/* ============================================================
   ZRUN — Page Stylesheet
   Aesthetic: Terminal · Scripts · Fast · Organised
   Deep dark base · Crisp green accent · Sharp geometry
   ============================================================ */

:root {
  --color-bg: #0a100c;
  --color-bg-elevated: #0e1610;
  --color-bg-terminal: #070d08;
  --color-grid-line: rgba(80, 200, 100, 0.04);
  --color-grid-line-strong: rgba(80, 200, 100, 0.08);

  --color-border: rgba(80, 200, 100, 0.1);
  --color-border-strong: rgba(80, 200, 100, 0.22);

  --color-text: #e0f0e4;
  --color-text-muted: #4a7055;
  --color-text-faint: #1a2e1e;

  /* --- zrun accents --- */
  --color-green: #50c864;
  --color-green-bright: #68d87a;
  --color-green-ink: #011008;
  --color-green-dim: rgba(80, 200, 100, 0.12);

  --color-green-muted: #2a6838;
  --color-green-muted-dim: rgba(42, 104, 56, 0.1);

  /* --- Terminal colours --- */
  --color-term-prompt: #50c864;
  --color-term-path: #2a6838;
  --color-term-sep: #1a2e1e;
  --color-term-cmd: #e0f0e4;
  --color-term-out: #2e5035;
  --color-term-cursor: #50c864;
  --color-term-string: #88d898;
  --color-term-comment: #1e3822;

  /* --- TUI chrome colours --- */
  --color-tui-header: #50c864;
  --color-tui-selected-bg: rgba(80, 200, 100, 0.14);
  --color-tui-selected-text: #e0f0e4;
  --color-tui-run: #2a6838;
  --color-tui-tag: #1e3822;
  --color-tui-footer: #1a2e1e;
  --color-tui-preview: #50c864;

  /* --- Typography --- */
  --font-display: "Space Grotesk", "Arial Black", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* --- Spacing --- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  --radius: 2px;
  --header-height: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-mono);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  background-image:
    linear-gradient(var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(var(--color-grid-line-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-line-strong) 1px, transparent 1px);
  background-size: 20px 20px, 20px 20px, 100px 100px, 100px 100px;
  background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ============================================================
   NAVBAR
   ============================================================ */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(10, 16, 12, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.navbar__inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

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

.navbar__logo { width: 32px; height: 32px; object-fit: contain; }

.navbar__wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.navbar__wordmark span { color: var(--color-green); }

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.navbar__link {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.navbar__link:hover { color: var(--color-green); }

.navbar__tag {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  border: 1px solid var(--color-border);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius);
}

.navbar__tag span { color: var(--color-green); }

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-green);
  color: var(--color-green-ink);
  border-color: var(--color-green);
}

.btn--primary:hover {
  background: var(--color-green-bright);
  border-color: var(--color-green-bright);
}

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

.btn--outline:hover {
  border-color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  position: relative;
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.hero__inner {
  padding: var(--space-24) 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero__label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-green);
  margin-bottom: var(--space-6);
}

.hero__label::before {
  content: "";
  display: block;
  width: 28px;
  height: 1px;
  background: var(--color-green);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-6);
}

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

.hero__subtitle {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  max-width: 44ch;
  margin-bottom: var(--space-8);
}

.hero__subtitle code {
  color: var(--color-green);
  background: var(--color-green-dim);
  padding: 1px 5px;
  border-radius: var(--radius);
  font-size: 0.88em;
}

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

.coord-readout {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  pointer-events: none;
  z-index: 2;
}

.coord-readout span { color: var(--color-green); }

/* ============================================================
   TERMINAL
   ============================================================ */

.hero__terminal {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-terminal);
  overflow: hidden;
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
}

.terminal__bar-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-text-faint);
  opacity: 0.5;
}

.terminal__bar-title {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-left: var(--space-2);
}

.terminal__body {
  padding: var(--space-4) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 2px;
  height: 300px;
  overflow: hidden;
}

.terminal__body--tall {
  height: auto;
  overflow: visible;
  padding: var(--space-6);
  gap: var(--space-1);
}

.terminal__body--flat {
  height: unset;
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-terminal);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.terminal__line {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  white-space: pre;
}

.terminal__spacer { height: 6px; }

.terminal__prompt { color: var(--color-term-prompt); font-weight: 600; }
.terminal__sep    { color: var(--color-term-sep); }
.terminal__path   { color: var(--color-term-path); }
.terminal__cmd    { color: var(--color-term-cmd); }
.terminal__out    { color: var(--color-term-out); }
.terminal__string { color: var(--color-term-string); }
.terminal__comment { color: var(--color-term-comment); }

.terminal__out--muted {
  color: var(--color-text-faint);
  font-style: italic;
}

.terminal__cursor {
  color: var(--color-term-cursor);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* TUI chrome inside terminal */
.terminal__ui-header {
  color: var(--color-tui-header);
  font-weight: 700;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 4px;
  letter-spacing: 0.06em;
}

.terminal__ui-row {
  color: var(--color-text-muted);
  padding: 1px 0;
}

.terminal__ui-row--selected {
  color: var(--color-tui-selected-text);
  background: var(--color-tui-selected-bg);
  border-radius: 1px;
  padding: 2px 4px;
  margin: 0 -4px;
}

.terminal__ui-tag {
  color: var(--color-green);
  font-size: 0.72rem;
}

.terminal__ui-tag-muted {
  color: var(--color-text-faint);
  font-size: 0.72rem;
}

.terminal__ui-run {
  color: var(--color-tui-run);
  font-size: 0.72rem;
}

.terminal__ui-preview {
  color: var(--color-tui-preview);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-top: 1px solid var(--color-border);
  padding-top: 4px;
}

.terminal__ui-code {
  color: var(--color-term-out);
  font-size: 0.78rem;
}

.terminal__ui-footer {
  color: var(--color-tui-footer);
  font-size: 0.68rem;
  border-top: 1px solid var(--color-border);
  padding-top: 4px;
  margin-top: auto;
}

/* ============================================================
   SECTIONS
   ============================================================ */

.section {
  padding: var(--space-24) 0;
  border-bottom: 1px solid var(--color-border);
}

.section__label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-green);
  margin-bottom: var(--space-4);
}

.section__label::before {
  content: "";
  display: block;
  width: 28px;
  height: 1px;
  background: var(--color-green);
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
}

.section__subtitle {
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-12);
}

.section__subtitle code {
  color: var(--color-green);
  background: var(--color-green-dim);
  padding: 1px 5px;
  border-radius: var(--radius);
  font-size: 0.88em;
}

/* ============================================================
   FEATURE GRID
   ============================================================ */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.feature-card {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-elevated);
  transition: border-color 0.15s ease;
}

.feature-card:hover { border-color: var(--color-green); }

.feature-card__num {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.feature-card__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.feature-card__body {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.feature-card__body code {
  color: var(--color-green);
  background: var(--color-green-dim);
  padding: 1px 5px;
  border-radius: var(--radius);
  font-size: 0.78rem;
}

/* ============================================================
   SCRIPT LEGEND
   ============================================================ */

.script-legend {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.legend-row {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
}

.legend-row:last-child { border-bottom: none; }

.legend-key {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-green);
  font-weight: 600;
  min-width: 200px;
  flex-shrink: 0;
}

.legend-desc {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1100px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .hero__inner {
    grid-template-columns: 1fr;
    padding: var(--space-16) 0;
  }

  .feature-grid { grid-template-columns: 1fr; }

  .legend-row { flex-direction: column; gap: var(--space-1); }

  .navbar__nav { display: none; }
  .navbar__tag { display: none; }
}