/* ============================================================
   Utpal Das — portfolio
   One continuous terminal session. No framework, no build step.
   ============================================================ */

:root {
  /* Tokyo Night — github.com/enkia/tokyo-night-vscode-theme */
  --bg: #1a1b26;
  --bg-raised: #24283b;
  --bg-raised-2: #292e42;
  --border: rgba(192, 202, 245, 0.1);
  --border-strong: rgba(192, 202, 245, 0.2);
  --text: #c0caf5;
  --text-dim: #a9b1d6;
  --accent: #7aa2f7;
  --accent-bright: #9db8fa;
  --accent-dim: #3d59a1;
  --accent-soft: rgba(122, 162, 247, 0.12);
  --ok: #9ece6a;

  --font-mono: ui-monospace, "JetBrains Mono", "Fira Code", "SFMono-Regular", Menlo, Consolas,
    "Liberation Mono", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --content-width: 920px;
  --edge: clamp(20px, 5vw, 64px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

/* JS-driven entrance/reveal states. .no-js is removed by script.js as its
   first statement; if JS never runs, this forces everything visible instead
   of leaving content stuck hidden. */
.hero .response > * {
  opacity: 0;
  transform: translateY(16px);
}

.no-js .hero .response > *,
.no-js .reveal {
  opacity: 1 !important;
  transform: none !important;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-mono);
  margin: 0;
  font-weight: 700;
  color: var(--text);
}

.dim {
  color: var(--text-dim);
}

/* ---------- titlebar ---------- */

.titlebar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(26, 27, 38, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.titlebar__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px var(--edge);
  display: flex;
  align-items: center;
  gap: 20px;
}

.titlebar__dots {
  display: flex;
  gap: 6px;
  flex: none;
}

.titlebar__dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-strong);
}

.titlebar__path {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.titlebar__nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 22px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.titlebar__nav a {
  color: var(--text-dim);
}

.titlebar__nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.titlebar__resume {
  border: 1px solid var(--accent-dim);
  border-radius: 4px;
  padding: 5px 10px;
  color: var(--accent) !important;
}

.titlebar__resume:hover {
  background: var(--accent-soft);
}

.titlebar__menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  margin-left: auto;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}

.titlebar__menu-btn span {
  width: 20px;
  height: 2px;
  background: var(--text);
  display: block;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 4px var(--edge) 18px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.mobile-nav a {
  color: var(--text-dim);
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.mobile-nav.is-open {
  display: flex;
}

@media (max-width: 720px) {
  .titlebar__nav {
    display: none;
  }
  .titlebar__menu-btn {
    display: flex;
  }
}

/* ---------- hero / terminal ---------- */

.hero {
  position: relative;
  overflow: hidden;
}

.hero__graph {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
  opacity: 0.65;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(64px, 12vh, 120px) var(--edge) 80px;
}

.term {
  font-family: var(--font-mono);
  max-width: var(--content-width);
}

.term__line {
  margin: 0 0 6px;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.term__line--gap {
  margin-top: 28px;
}

.prompt {
  color: var(--accent);
  margin-right: 6px;
}

.flag {
  color: var(--text-dim);
  font-weight: 400;
}

/* ---------- Claude Code vocabulary: prompt line, thinking, tool calls, todos ---------- */

.term__prompt-line {
  margin: 0 0 22px;
  font-size: 1rem;
  color: var(--text);
}

.chevron {
  color: var(--accent);
  font-weight: 700;
  margin-right: 8px;
}

.thinking {
  display: none;
  align-items: center;
  gap: 9px;
  margin: 0 0 22px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.thinking.is-active {
  display: flex;
}

.thinking__spinner {
  color: var(--accent);
  display: inline-block;
  width: 1em;
}

.tool-call {
  margin: 0 0 6px;
  font-size: 0.92rem;
  color: var(--text);
}

.bullet {
  color: var(--accent);
  margin-right: 6px;
}

.tool-name {
  color: var(--text);
  font-weight: 700;
}

.tool-result {
  margin: 0 0 18px;
  padding-left: 20px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.todo-list {
  margin: 2px 0 18px;
  padding-left: 20px;
}

.todo-item {
  position: relative;
  padding-left: 26px;
  font-family: var(--font-sans);
  font-size: clamp(1rem, 2vw, 1.05rem);
  margin: 5px 0;
  color: var(--text);
}

.todo-check {
  position: absolute;
  left: 0;
  top: 0;
  color: var(--ok);
  font-family: var(--font-mono);
}

.term__name {
  font-size: clamp(2.6rem, 8vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 4px 0 0;
}

.term__out {
  font-family: var(--font-sans);
  font-size: clamp(1rem, 2vw, 1.15rem);
  margin: 6px 0;
  max-width: 640px;
}

.term__out--dim {
  color: var(--text-dim);
}

.cursor {
  display: inline-block;
  color: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}

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

.term__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 11px 18px;
  color: var(--text);
  transition: border-color 0.15s ease, background 0.15s ease;
  will-change: transform;
}

.btn:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  text-decoration: none;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 700;
}

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

/* ---------- sections, reveal ---------- */

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 70px var(--edge);
  border-top: 1px solid var(--border);
}

.cmd-block {
  margin-bottom: 36px;
}

.cmd-block--tight {
  margin-top: 56px;
}

.cmd {
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  margin-bottom: 6px;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- timeline ---------- */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: var(--content-width);
}

.timeline__item {
  position: relative;
  padding: 0 0 40px 26px;
  border-left: 1px solid var(--border-strong);
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.timeline__client {
  color: var(--text-dim);
}

.timeline__item h3 {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.timeline__project {
  font-family: var(--font-mono);
  color: var(--text-dim);
  font-size: 0.88rem;
  margin: 0 0 12px;
}

.timeline__item ul {
  list-style: none;
  margin: 0;
  padding-left: 0;
}

.timeline__item li {
  position: relative;
  margin-bottom: 8px;
  padding-left: 22px;
  color: var(--text-dim);
}

.timeline__item li::before {
  content: "+";
  position: absolute;
  left: 2px;
  top: 0;
  color: var(--ok);
  font-family: var(--font-mono);
  font-weight: 700;
}

.timeline__item li strong {
  color: var(--text);
}

/* ---------- projects ---------- */

.subhead {
  margin: 48px 0 20px;
}

.subhead:first-of-type {
  margin-top: 0;
}

.dir {
  font-size: 1rem;
  color: var(--accent);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.badge {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 400;
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 3px 10px;
  letter-spacing: 0.01em;
}

.badge--live {
  color: var(--ok);
  border-color: rgba(158, 206, 106, 0.35);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

@media (max-width: 720px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  border-radius: 6px;
  padding: 22px 24px;
  transition: border-color 0.15s ease, background 0.15s ease;
  will-change: transform;
}

.card:hover {
  border-left-color: var(--accent);
  background: var(--bg-raised-2);
}

.no-js .card:hover {
  transform: translateY(-2px);
}

.card h4 {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.card__client {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.8rem;
  margin: 0 0 10px;
}

.card p {
  margin: 0 0 12px;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.card__tags {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  opacity: 0.8;
}

.card__links {
  display: flex;
  gap: 16px;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ---------- skills / json block ---------- */

.json-block {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.9;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 24px 26px;
  color: var(--text-dim);
  max-width: var(--content-width);
}

.json-block code {
  display: block;
  white-space: pre-wrap;
  word-break: break-word;
}

.json-block .key {
  color: var(--accent);
}

.json-block .str {
  color: var(--text);
}

.json-block .punc {
  color: var(--text-dim);
}

.credentials {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-top: 20px;
  max-width: var(--content-width);
}

@media (max-width: 620px) {
  .credentials {
    grid-template-columns: 1fr;
  }
}

.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}

.plain-list li {
  padding: 8px 0;
  border-top: 1px solid var(--border);
}

.plain-list li:first-child {
  border-top: none;
}

/* ---------- contact ---------- */

.section--contact {
  padding-bottom: 100px;
}

.contact__lede {
  max-width: 560px;
  color: var(--text-dim);
  font-size: 1.05rem;
}

.contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  margin-top: 28px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.contact__link {
  color: var(--text);
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 2px;
}

.contact__link:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--border);
  padding: 26px var(--edge) 40px;
  max-width: 1100px;
  margin: 0 auto;
  margin-bottom: 76px;
}

.footer p {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  margin: 0;
}

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

/* ---------- command bar ---------- */

.cmdbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  padding: 14px var(--edge) 16px;
  background: linear-gradient(to top, var(--bg) 55%, transparent);
}

.cmdbar__response {
  max-width: 700px;
  margin: 0 auto 8px;
  padding: 0 4px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  min-height: 1.2em;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.cmdbar__response.is-visible {
  opacity: 1;
}

.cmdbar__row {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-raised);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 12px 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.cmdbar__row:focus-within {
  border-color: var(--accent);
}

.cmdbar__prompt {
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
  flex: none;
}

.cmdbar__input {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  background: none;
  border: 0;
  outline: 0;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.92rem;
}

.cmdbar__input::placeholder {
  color: var(--text-dim);
}

.cmdbar__hint {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 2px 6px;
}

@media (max-width: 640px) {
  .cmdbar__hint {
    display: none;
  }
}