/* ============================================================
   Koodikast — style.css
   Dark theme foundation
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================================
   CSS Reset
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
video,
svg {
  display: block;
  max-width: 100%;
}

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

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

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

ul,
ol {
  list-style: none;
}

/* ============================================================
   Design Tokens
   ============================================================ */

:root {
  /* Colors */
  --color-bg:           #0a0a0f;
  --color-bg-elevated:  #111118;
  --color-bg-surface:   #16161f;
  --color-bg-muted:     #1e1e2a;

  --color-border:       #2a2a3a;
  --color-border-subtle: #1f1f2e;

  --color-accent:       #5b6ef5;
  --color-accent-hover: #7080ff;
  --color-accent-dim:   rgba(91, 110, 245, 0.15);

  --color-text-primary:   #e8e8f0;
  --color-text-secondary: #9898b0;
  --color-text-muted:     #5c5c78;
  --color-text-inverse:   #0a0a0f;

  --color-success: #3ecf8e;
  --color-warning: #f5a623;
  --color-error:   #f05252;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs:   0.75rem;    /* 12px */
  --text-sm:   0.875rem;   /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg:   1.125rem;   /* 18px */
  --text-xl:   1.25rem;    /* 20px */
  --text-2xl:  1.5rem;     /* 24px */
  --text-3xl:  1.875rem;   /* 30px */
  --text-4xl:  2.25rem;    /* 36px */
  --text-5xl:  3rem;       /* 48px */
  --text-6xl:  3.75rem;    /* 60px */

  --leading-tight:  1.25;
  --leading-snug:   1.375;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  --tracking-tight:  -0.02em;
  --tracking-normal:  0em;
  --tracking-wide:    0.05em;
  --tracking-widest:  0.1em;

  --weight-light:    300;
  --weight-regular:  400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-bold:     700;

  /* Spacing */
  --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;

  /* Layout */
  --container-sm:  640px;
  --container-md:  768px;
  --container-lg:  1024px;
  --container-xl:  1280px;
  --container-2xl: 1440px;

  --navbar-height: 4rem;

  /* Borders */
  --radius-sm:   0.25rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md:  0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg:  0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 24px rgba(91, 110, 245, 0.2);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* Z-index scale */
  --z-base:    0;
  --z-raised:  10;
  --z-overlay: 100;
  --z-modal:   200;
  --z-navbar:  300;
  --z-toast:   400;
}

/* ============================================================
   Base Styles
   ============================================================ */

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  color: var(--color-text-secondary);
  max-width: 65ch;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-bg-muted);
  color: var(--color-accent-hover);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

/* ============================================================
   Layout Utilities
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

@media (min-width: 1280px) {
  .container {
    padding-inline: var(--space-12);
  }
}

/* ============================================================
   Navbar
   ============================================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-navbar);
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  background-color: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: background-color var(--transition-base),
              border-color var(--transition-base);
}

.navbar.scrolled {
  background-color: rgba(10, 10, 15, 0.97);
  border-bottom-color: var(--color-border);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--weight-semibold);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

.navbar__logo-mark {
  font-family: var(--font-mono);
  color: var(--color-accent);
}

.navbar__nav {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .navbar__nav {
    display: flex;
  }
}

.navbar__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  transition: color var(--transition-fast);
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--color-text-primary);
}

.navbar__cta {
  display: none;
}

@media (min-width: 640px) {
  .navbar__cta {
    display: inline-flex;
  }
}

.navbar__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2rem;
  height: 2rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
}

@media (min-width: 768px) {
  .navbar__toggle {
    display: none;
  }
}

.navbar__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base),
              opacity var(--transition-base),
              background-color var(--transition-fast);
}

.navbar__toggle:hover .navbar__toggle-bar {
  background-color: var(--color-text-primary);
}

/* Mobile menu */
.navbar__mobile-menu {
  display: none;
  position: fixed;
  inset: var(--navbar-height) 0 0 0;
  background-color: var(--color-bg);
  padding: var(--space-8) var(--space-6);
  flex-direction: column;
  gap: var(--space-6);
  z-index: calc(var(--z-navbar) - 1);
  border-top: 1px solid var(--color-border);
}

.navbar__mobile-menu.open {
  display: flex;
}

.navbar__mobile-link {
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.navbar__mobile-link:hover {
  color: var(--color-text-primary);
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: var(--shadow-glow);
}

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

.btn--ghost:hover {
  background-color: var(--color-bg-muted);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--outline:hover {
  background-color: var(--color-accent-dim);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ============================================================
   Hero Section
   ============================================================ */

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100svh;
  padding-top: var(--navbar-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: var(--z-base);
  pointer-events: none;
}

/* Subtle grid overlay */
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(91, 110, 245, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 110, 245, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* Radial glow */
.hero__bg::after {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  max-width: 900px;
  height: 60vh;
  background: radial-gradient(
    ellipse at center,
    rgba(91, 110, 245, 0.12) 0%,
    rgba(91, 110, 245, 0.04) 40%,
    transparent 70%
  );
  filter: blur(40px);
}

.hero__content {
  position: relative;
  z-index: var(--z-raised);
  text-align: center;
  width: 100%;
  padding-block: var(--space-24);
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.hero__eyebrow::before,
.hero__eyebrow::after {
  content: '';
  display: block;
  width: 2rem;
  height: 1px;
  background-color: var(--color-accent);
  opacity: 0.5;
}

.hero__title {
  font-size: clamp(var(--text-4xl), 7vw, var(--text-6xl));
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

.hero__title-accent {
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  color: var(--color-text-secondary);
  max-width: 52ch;
  margin-inline: auto;
  margin-bottom: var(--space-10);
  line-height: var(--leading-relaxed);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

/* ============================================================
   Page Hero (interior pages)
   ============================================================ */

.page-hero {
  position: relative;
  padding-top: calc(var(--navbar-height) + var(--space-24));
  padding-bottom: var(--space-16);
  overflow: hidden;
}

.page-hero__bg {
  position: absolute;
  inset: 0;
  z-index: var(--z-base);
  pointer-events: none;
  background-image:
    linear-gradient(rgba(91, 110, 245, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 110, 245, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

.page-hero__content {
  position: relative;
  z-index: var(--z-raised);
  max-width: 62ch;
}

.page-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}

.page-hero__title {
  font-size: clamp(var(--text-4xl), 6vw, var(--text-5xl));
  margin-bottom: var(--space-5);
}

.page-hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 60ch;
}

/* ============================================================
   Sections (shared)
   ============================================================ */

.section {
  padding-block: var(--space-24);
}

.section--muted {
  background-color: var(--color-bg-elevated);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.section__title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-4xl));
  margin-bottom: var(--space-4);
}

.section__description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 56ch;
  margin-inline: auto;
}

/* ============================================================
   Card (generic)
   ============================================================ */

.card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base);
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background-color: var(--color-accent-dim);
  border-radius: var(--radius-lg);
  color: var(--color-accent);
  margin-bottom: var(--space-5);
}

.card__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.card__text {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: none;
}

/* ============================================================
   Features Grid
   ============================================================ */

.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================================
   Prose (long-form text content)
   ============================================================ */

.prose {
  max-width: 68ch;
  color: var(--color-text-secondary);
}

.prose p {
  max-width: none;
  margin-bottom: var(--space-5);
  line-height: var(--leading-relaxed);
}

.prose p:last-child {
  margin-bottom: 0;
}

.prose strong {
  color: var(--color-text-primary);
  font-weight: var(--weight-semibold);
}

/* ============================================================
   Team
   ============================================================ */

.team-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-8);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.team-card__avatar {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 6rem;
  height: 6rem;
  border-radius: var(--radius-full);
  background-color: var(--color-accent-dim);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
}

.team-card__body {
  flex: 1;
  min-width: 240px;
}

.team-card__name {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.team-card__role {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.team-card__text {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 60ch;
}

/* ============================================================
   Badge
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background-color: var(--color-accent-dim);
  color: var(--color-accent-hover);
  border: 1px solid rgba(91, 110, 245, 0.3);
}

.badge--muted {
  background-color: var(--color-bg-muted);
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

/* ============================================================
   Product Cards
   ============================================================ */

.product-category {
  margin-bottom: var(--space-16);
}

.product-category:last-child {
  margin-bottom: 0;
}

.product-category__title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base);
}

.product-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.product-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.product-card__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.product-card__text {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
}

.product-card__specs {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border-subtle);
}

.product-card__spec {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.product-card__spec::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 0.5em;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
}

.product-card__footer {
  margin-top: auto;
}

/* ============================================================
   Steps (process explainer)
   ============================================================ */

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.step {
  position: relative;
  padding-top: var(--space-6);
  border-top: 2px solid var(--color-border);
}

.step__number {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-accent);
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-3);
}

.step__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.step__text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ============================================================
   Contact
   ============================================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 2fr 3fr;
  }
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.contact-item__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2.75rem;
  height: 2.75rem;
  background-color: var(--color-accent-dim);
  border-radius: var(--radius-lg);
  color: var(--color-accent);
}

.contact-item__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}

.contact-item__value {
  color: var(--color-text-primary);
  font-weight: var(--weight-medium);
  transition: color var(--transition-fast);
}

a.contact-item__value:hover {
  color: var(--color-accent-hover);
}

/* ============================================================
   Forms
   ============================================================ */

.form {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .form__row--split {
    grid-template-columns: 1fr 1fr;
  }
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.form__input,
.form__textarea {
  width: 100%;
  background-color: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--color-text-muted);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-dim);
}

.form__textarea {
  resize: vertical;
  min-height: 140px;
}

/* ============================================================
   Blog
   ============================================================ */

.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.state-message {
  text-align: center;
  padding-block: var(--space-16);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

.state-message--error {
  color: var(--color-error);
}

@media (min-width: 768px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.blog-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base);
}

.blog-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.blog-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-8);
}

.blog-card__date {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.blog-card__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.blog-card__excerpt {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  flex: 1;
}

.blog-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.blog-card__link:hover {
  color: var(--color-accent-hover);
  gap: var(--space-3);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}

.post-body {
  padding-block: var(--space-16);
}

.post-body h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.post-body h2:first-child {
  margin-top: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--color-accent);
}

/* ============================================================
   Footer
   ============================================================ */

.footer {
  background-color: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

@media (min-width: 640px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-16);
  }
}

.footer__logo {
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-4);
}

.footer__logo-mark {
  font-family: var(--font-mono);
  color: var(--color-accent);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 30ch;
  line-height: var(--leading-relaxed);
}

.footer__col-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-text-primary);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-subtle);
}

@media (min-width: 640px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer__social {
  display: flex;
  gap: var(--space-4);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-subtle);
  transition: color var(--transition-fast),
              border-color var(--transition-fast),
              background-color var(--transition-fast);
}

.footer__social-link:hover {
  color: var(--color-text-primary);
  border-color: var(--color-border);
  background-color: var(--color-bg-muted);
}

/* ============================================================
   Divider
   ============================================================ */

.divider {
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--color-border) 20%,
    var(--color-border) 80%,
    transparent
  );
  border: none;
  margin-block: var(--space-16);
}

/* ============================================================
   Focus / Accessibility
   ============================================================ */

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

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

/* ============================================================
   Scrollbar
   ============================================================ */

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-muted);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border);
}

/* ============================================================
   Selection
   ============================================================ */

::selection {
  background-color: rgba(91, 110, 245, 0.3);
  color: var(--color-text-primary);
}