/* ============================================================
   CLAWSTAINER — Minimal Dark
   Clean dark background, monospace headings, neutral palette
   with a single accent. Vercel/Linear-inspired.
   ============================================================ */

/* --- Type Scale --- */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.8125rem);
  --text-sm:   clamp(0.8125rem, 0.78rem + 0.2vw, 0.9375rem);
  --text-base: clamp(0.9375rem, 0.9rem  + 0.2vw, 1.0625rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.65vw, 1.375rem);
  --text-xl:   clamp(1.375rem, 1.1rem  + 1.1vw,  2rem);
  --text-2xl:  clamp(1.75rem,  1.1rem  + 2.2vw,  3rem);
}

/* --- Spacing (4px base) --- */
:root {
  --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;
}

/* --- Color Palette: Minimal Dark --- */
:root {
  --color-bg:              #09090b;
  --color-surface:         #111113;
  --color-surface-2:       #18181b;
  --color-border:          rgba(255, 255, 255, 0.08);
  --color-divider:         rgba(255, 255, 255, 0.05);

  --color-text:            #ededef;
  --color-text-secondary:  #a0a0a8;
  --color-text-muted:      #63636e;

  --color-primary:         #56afbe;
  --color-primary-light:   #7ec8d4;
  --color-primary-muted:   rgba(86, 175, 190, 0.15);

  /* terminal (stays dark in both themes) */
  --terminal-bg:           #111113;
  --terminal-surface:      rgba(255, 255, 255, 0.02);
  --terminal-border:       rgba(255, 255, 255, 0.08);
  --terminal-text:         #d4d4d4;
  --terminal-muted:        #63636e;

  /* syntax highlighting only */
  --color-syntax-flag:     #c4845c;
  --color-syntax-string:   #5dba72;
  --color-syntax-comment:  #505060;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --transition-fast: 150ms ease;

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1100px;

  --font-display: 'DM Sans', 'Inter', -apple-system, system-ui, sans-serif;
  --font-body: 'DM Sans', 'Inter', -apple-system, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* --- No background grid — solid color --- */
body {
  background: var(--color-bg);
}

/* ============================================================
   UTILITY
   ============================================================ */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.annotation {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
}

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: var(--space-4) 0;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 450;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-text);
}

/* Hamburger / mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--space-2);
  -webkit-tap-highlight-color: transparent;
}

.menu-toggle svg {
  display: block;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-bg);
  background: var(--color-text);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: opacity var(--transition-fast),
              transform var(--transition-fast);
}

.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color var(--transition-fast),
              color var(--transition-fast),
              transform var(--transition-fast);
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--color-text);
  transform: translateY(-1px);
}

.btn-ghost:active {
  transform: translateY(0);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: clamp(var(--space-16), 12vw, var(--space-32)) 0 clamp(var(--space-12), 8vw, var(--space-24));
  text-align: left;
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-4);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.15;
  max-width: 20ch;
  margin-bottom: var(--space-5);
  letter-spacing: -0.02em;
}

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

.hero-sub {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text-secondary);
  max-width: 52ch;
  line-height: 1.55;
  margin-bottom: var(--space-6);
}

.hero-install {
  margin-bottom: var(--space-6);
}

.install-cmd {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--terminal-text);
  background: var(--terminal-bg);
  border: 1px solid var(--terminal-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
}

.install-prompt {
  color: var(--terminal-muted);
  user-select: none;
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  flex-wrap: wrap;
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  padding: clamp(var(--space-12), 7vw, var(--space-20)) 0;
  position: relative;
}

.section-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-divider);
}

.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  max-width: 56ch;
  margin-bottom: var(--space-10);
}

/* ============================================================
   HOW IT WORKS — Two-column with animated terminal
   ============================================================ */
.how-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .how-layout {
    grid-template-columns: 1fr 1.3fr;
    gap: var(--space-10);
    align-items: start;
  }
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.how-step {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  border-left: 2px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease, opacity 0.3s ease;
  opacity: 0.45;
}

.how-step--active {
  border-left-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.02);
  opacity: 1;
}

.how-step h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.how-step p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.how-terminal-wrap {
  position: sticky;
  top: calc(60px + var(--space-6));
  min-width: 0;
}

.how-steps {
  min-width: 0;
}

/* Animated terminal lines */
.term-line {
  transition: opacity 0.25s ease;
  min-height: 1.7em;
}

.term-blank {
  height: 0.85em;
}

.term-typed {
  color: var(--terminal-text);
}

/* ============================================================
   TERMINAL / CODE BLOCKS
   ============================================================ */
.terminal {
  background: var(--terminal-bg);
  border: 1px solid var(--terminal-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-3) var(--space-4);
  background: var(--terminal-surface);
  border-bottom: 1px solid var(--terminal-border);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--terminal-muted);
  opacity: 0.3;
}

.terminal-dot:nth-child(1) { background: #f87171; opacity: 0.6; }
.terminal-dot:nth-child(2) { background: #fbbf24; opacity: 0.6; }
.terminal-dot:nth-child(3) { background: #4ade80; opacity: 0.6; }

.terminal-title {
  font-size: var(--text-xs);
  color: var(--terminal-muted);
  margin-left: var(--space-2);
}

.terminal-body {
  padding: var(--space-4) var(--space-5);
  overflow-x: auto;
}

.terminal-body code {
  color: var(--terminal-text);
  white-space: pre;
}

.terminal-body .prompt {
  color: var(--terminal-muted);
  user-select: none;
}

.terminal-body .comment {
  color: var(--color-syntax-comment);
}

.terminal-body .flag {
  color: var(--color-syntax-flag);
}

.terminal-body .string {
  color: var(--color-syntax-string);
}

/* ============================================================
   USE CASE BLOCKS — Full-width alternating sections
   ============================================================ */
.uc-block {
  padding: clamp(var(--space-10), 6vw, var(--space-16)) 0;
  border-top: 1px solid var(--color-divider);
}

.uc-block--alt {
  background: var(--color-surface);
}

.uc-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.uc-number {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text-muted);
  opacity: 0.2;
  line-height: 1;
}

.use-case {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: start;
  min-width: 0;
}

.use-case-text,
.use-case-terminal {
  min-width: 0;
}

@media (min-width: 768px) {
  .use-case {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
    align-items: center;
  }

  .use-case--reverse .use-case-text {
    order: 2;
  }

  .use-case--reverse .use-case-terminal {
    order: 1;
  }
}

.use-case-tag {
  display: inline-block;
  padding: 3px var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  letter-spacing: 0.04em;
}

.use-case-text h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.use-case-text p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-3);
  overflow-wrap: break-word;
}

.use-case-detail {
  font-size: var(--text-sm) !important;
  color: var(--color-text-muted) !important;
}

/* ============================================================
   AGENT-POWERED SPLIT SECTION
   ============================================================ */
.agent-split {
  border-top: 1px solid var(--color-border);
}

.agent-split-top {
  background: var(--color-bg);
  padding: var(--space-16) 0 var(--space-12);
}

.agent-split-heading {
  margin-bottom: var(--space-10);
}

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

@media (min-width: 640px) {
  .agent-split-points {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }
}

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

.agent-point-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

.agent-point p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin: 0;
}

.agent-point p strong {
  color: var(--color-text);
  font-weight: 600;
}

/* Dark bottom half */
.agent-split-bottom {
  background: var(--terminal-bg);
  padding: var(--space-10) 0 var(--space-12);
}

.agent-terminal-full {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Branded panel header */
.agent-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--terminal-surface);
  border: 1px solid var(--terminal-border);
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.agent-panel-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.agent-panel-brand svg {
  color: var(--color-primary);
}

.agent-panel-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: -0.01em;
}

.agent-panel-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.agent-panel-live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34D399;
  animation: pulse-live 2s ease-in-out infinite;
}

@keyframes pulse-live {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.agent-panel-live-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #34D399;
}

/* Agent chat conversation UI */
.agent-chat {
  padding: var(--space-6) var(--space-5);
  background: var(--terminal-surface);
  border: 1px solid var(--terminal-border);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  min-height: 320px;
}

.achat-hidden {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.achat-visible {
  opacity: 1;
  transform: translateY(0);
}

.achat-msg {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  line-height: 1.6;
}

.achat-role {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  width: 20px;
  text-align: center;
  line-height: 1.6;
}

.achat-user .achat-role {
  color: var(--color-primary-light);
}

.achat-agent .achat-role {
  color: var(--color-syntax-string);
}

.achat-user .achat-text {
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
}

.achat-agent .achat-text {
  color: rgba(255, 255, 255, 0.75);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}

.achat-action {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  margin-left: 32px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--terminal-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  overflow-x: auto;
}

.achat-action-label {
  flex-shrink: 0;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary-light);
  background: rgba(86, 175, 190, 0.12);
  padding: 2px 8px;
  border-radius: 3px;
}

.achat-action-cmd {
  color: var(--terminal-muted);
  white-space: nowrap;
}

.achat-result {
  margin-left: 32px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-syntax-string);
  padding-left: var(--space-4);
}

.achat-check {
  margin-right: var(--space-1);
}

/* Typing indicator */
.achat-typing {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 0;
}

.achat-typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--terminal-muted);
  animation: typing-bounce 1.2s ease-in-out infinite;
}

.achat-typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.achat-typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes typing-bounce {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}

@media (max-width: 639px) {
  .achat-action {
    margin-left: 0;
    font-size: 0.72rem;
  }

  .achat-result {
    margin-left: 0;
  }

  .agent-chat {
    padding: var(--space-5) var(--space-4);
    gap: var(--space-4);
    min-height: 280px;
  }
}

/* ============================================================
   FLEET
   ============================================================ */
.fleet-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.fleet-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

@media (min-width: 768px) {
  .fleet-layout {
    grid-template-columns: 1fr 1.2fr;
    align-items: start;
  }
}

.fleet-text {
  min-width: 0;
}

.fleet-terminals {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 0;
}

/* ============================================================
   FEATURE PILLARS — 3-column cards
   ============================================================ */
.pillars-section {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

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

@media (min-width: 768px) {
  .pillars-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
}

.pillar-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
}

.pillar-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.25;
  margin-bottom: var(--space-3);
}

.pillar-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.pillar-card p code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-text);
  background: var(--color-primary-muted);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
}

.pillar-visual {
  margin-top: auto;
}

.pillar-svg {
  width: 100%;
  height: auto;
  display: block;
}

/* ============================================================
   CONTACT STRIP
   ============================================================ */
.contact-strip {
  background: var(--terminal-bg);
  padding: 0;
}

.contact-hero {
  text-align: center;
  padding: var(--space-16) var(--space-6) var(--space-10);
  border-bottom: 1px solid var(--terminal-border);
}

.contact-headline {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.4rem + 2.5vw, 3.25rem);
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.1;
  letter-spacing: -0.025em;
  display: block;
}

.contact-sub {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--terminal-muted);
  margin-top: var(--space-4);
  text-align: center;
  max-width: none;
  margin-inline: auto;
}

.contact-actions {
  display: grid;
  grid-template-columns: 1fr;
}

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

.contact-action-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-8) var(--space-6);
  text-decoration: none;
  border-bottom: 1px solid var(--terminal-border);
  transition: background var(--transition-fast);
  position: relative;
}

@media (min-width: 640px) {
  .contact-action-card {
    border-bottom: none;
  }

  .contact-action-card:first-child {
    border-right: 1px solid var(--terminal-border);
  }
}

.contact-action-card:hover {
  background: rgba(255, 255, 255, 0.04);
}

.contact-action-label {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: #FFFFFF;
}

.contact-action-desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--terminal-muted);
  line-height: 1.5;
}

.contact-arrow {
  position: absolute;
  top: var(--space-8);
  right: var(--space-6);
  color: var(--terminal-muted);
  opacity: 0.5;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.contact-action-card:hover .contact-arrow {
  opacity: 1;
  color: var(--color-primary);
  transform: translateX(4px);
}

/* --- Contact form --- */
.contact-form-wrap {
  border-top: 1px solid var(--terminal-border);
  padding: var(--space-10) 0;
}

.contact-form-wrap[hidden] {
  display: none;
}

.contact-form {
  max-width: 640px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

@media (max-width: 520px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.form-group label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.form-group input,
.form-group textarea {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: #FFFFFF;
  background: var(--terminal-surface);
  border: 1px solid var(--terminal-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  transition: border-color var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--terminal-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.contact-form .btn-primary {
  margin-top: var(--space-2);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
}

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

.footer-text {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.footer-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text);
}

/* ============================================================
   SCROLL REVEALS
   ============================================================ */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* ============================================================
   BLOG INDEX
   ============================================================ */
.blog-header {
  padding: clamp(var(--space-12), 8vw, var(--space-20)) 0 var(--space-8);
}

.blog-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.blog-header p {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
}

.blog-list {
  padding-bottom: clamp(var(--space-16), 8vw, var(--space-24));
}

.blog-entry {
  display: block;
  text-decoration: none;
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--color-divider);
  transition: background var(--transition-fast);
}

.blog-entry:first-child {
  border-top: 1px solid var(--color-divider);
}

.blog-entry:hover {
  background: rgba(255, 255, 255, 0.01);
}

.blog-entry-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.blog-entry-date {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.blog-entry-tag {
  display: inline-block;
  padding: 2px var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  letter-spacing: 0.04em;
}

.blog-entry h2 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  transition: color var(--transition-fast);
}

.blog-entry:hover h2 {
  color: var(--color-text-secondary);
}

.blog-entry p {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: 1.6;
  max-width: 64ch;
}

/* ============================================================
   BLOG POST — Article layout
   ============================================================ */
.post-header {
  padding: clamp(var(--space-12), 8vw, var(--space-20)) 0 var(--space-8);
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.post-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: var(--space-8);
  letter-spacing: 0.04em;
  transition: color var(--transition-fast);
}

.post-back:hover {
  color: var(--color-text);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.post-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.15;
  max-width: 24ch;
  letter-spacing: -0.02em;
}

/* --- Article body --- */
.post-body {
  max-width: var(--content-default);
  margin-inline: auto;
  padding: 0 var(--space-6) clamp(var(--space-16), 8vw, var(--space-24));
}

.post-body h2 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.post-body h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.post-body h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.post-body p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-5);
  max-width: 72ch;
}

.post-body a {
  color: var(--color-primary);
  text-decoration-color: rgba(86, 175, 190, 0.3);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast);
}

.post-body a:hover {
  text-decoration-color: var(--color-primary);
}

.post-body strong {
  color: var(--color-text);
  font-weight: 600;
}

.post-body em {
  color: var(--color-text-secondary);
  font-style: italic;
}

.post-body ul, .post-body ol {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: 1.7;
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
}

.post-body li {
  margin-bottom: var(--space-2);
}

.post-body li::marker {
  color: var(--color-text-muted);
}

.post-body hr {
  border: none;
  height: 1px;
  background: var(--color-divider);
  margin: var(--space-10) 0;
}

/* --- Code blocks in articles --- */
.post-body pre {
  background: var(--terminal-bg);
  border: 1px solid var(--terminal-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.post-body pre code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--terminal-text);
  line-height: 1.7;
  white-space: pre;
}

.post-body p code,
.post-body li code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
}

/* --- ASCII diagram block --- */
.post-body .diagram {
  background: var(--terminal-bg);
  border: 1px solid var(--terminal-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--terminal-text);
  line-height: 1.5;
  white-space: pre;
}

/* --- Tables in articles --- */
.post-body .table-wrap {
  overflow-x: auto;
  margin-bottom: var(--space-5);
  -webkit-overflow-scrolling: touch;
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.post-body th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.post-body td {
  color: var(--color-text-secondary);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  vertical-align: top;
}

.post-body tr:last-child td {
  border-bottom: none;
}

/* --- Post footer links --- */
.post-footer-links {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-10);
}

.post-footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.post-footer-links a:hover {
  color: var(--color-text);
}

/* ============================================================
   LIGHT THEME
   ============================================================ */
[data-theme="light"] {
  --color-bg:              #F7F6F2;
  --color-surface:         #FFFFFF;
  --color-surface-2:       #F0EFE9;
  --color-border:          #E5E5E5;
  --color-divider:         #E5E5E5;

  --color-text:            #1A1A1A;
  --color-text-secondary:  #333333;
  --color-text-muted:      #5A5A5A;

  --color-primary:         #2E7CF6;
  --color-primary-light:   #4A9EF5;
  --color-primary-muted:   rgba(46, 124, 246, 0.10);

  --terminal-bg:           #1A1A1A;
  --terminal-surface:      #242424;
  --terminal-border:       #333333;
  --terminal-text:         #D4D4D4;
  --terminal-muted:        #7A7A7A;
  --color-syntax-comment:  #6A6A6A;
}

/* Auto-detect system preference when no explicit theme is set */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --color-bg:              #F7F6F2;
    --color-surface:         #FFFFFF;
    --color-surface-2:       #F0EFE9;
    --color-border:          #E5E5E5;
    --color-divider:         #E5E5E5;

    --color-text:            #1A1A1A;
    --color-text-secondary:  #333333;
    --color-text-muted:      #5A5A5A;

    --color-primary:         #2E7CF6;
    --color-primary-light:   #4A9EF5;
    --color-primary-muted:   rgba(46, 124, 246, 0.10);

    --terminal-bg:           #1A1A1A;
    --terminal-surface:      #242424;
    --terminal-border:       #333333;
    --terminal-text:         #D4D4D4;
    --terminal-muted:        #7A7A7A;
    --color-syntax-comment:  #6A6A6A;

    --font-display: 'DM Sans', 'Inter', -apple-system, system-ui, sans-serif;
    --font-body:    'DM Sans', 'Inter', -apple-system, system-ui, sans-serif;
  }
}

/* --- Light theme component overrides --- */
[data-theme="light"] .site-header {
  background: rgba(247, 246, 242, 0.85);
}

[data-theme="light"] .btn-primary {
  color: #FFFFFF;
  background: var(--color-primary);
  font-family: var(--font-body);
}

[data-theme="light"] .btn-ghost {
  font-family: var(--font-body);
}

[data-theme="light"] .btn-ghost:hover {
  border-color: var(--color-text-muted);
}

[data-theme="light"] .how-step {
  opacity: 0.7;
}

[data-theme="light"] .how-step--active {
  background: var(--color-primary-muted);
}

[data-theme="light"] .how-step h3 {
  font-weight: 600;
}

[data-theme="light"] .use-case-tag {
  background: var(--color-primary-muted);
}

[data-theme="light"] .use-case-text h3 {
  font-weight: 600;
}

[data-theme="light"] .hero h1 {
  font-weight: 700;
}

[data-theme="light"] .hero-kicker {
  font-size: var(--text-sm);
}

[data-theme="light"] .section-heading {
  font-weight: 700;
}

[data-theme="light"] .nav-links a {
  font-weight: 500;
}

[data-theme="light"] .uc-number {
  font-family: var(--font-display);
  font-weight: 700;
  opacity: 0.15;
}

[data-theme="light"] .footer-text {
  font-family: var(--font-body);
}

[data-theme="light"] .blog-entry:hover {
  background: rgba(46, 124, 246, 0.03);
}

[data-theme="light"] .blog-entry:hover h2 {
  color: var(--color-primary);
}

[data-theme="light"] .blog-entry h2 {
  font-weight: 600;
}

[data-theme="light"] .post-body h2 {
  font-weight: 600;
}

[data-theme="light"] .post-body p code,
[data-theme="light"] .post-body li code {
  background: rgba(46, 124, 246, 0.08);
}

[data-theme="light"] .post-body a {
  text-decoration-color: rgba(46, 124, 246, 0.3);
}

[data-theme="light"] .post-footer-links a {
  color: var(--color-primary);
}

[data-theme="light"] .post-footer-links a:hover {
  color: #1B4DB3;
}

[data-theme="light"] .pillar-card h3 {
  font-weight: 700;
}

/* Logo icon: use blue shades in light mode */
[data-theme="light"] .logo-dots {
  color: #2E7CF6;
}

/* Theme toggle button */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Auto light preference */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .site-header {
    background: rgba(247, 246, 242, 0.85);
  }
  :root:not([data-theme="dark"]) .btn-primary {
    color: #FFFFFF;
    background: var(--color-primary);
    font-family: var(--font-body);
  }
  :root:not([data-theme="dark"]) .btn-ghost {
    font-family: var(--font-body);
  }
  :root:not([data-theme="dark"]) .btn-ghost:hover {
    border-color: var(--color-text-muted);
  }
  :root:not([data-theme="dark"]) .how-step {
    opacity: 0.7;
  }
  :root:not([data-theme="dark"]) .how-step--active {
    background: var(--color-primary-muted);
  }
  :root:not([data-theme="dark"]) .how-step h3 {
    font-weight: 600;
  }
  :root:not([data-theme="dark"]) .use-case-tag {
    background: var(--color-primary-muted);
  }
  :root:not([data-theme="dark"]) .use-case-text h3 {
    font-weight: 600;
  }
  :root:not([data-theme="dark"]) .hero h1 {
    font-weight: 700;
  }
  :root:not([data-theme="dark"]) .hero-kicker {
    font-size: var(--text-sm);
  }
  :root:not([data-theme="dark"]) .section-heading {
    font-weight: 700;
  }
  :root:not([data-theme="dark"]) .nav-links a {
    font-weight: 500;
  }
  :root:not([data-theme="dark"]) .uc-number {
    font-family: var(--font-display);
    font-weight: 700;
    opacity: 0.15;
  }
  :root:not([data-theme="dark"]) .footer-text {
    font-family: var(--font-body);
  }
  :root:not([data-theme="dark"]) .blog-entry:hover {
    background: rgba(46, 124, 246, 0.03);
  }
  :root:not([data-theme="dark"]) .blog-entry:hover h2 {
    color: var(--color-primary);
  }
  :root:not([data-theme="dark"]) .blog-entry h2 {
    font-weight: 600;
  }
  :root:not([data-theme="dark"]) .post-body h2 {
    font-weight: 600;
  }
  :root:not([data-theme="dark"]) .post-body p code,
  :root:not([data-theme="dark"]) .post-body li code {
    background: rgba(46, 124, 246, 0.08);
  }
  :root:not([data-theme="dark"]) .post-body a {
    text-decoration-color: rgba(46, 124, 246, 0.3);
  }
  :root:not([data-theme="dark"]) .post-footer-links a {
    color: var(--color-primary);
  }
  :root:not([data-theme="dark"]) .post-footer-links a:hover {
    color: #1B4DB3;
  }
  :root:not([data-theme="dark"]) .pillar-card h3 {
    font-weight: 700;
  }
  :root:not([data-theme="dark"]) .logo-dots {
    color: #2E7CF6;
  }
  :root:not([data-theme="dark"]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme="dark"]) .theme-toggle .icon-moon { display: none; }
}

/* ============================================================
   MOBILE
   ============================================================ */
@media (max-width: 767px) {
  .menu-toggle {
    display: block;
  }

  .site-header .container {
    flex-wrap: wrap;
  }

  .site-header nav {
    display: none;
    order: 4;
    width: 100%;
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-4);
  }

  .site-header nav.open {
    display: block;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) 0;
  }

  .nav-links li + li {
    border-top: 1px solid var(--color-border);
  }

  .nav-links a {
    display: block;
    padding: var(--space-3) var(--space-2);
  }

  /* Logo: scale down on narrow screens */
  .logo-group svg {
    max-width: 140px;
    height: auto;
  }

  .hero h1 {
    font-size: var(--text-xl);
  }

  .hero-sub {
    font-size: var(--text-base);
  }

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

  /* Install command: prevent overflow */
  .install-cmd {
    font-size: var(--text-sm);
    word-break: break-all;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .how-step {
    padding: var(--space-3) var(--space-4);
  }

  /* Disable sticky terminal on mobile — single-column layout doesn't need it */
  .how-terminal-wrap {
    position: static;
  }

  .terminal {
    font-size: var(--text-xs);
    max-width: 100%;
  }

  .terminal-body {
    padding: var(--space-3) var(--space-4);
  }

  .post-header h1 {
    font-size: var(--text-lg);
    max-width: none;
  }

  .post-body h2 {
    font-size: var(--text-base);
  }

  .post-body pre {
    font-size: var(--text-xs);
    padding: var(--space-4);
  }

  .post-body .diagram {
    font-size: 0.7rem;
    padding: var(--space-3);
  }

  .post-body .table-wrap {
    font-size: var(--text-xs);
  }

  .blog-entry h2 {
    font-size: var(--text-base);
  }

  .footer-links {
    gap: var(--space-4);
    flex-wrap: wrap;
  }

  .site-footer .container {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .use-case {
    gap: var(--space-5);
  }

  .fleet-layout {
    gap: var(--space-6);
  }

  .section-heading {
    font-size: var(--text-lg);
  }

  .pillar-card {
    padding: var(--space-6) var(--space-5);
  }

  .pillar-card h3 {
    font-size: var(--text-base);
  }

  .contact-hero {
    padding: var(--space-10) var(--space-4) var(--space-8);
  }

  .contact-action-card {
    padding: var(--space-6) var(--space-4);
  }

  .contact-action-label {
    font-size: var(--text-lg);
  }
}

/* Extra-small screens */
@media (max-width: 374px) {
  .container {
    padding-inline: var(--space-4);
  }

  .logo-group svg {
    max-width: 120px;
  }

  .hero h1 {
    font-size: clamp(1.25rem, 1rem + 1vw, 1.5rem);
  }

  .hero-kicker {
    font-size: var(--text-sm);
  }

  .install-cmd {
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-3);
  }

  .btn-primary,
  .btn-ghost {
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-4);
    width: 100%;
    justify-content: center;
  }

  .uc-header {
    gap: var(--space-2);
  }

  .uc-number {
    font-size: var(--text-lg);
  }

  .use-case-text h3 {
    font-size: var(--text-base);
  }

  .post-body {
    padding-inline: var(--space-4);
  }

  .post-header {
    padding-inline: var(--space-4);
  }
}