
.modal::backdrop {
  background: rgba(0, 0, 0, 0.55);
}
.modal-inner {
  padding: 16px;
}
.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  margin-bottom: 12px;
}
.modal-title {
  margin: 6px 0 0;
  letter-spacing: -0.02em;
}
.modal-body {
  max-height: min(55vh, 520px);
  overflow: auto;
  padding-right: 6px;
}
.modal-body p {
  color: var(--muted);
  line-height: 1.7;
}
.modal-body h4 {
  margin: 16px 0 8px;
}
.modal-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  margin-top: 12px;
}

/* Responsive */
@media (min-width: 860px) {
  .nav {
    display: flex;
  }
  .nav-toggle {
    display: none;
  }
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 26px;
  }
  .hero-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .cards-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .toolbar {
    grid-template-columns: 1.1fr 1.4fr auto;
    align-items: center;
  }
  .toolbar-right {
    justify-content: flex-end;
  }
  .newsletter {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }
  .two-col {
    grid-template-columns: 1fr 1fr;
  }
  .contact {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}