/* ============================================
   Atomic Task Graph — design system
   Concept: technical / developer / data
   Display: Cabinet Grotesk · Body: Satoshi
   Accent: indigo on cool neutral surfaces
   ============================================ */

:root,
[data-theme='light'] {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-2: #fcfdfe;
  --color-surface-offset: #eef1f5;
  --color-surface-offset-2: #e6eaf1;
  --color-divider: #e2e6ec;
  --color-border: #d9dee6;

  --color-text: #16181d;
  --color-text-muted: #5b6472;
  --color-text-faint: #97a0ad;
  --color-text-inverse: #ffffff;

  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-primary-active: #3730a3;
  --color-primary-soft: #eef0fe;
  --color-accent-2: #0ea5b7;

  --color-success: #16a34a;
  --color-warning: #b45309;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px rgba(20, 24, 35, 0.06);
  --shadow-md: 0 6px 20px rgba(20, 24, 35, 0.08);
  --shadow-lg: 0 18px 48px rgba(20, 24, 35, 0.14);

  --content-narrow: 680px;
  --content-default: 960px;
  --content-wide: 1200px;
}

[data-theme='dark'] {
  --color-bg: #0d0e12;
  --color-surface: #16181d;
  --color-surface-2: #1b1e25;
  --color-surface-offset: #1a1d24;
  --color-surface-offset-2: #21252e;
  --color-divider: #23272f;
  --color-border: #2b303a;

  --color-text: #e6e8ee;
  --color-text-muted: #9aa3b2;
  --color-text-faint: #5c6573;
  --color-text-inverse: #16181d;

  --color-primary: #818cf8;
  --color-primary-hover: #a5b0fc;
  --color-primary-active: #c4cbfe;
  --color-primary-soft: #1e2030;
  --color-accent-2: #2dd4e0;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.55);
}

/* ---- Type scale ---- */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.7vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.3vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.8vw, 3.5rem);
  --text-hero: clamp(2.6rem, 0.6rem + 7vw, 6rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --font-display: 'Cabinet Grotesk', 'Inter', system-ui, sans-serif;
  --font-body: 'Satoshi', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

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

html {
  -webkit-text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(
      circle at 12% -8%,
      color-mix(in oklab, var(--color-primary) 14%, transparent),
      transparent 42%
    ),
    radial-gradient(
      circle at 92% 0%,
      color-mix(in oklab, var(--color-accent-2) 10%, transparent),
      transparent 38%
    );
  background-attachment: fixed;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

ul[role='list'],
ol[role='list'] {
  list-style: none;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

p,
li,
figcaption {
  text-wrap: pretty;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
a:hover {
  color: var(--color-primary-hover);
}

::selection {
  background: color-mix(in oklab, var(--color-primary) 28%, transparent);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

table {
  border-collapse: collapse;
  width: 100%;
}

.site-nav a.nav-cta {
  color: var(--color-text-inverse);
}
.site-nav a.nav-cta:hover {
  color: var(--color-text-inverse);
  background: var(--color-primary-hover);
}
[data-theme='dark'] .site-nav a.nav-cta {
  background: #5b54e8;
  color: #ffffff;
}
[data-theme='dark'] .site-nav a.nav-cta:hover {
  background: #4f46e5;
  color: #ffffff;
}

[data-theme='dark'] .btn--primary {
  background: #5b54e8;
  color: #ffffff;
}
[data-theme='dark'] .btn--primary:hover {
  background: #4f46e5;
  color: #ffffff;
}

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

/* ---- Layout primitives ---- */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container-wide {
  max-width: var(--content-wide);
}

.container-narrow {
  max-width: var(--content-narrow);
}

.section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.brand:hover {
  color: var(--color-text);
}
.brand__mark {
  width: 30px;
  height: 30px;
  flex: none;
  color: var(--color-primary);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.site-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}
.site-nav a:hover {
  color: var(--color-text);
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-primary);
}

@media (max-width: 640px) {
  .site-nav a:not(.nav-cta) {
    display: none;
  }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-body);
  transition: all var(--transition-interactive);
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--ghost {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---- Hero ---- */
.hero {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
  position: relative;
  overflow: hidden;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  padding: var(--space-1) var(--space-3);
  border: 1px solid color-mix(in oklab, var(--color-primary) 35%, transparent);
  border-radius: var(--radius-full);
  background: var(--color-primary-soft);
  margin-bottom: var(--space-6);
}
.hero__eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
}
.hero h1 {
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 1.02;
  margin-bottom: var(--space-6);
}
.hero h1 .accent {
  color: var(--color-primary);
}
.hero__lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 58ch;
  margin-bottom: var(--space-8);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.hero__graph {
  position: absolute;
  right: -6%;
  top: 14%;
  width: 46%;
  max-width: 540px;
  opacity: 0.5;
  pointer-events: none;
  color: var(--color-primary);
}
@media (max-width: 900px) {
  .hero__graph {
    display: none;
  }
}

/* ---- Stat strip ---- */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  margin-top: var(--space-12);
}
.stat {
  text-align: center;
  padding: var(--space-2);
}
.stat__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--color-primary);
  letter-spacing: -0.03em;
}
.stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}
@media (max-width: 640px) {
  .stat-strip {
    grid-template-columns: 1fr;
  }
}

/* ---- Section heading ---- */
.section-head {
  max-width: 64ch;
  margin-bottom: var(--space-10);
}
.section-head__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.section-head h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}
.section-head p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

/* ---- Article cards ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
@media (max-width: 900px) {
  .card-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-interactive);
  box-shadow: var(--shadow-sm);
}
.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in oklab, var(--color-primary) 40%, var(--color-border));
  box-shadow: var(--shadow-md);
}
.card__media {
  aspect-ratio: 16 / 9;
  background: var(--color-surface-offset);
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}
.card__body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card__tag {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}
.card__title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  line-height: 1.25;
}
.card__title a {
  color: var(--color-text);
}
.card__title a:hover {
  color: var(--color-primary);
}
.card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: var(--space-5);
}
.card__meta {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: flex;
  gap: var(--space-3);
}

/* ---- Domain for-sale panel ---- */
.sale-panel {
  background: linear-gradient(
    in oklab,
    var(--color-primary-soft),
    var(--color-surface)
  );
  border: 1px solid color-mix(in oklab, var(--color-primary) 28%, var(--color-border));
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 5vw, var(--space-16));
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.sale-panel h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}
.sale-panel p {
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

/* ---- Contact form ---- */
.sale-panel__form {
  max-width: 560px;
  margin-inline: auto;
  text-align: left;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 560px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}
.form-field {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-4);
}
.form-field label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-size: var(--text-base);
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-interactive),
    box-shadow var(--transition-interactive);
  resize: vertical;
}
.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--color-text-faint);
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 18%, transparent);
}
#inquiry-form .btn--primary {
  width: 100%;
  margin-top: var(--space-2);
}
#if-submit[disabled] {
  opacity: 0.6;
  cursor: progress;
}
.form-status {
  font-size: var(--text-sm);
  text-align: center;
  margin-top: var(--space-4);
  min-height: 1.2em;
}
.form-status--ok {
  color: var(--color-success);
  font-weight: 600;
}
.form-status--err {
  color: var(--color-warning);
  font-weight: 600;
}
.domain-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}
.domain-chip {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  padding: 0.4rem 0.9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
}

/* ---- Article (blog) layout ---- */
.article-hero {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}
.article-hero__meta {
  display: flex;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}
.article-hero__meta .tag {
  color: var(--color-primary);
  font-weight: 600;
}
.article-hero h1 {
  font-size: var(--text-2xl);
  max-width: 18ch;
  margin-bottom: var(--space-5);
}
.article-hero__lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
}

.article-body {
  padding-block: var(--space-10) var(--space-24);
  font-size: var(--text-base);
}
.article-body h2 {
  font-size: var(--text-xl);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}
.article-body h3 {
  font-size: var(--text-lg);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}
.article-body p {
  margin-bottom: var(--space-5);
  max-width: 72ch;
}
.article-body ul,
.article-body ol {
  margin: 0 0 var(--space-5) 0;
  padding-left: 1.4em;
  max-width: 72ch;
}
.article-body li {
  margin-bottom: var(--space-2);
}
.article-body li::marker {
  color: var(--color-primary);
}
.article-body strong {
  color: var(--color-text);
  font-weight: 700;
}
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-surface-offset);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}
.article-body pre {
  font-family: var(--font-mono);
  font-size: 0.82em;
  line-height: 1.6;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-6) 0;
  overflow-x: auto;
  max-width: 76ch;
}
.article-body pre code {
  background: none;
  padding: 0;
  font-size: 1em;
}
.article-body a {
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
}

.article-body table {
  margin: var(--space-6) 0;
  font-size: var(--text-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.article-body th,
.article-body td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-divider);
  vertical-align: top;
}
.article-body thead th {
  background: var(--color-surface-offset);
  font-weight: 700;
  color: var(--color-text);
}
.article-body tbody tr:last-child td {
  border-bottom: none;
}
.article-body tbody tr:nth-child(even) {
  background: var(--color-surface-2);
}

.callout {
  border-left: 3px solid var(--color-primary);
  background: var(--color-primary-soft);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  margin: var(--space-6) 0;
  font-size: var(--text-sm);
}
.callout strong {
  color: var(--color-primary);
}

.article-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-8);
  margin-top: var(--space-12);
}
.article-nav a {
  font-weight: 600;
  font-size: var(--text-sm);
}

.disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-6);
  margin-top: var(--space-10);
  max-width: 72ch;
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  justify-content: space-between;
  align-items: center;
}
.footer-links {
  display: flex;
  gap: var(--space-5);
}
.footer-links a {
  color: var(--color-text-muted);
}
.footer-links a:hover {
  color: var(--color-text);
}