/* ==========================================================================
   Surya Devarabhotla — Portfolio
   Design concept: "Systems Console" — amber phosphor CRT terminal.
   Content rendered as real terminal output: systemctl status, tailed
   logs, curl responses. Monospace throughout is a deliberate, coherent
   constraint here, not a compromise.
   ========================================================================== */

:root {
  --bg: #0a0904;
  --panel: #120f08;
  --panel-2: #17130a;
  --border: rgba(255, 176, 0, 0.22);
  --border-strong: rgba(255, 176, 0, 0.42);

  --amber: #ffc562;
  --amber-bright: #ffe3ab;
  --amber-dim: #b9863c;
  --amber-faint: #6b5127;

  --green: #3ddc72;
  --red: #ff5f56;
  --yellow: #ffbd2e;
  --cyan: #6fd4c9;

  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", monospace;
  --font-display: "VT323", var(--font-mono);

  --max-w: 980px;
  --gutter: clamp(1rem, 4vw, 2.4rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@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(--amber);
  font-family: var(--font-mono);
  font-size: 15.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  position: relative;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Scanlines + vignette overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.18) 0px,
    rgba(0, 0, 0, 0.18) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: multiply;
  opacity: 0.55;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 199;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, 0.55) 130%);
}

a { color: var(--cyan); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter); }

.prompt-label { color: var(--amber-dim); }
.prompt-cmd { color: var(--amber-bright); }

#skipnav a {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--amber);
  color: #0a0904;
  padding: 0.6em 1em;
  z-index: 999;
}
#skipnav a:focus { left: var(--gutter); top: var(--gutter); }

/* ---------- Nav ---------- */
.mainnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 9, 4, 0.88);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
.mainnav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  font-size: 0.88rem;
}
.brand { color: var(--amber-dim); }
.brand strong { color: var(--amber-bright); }
.navlinks {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.navlinks a { color: var(--amber-dim); }
.navlinks a::before { content: "$ "; color: var(--amber-faint); }
.navlinks a:hover, .navlinks a:focus-visible { color: var(--amber-bright); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-strong);
  color: var(--amber);
  padding: 0.4em 0.6em;
  font-family: var(--font-mono);
}
@media (max-width: 720px) {
  .navlinks {
    position: absolute;
    top: 52px; left: 0; right: 0;
    background: var(--panel);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .navlinks.open { max-height: 260px; }
  .navlinks li { border-top: 1px solid var(--border); }
  .navlinks a { display: block; padding: 0.9rem var(--gutter); }
  .nav-toggle { display: inline-flex; }
}

/* ---------- Hero: boot sequence ---------- */
.hero { padding: 110px 0 4rem; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}
.hero-grid > div:first-child { min-width: 0; }
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .cam-panel { max-width: 320px; margin: 0 auto; }
}

/* Camera feed panel */
.cam-panel {
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  overflow: hidden;
  background: var(--panel);
  box-shadow: 0 0 26px rgba(255, 176, 0, 0.10);
  width: 100%;
  max-width: 300px;
  justify-self: end;
  min-width: 0;
}
@media (max-width: 860px) { .cam-panel { justify-self: center; } }
.termwin-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.cam-frame {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
}
.cam-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(1) sepia(0.65) hue-rotate(-8deg) saturate(2.6) brightness(0.82) contrast(1.15);
  -webkit-user-drag: none;
  user-drag: none;
  -webkit-touch-callout: none;
  pointer-events: none;
}
.cam-shield {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: transparent;
}
.cam-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0,0,0,0.35) 0px,
    rgba(0,0,0,0.35) 1px,
    transparent 1px,
    transparent 3px
  );
  pointer-events: none;
}
.cam-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,0.6) 130%);
  pointer-events: none;
}
.cam-tag {
  position: absolute;
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--amber-bright);
  text-shadow: 0 0 6px rgba(0,0,0,0.8);
  display: flex;
  align-items: center;
  gap: 0.3em;
  z-index: 2;
}
.cam-tag-tl { top: 0.6rem; left: 0.6rem; color: var(--red); }
.cam-tag-tr { top: 0.6rem; right: 0.6rem; }
.cam-tag-bl { bottom: 0.6rem; left: 0.6rem; }
.cam-tag-br { bottom: 0.6rem; right: 0.6rem; color: var(--green); }
.cam-rec-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 6px var(--red);
  animation: rec-blink 1.4s ease-in-out infinite;
}
@keyframes rec-blink { 50% { opacity: 0.15; } }

.boot-log {
  margin: 0 0 1.6rem;
  font-size: 0.82rem;
  color: var(--amber-faint);
  white-space: pre-wrap;
}
.boot-log .ok { color: var(--green); }

.hero-prompt-line { color: var(--amber-dim); font-size: 0.95rem; }

.hero-name {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.4vw, 3.6rem);
  line-height: 1.05;
  color: var(--amber-bright);
  text-shadow: 0 0 14px rgba(255, 197, 98, 0.35);
}
.hero-name .typed-text::after {
  content: "▌";
  display: inline-block;
  margin-left: 0.12em;
  color: var(--amber);
  animation: blink-caret 0.8s step-end infinite;
}
@keyframes blink-caret { 50% { opacity: 0; } }
@media (max-width: 900px) {
  .hero-name { font-size: clamp(2rem, 9vw, 3rem); }
}

.hero-role {
  margin-top: 1.1rem;
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--amber);
}
.hero-role strong { color: var(--cyan); }
.hero-desc {
  margin-top: 0.9rem;
  max-width: 62ch;
  color: var(--amber-dim);
}

.hero-cta {
  margin-top: 1.8rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.75em 1.2em;
  border: 1px solid var(--border-strong);
  color: var(--amber);
  transition: background 0.2s ease, color 0.2s ease;
}
.btn::before { content: "$ "; color: var(--amber-faint); }
.btn-primary { background: var(--amber); color: #0a0904; border-color: var(--amber); font-weight: 600; }
.btn-primary::before { color: rgba(10,9,4,0.5); }
.btn-primary:hover { background: var(--amber-bright); }
.btn-ghost:hover, .btn-ghost:focus-visible { color: var(--amber-bright); border-color: var(--amber); }

/* ---------- Terminal window panels ---------- */
section { padding: 3.2rem 0; }

.termwin {
  border: 1px solid var(--border-strong);
  background: var(--panel);
  border-radius: 6px;
  overflow: hidden;
}
.termwin-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.9rem;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-red { background: var(--red); }
.dot-yellow { background: var(--yellow); }
.dot-green { background: var(--green); }
.termwin-title {
  margin-left: 0.6rem;
  font-size: 0.78rem;
  color: var(--amber-dim);
}
.termwin-body { padding: clamp(1.2rem, 3vw, 2rem); }

.section-head { margin-bottom: 1.6rem; }
.section-head h2 {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--amber-bright);
  margin: 0;
}
.section-head h2::before { content: "# "; color: var(--amber-faint); }

/* ---------- About: cat about.md ---------- */
.about-out p { color: var(--amber); margin: 0 0 0.9rem; }
.about-out .comment { color: var(--amber-faint); }

.stat-strip {
  display: flex;
  gap: 2.2rem;
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
  font-size: 0.85rem;
}
.stat-num { color: var(--green); font-weight: 700; }

/* systemctl-style skills table */
.svc-table { width: 100%; border-collapse: collapse; font-size: 0.84rem; margin-top: 1.4rem; }
.svc-table th {
  text-align: left;
  color: var(--amber-faint);
  font-weight: 500;
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--border-strong);
}
.svc-table td { padding: 0.42rem 0.6rem; border-bottom: 1px solid var(--border); color: var(--amber); }
.svc-status { color: var(--green); }
.svc-status::before { content: "● "; }
.svc-cat { color: var(--amber-dim); }

/* ---------- Career: tail -f career.log ---------- */
.log-line { display: flex; gap: 0.7rem; padding: 0.5rem 0; border-bottom: 1px dashed var(--border); font-size: 0.86rem; flex-wrap: wrap; }
.log-line:last-child { border-bottom: none; }
.log-ts { color: var(--amber-faint); white-space: nowrap; }
.log-level { font-weight: 700; white-space: nowrap; }
.log-level.info { color: var(--cyan); }
.log-level.live { color: var(--green); }
.log-msg { color: var(--amber); }
.log-msg strong { color: var(--amber-bright); }
.log-note { color: var(--amber-faint); font-style: italic; display: block; margin-top: 0.15rem; }
.log-tail-cursor { color: var(--green); }

/* ---------- Projects: ls -la ---------- */
.ls-header { color: var(--amber-faint); font-size: 0.82rem; margin-bottom: 0.6rem; }
.ls-list { list-style: none; margin: 0 0 1.6rem; padding: 0; font-size: 0.86rem; }
.ls-list li { display: flex; gap: 0.8rem; padding: 0.3rem 0; color: var(--amber-dim); flex-wrap: wrap; }
.ls-perm { color: var(--amber-faint); }
.ls-name { color: var(--cyan); }

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.2rem;
}
.detail-card {
  border: 1px solid var(--border);
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: border-color 0.2s ease;
}
.detail-card:hover { border-color: var(--border-strong); }
.detail-card .file-tag { color: var(--amber-faint); font-size: 0.72rem; }
.detail-card h3 { font-size: 0.98rem; color: var(--amber-bright); margin: 0; font-weight: 600; }
.detail-card p { color: var(--amber-dim); font-size: 0.85rem; margin: 0; flex-grow: 1; }
.detail-placeholder-flag {
  align-self: flex-start;
  font-size: 0.65rem;
  color: var(--yellow);
  border: 1px dashed var(--yellow);
  padding: 0.1em 0.5em;
}
.detail-link { color: var(--cyan); font-size: 0.82rem; }

/* ---------- Contact: curl output ---------- */
.curl-cmd { color: var(--amber-dim); font-size: 0.86rem; margin-bottom: 1rem; }
.json-out { font-size: 0.88rem; }
.json-key { color: var(--cyan); }
.json-str { color: var(--amber); }
.json-punct { color: var(--amber-faint); }
.contact-links { margin-top: 1.2rem; display: flex; flex-wrap: wrap; gap: 1.5rem; }
.contact-link { display: flex; align-items: center; gap: 0.5rem; color: var(--amber); }
.contact-link:hover { color: var(--amber-bright); }
.contact-link svg { width: 17px; height: 17px; }

.footer-note { text-align: center; margin-top: 2.4rem; font-size: 0.76rem; color: var(--amber-faint); }

.scroll-top {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 90;
}
.scroll-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }