/* tatmantech.com — terminal / phosphor CRT theme */

:root {
  --bg:        #0b0f0d;
  --bg-panel:  #10160f;
  --fg:        #3ddc84;
  --fg-bright: #39ff14;
  --fg-dim:    #2a6b46;
  --accent:    #ff4d4d;
  --border:    rgba(61, 220, 132, 0.25);

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --space-12: 96px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas,
    "Liberation Mono", Menlo, monospace;
  font-size: 16px;
  line-height: 1.6;
  position: relative;
  min-height: 100vh;
}

/* --- CRT scanline overlay --- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background: repeating-linear-gradient(
    rgba(0, 0, 0, 0) 0px,
    rgba(0, 0, 0, 0) 1px,
    rgba(0, 0, 0, 0.12) 2px
  );
}

/* --- subtle vignette --- */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(
    ellipse at center,
    rgba(0, 0, 0, 0) 60%,
    rgba(0, 0, 0, 0.45) 100%
  );
}

main {
  position: relative;
  z-index: 3;
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-3) var(--space-12);
}

a {
  color: var(--fg-bright);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

a:hover,
a:focus-visible {
  text-shadow: 0 0 2px currentColor, 0 0 6px rgba(61, 220, 132, 0.35);
  border-bottom-color: var(--fg-bright);
}

/* --- jump nav --- */
.jump-nav {
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin-bottom: var(--space-8);
}

.jump-nav a {
  color: var(--fg);
  border-bottom: none;
}

.jump-nav a:hover,
.jump-nav a:focus-visible {
  color: var(--fg-bright);
}

/* --- sections --- */
section {
  margin-bottom: var(--space-12);
}

section:last-of-type {
  margin-bottom: var(--space-6);
}

h1, h2 {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-bright);
  text-shadow: 0 0 2px currentColor, 0 0 6px rgba(61, 220, 132, 0.35);
  margin: 0 0 var(--space-3);
}

h2 {
  font-size: 1.5rem;
}

h3 {
  color: var(--fg-bright);
  font-size: 1rem;
  margin: 0 0 var(--space-1);
}

.meta {
  font-size: 0.8rem;
  color: var(--fg-dim);
}

/* --- hero --- */
.hero .prompt {
  font-size: 1.1rem;
  color: var(--fg-bright);
  text-shadow: 0 0 2px currentColor, 0 0 6px rgba(61, 220, 132, 0.35);
  margin: 0 0 var(--space-2);
}

.hero .cursor {
  display: inline-block;
  width: 0.6em;
}

@media (prefers-reduced-motion: no-preference) {
  .hero .cursor {
    animation: blink 1s steps(1) infinite;
  }
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.hero .identity {
  margin: 0 0 var(--space-4);
}

.hero .positioning {
  font-style: italic;
  color: var(--fg);
  border-left: 2px solid var(--border);
  padding-left: var(--space-2);
  margin: 0;
}

.commentary {
  color: var(--fg-dim);
  font-size: 0.95rem;
  border-left: 2px solid var(--border);
  padding-left: var(--space-2);
  margin: var(--space-3) 0 var(--space-3) var(--space-2);
}

/* --- technique writeups --- */
.writeup {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
}

.writeup:last-child {
  margin-bottom: 0;
}

.writeup .label {
  display: block;
  font-size: 0.8rem;
  color: var(--fg-dim);
  margin-bottom: var(--space-2);
}

.writeup p {
  margin: 0 0 var(--space-2);
}

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

/* --- demo --- */
.demo-box {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: var(--space-3);
}

.demo-box label {
  display: block;
  font-size: 0.8rem;
  color: var(--fg-dim);
  margin-bottom: var(--space-1);
}

.demo-box textarea,
.demo-box select,
.demo-box button {
  width: 100%;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 0.95rem;
  padding: var(--space-1) var(--space-2);
  margin-bottom: var(--space-2);
}

.demo-box textarea {
  resize: vertical;
  min-height: 4.5em;
}

.demo-box button {
  cursor: pointer;
  color: var(--fg-bright);
  width: auto;
  padding: var(--space-1) var(--space-3);
}

.demo-box button:hover,
.demo-box button:focus-visible {
  background: rgba(61, 220, 132, 0.1);
}

.demo-box button:disabled {
  opacity: 0.5;
  cursor: default;
}

.demo-output {
  margin-top: var(--space-2);
  white-space: pre-wrap;
}

.demo-output .flag {
  color: var(--accent);
}

.demo-output .ok {
  color: var(--fg-bright);
}

.demo-output .status {
  color: var(--fg-dim);
}

/* --- contact --- */
.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.contact-list li {
  padding: var(--space-1) 0;
}

/* --- footer --- */
footer {
  font-size: 0.75rem;
  color: var(--fg-dim);
  text-align: center;
}

/* --- mobile --- */
@media (max-width: 480px) {
  main {
    padding: var(--space-4) var(--space-2) var(--space-8);
  }

  .jump-nav {
    line-height: 1.9;
  }
}