/* =========================================================
   Ravi Potineni — dark / intense / red & black
   Palette: near-black, bone white, deep red with a hot accent
   ========================================================= */

:root {
  --black:       #0a0a0a;
  --black-soft:  #141414;
  --surface:     #181818;
  --surface-hi:  #1f1f1f;
  --line:        #2a2a2a;
  --line-hi:     #3a3a3a;

  --bone:        #ededed;
  --bone-dim:    #b8b3aa;
  --bone-faded:  #7a766e;

  --red:         #e21d2c;   /* primary accent */
  --red-hot:     #ff2436;   /* hover/glow */
  --red-deep:    #8a0f17;   /* shadow tint */
  --red-blood:   #4a0810;   /* deepest tint */

  --serif: "Times New Roman", Georgia, "Iowan Old Style", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono:  ui-monospace, SFMono-Regular, "SF Mono", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  background: var(--black);
}

body {
  font-family: var(--sans);
  color: var(--bone);
  line-height: 1.65;
  background:
    radial-gradient(circle at 12% 8%,  rgba(226, 29, 44, 0.18), transparent 45%),
    radial-gradient(circle at 88% 92%, rgba(226, 29, 44, 0.12), transparent 50%),
    var(--black);
  min-height: 100vh;
}

/* film grain over everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.55'/></svg>");
  opacity: 0.09;
  z-index: 1;
  mix-blend-mode: overlay;
}

/* vignette */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,0.65) 100%);
  z-index: 1;
}

main, .nav, .footer { position: relative; z-index: 2; }

::selection { background: var(--red); color: var(--bone); }

/* ========== Nav ========== */

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.75rem 2rem;
  max-width: 980px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}

.nav-brand {
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--bone);
  text-decoration: none;
  letter-spacing: -0.02em;
  border: 2px solid var(--red);
  padding: 0.1rem 0.55rem 0.2rem;
  border-radius: 50%;
  transform: rotate(-4deg);
  transition: all 0.25s ease;
  box-shadow: 0 0 0 0 var(--red);
}
.nav-brand:hover {
  transform: rotate(4deg);
  color: var(--red);
  box-shadow: 0 0 18px 0 rgba(226, 29, 44, 0.6);
}

.nav-links { display: flex; gap: 1.75rem; }
.nav-links a {
  color: var(--bone-dim);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--red); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%; height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav-links a:hover::after { transform: scaleX(1); }

/* ========== Layout ========== */

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

/* ========== Hero ========== */

.hero {
  padding: 4rem 0 5rem;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  top: 1rem;
  left: -1rem;
  width: 4px;
  height: 60%;
  background: var(--red);
  box-shadow: 0 0 24px var(--red-hot);
}

.kicker {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 1.75rem;
  color: var(--bone);
  text-shadow: 0 0 40px rgba(0,0,0,0.5);
}

.hl {
  display: inline-block;
  padding: 0 0.3rem;
  position: relative;
}
.hl-red {
  color: var(--red-hot);
  text-shadow: 0 0 18px rgba(255, 36, 54, 0.55);
}
.hl-yellow {
  color: var(--bone);
  border-bottom: 3px solid var(--red);
  padding-bottom: 0;
}

.lede {
  font-size: 1.15rem;
  color: var(--bone-dim);
  max-width: 580px;
}

/* ========== Sections ========== */

.section {
  margin-top: 4.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--mono);
  font-size: 0.9rem;
  margin-bottom: 2rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--bone);
}

.dot {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  box-shadow: 0 0 12px currentColor;
}
.dot-red    { background: var(--red); color: var(--red); }
.dot-yellow { background: var(--bone); color: var(--bone); }
.dot-teal   { background: var(--red-hot); color: var(--red-hot); }

.section-link {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 400;
  color: var(--bone-faded);
  text-decoration: none;
  transition: color 0.2s;
}
.section-link:hover { color: var(--red); }

/* ========== Card grid ========== */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--bone);
  position: relative;
  transition: all 0.25s ease;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(226, 29, 44, 0.08));
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--red);
  background: var(--surface-hi);
  box-shadow:
    0 0 0 1px var(--red),
    0 12px 30px -10px rgba(226, 29, 44, 0.45),
    0 0 60px -20px rgba(255, 36, 54, 0.35);
}
.card:hover::before { opacity: 1; }

/* keep tilt classes as no-op so HTML doesn't break, but no rotation */
.tilt-left, .tilt-right { transform: none; }

.card-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  border-radius: 2px;
  margin-bottom: 1rem;
  background: var(--black-soft);
  border: 1px solid var(--line-hi);
  color: var(--bone-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card-software { border-left: 3px solid var(--red); }
.card-art      { border-left: 3px solid var(--bone); }

.card h3 {
  font-family: var(--serif);
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.card p {
  font-size: 0.92rem;
  color: var(--bone-dim);
  line-height: 1.55;
}

.card:hover h3 { color: var(--red); }

/* ========== About ========== */

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
}

.about-grid p { margin-bottom: 1rem; color: var(--bone-dim); }
.about-grid a {
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px solid var(--red-deep);
  transition: all 0.2s;
}
.about-grid a:hover {
  color: var(--red-hot);
  border-bottom-color: var(--red-hot);
  text-shadow: 0 0 12px rgba(255, 36, 54, 0.55);
}

.fact-list {
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  border-radius: 2px;
  padding: 1.25rem 1.5rem;
  transform: none;
}

.fact-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
  color: var(--bone);
}
.fact-list li:last-child { border-bottom: none; }
.fact-list li span {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--red);
  margin-bottom: 0.15rem;
}

/* ========== Contact ========== */

.contact-lede {
  color: var(--bone-dim);
  margin-bottom: 1.5rem;
  max-width: 540px;
}

.contact-btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.95rem;
  background: var(--red);
  color: var(--black);
  padding: 0.95rem 1.6rem;
  border-radius: 2px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: all 0.25s;
  box-shadow: 0 0 0 0 var(--red-hot);
}
.contact-btn:hover {
  background: var(--red-hot);
  transform: translateY(-2px);
  box-shadow: 0 0 30px 2px rgba(255, 36, 54, 0.6);
}

/* ========== Footer ========== */

.footer {
  max-width: 980px;
  margin: 0 auto;
  padding: 3rem 2rem 2rem;
  text-align: center;
  color: var(--bone-faded);
  font-size: 0.8rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-top: 1px solid var(--line);
}

.wave {
  display: inline-block;
  animation: wave 2.5s ease-in-out infinite;
  transform-origin: 70% 70%;
  filter: drop-shadow(0 0 8px var(--red));
}
@keyframes wave {
  0%, 60%, 100% { transform: rotate(0); }
  10% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  30% { transform: rotate(14deg); }
  40% { transform: rotate(-4deg); }
  50% { transform: rotate(10deg); }
}

/* ========== Project detail pages ========== */

.detail {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem;
  position: relative;
  z-index: 2;
}

.detail .back {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--bone-faded);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  transition: color 0.2s;
}
.detail .back:hover { color: var(--red); }

.detail h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
  color: var(--bone);
}

.detail .meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--red);
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.detail h2 {
  font-family: var(--serif);
  font-size: 1.6rem;
  margin: 2.5rem 0 0.75rem;
  color: var(--bone);
  padding-left: 1rem;
  border-left: 3px solid var(--red);
}

.detail p { margin-bottom: 1rem; color: var(--bone-dim); }

.detail .image-placeholder {
  background: var(--surface);
  border: 1px dashed var(--line-hi);
  border-radius: 2px;
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bone-faded);
  font-family: var(--mono);
  font-size: 0.8rem;
  margin: 1.5rem 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.detail ul, .detail ol { margin: 1rem 0 1rem 1.5rem; color: var(--bone-dim); }
.detail li { margin-bottom: 0.5rem; }

.detail a:not(.back) {
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px solid var(--red-deep);
  transition: all 0.2s;
}
.detail a:not(.back):hover {
  color: var(--red-hot);
  border-bottom-color: var(--red-hot);
  text-shadow: 0 0 12px rgba(255, 36, 54, 0.5);
}

.detail code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--black-soft);
  border: 1px solid var(--line);
  padding: 0.1rem 0.35rem;
  border-radius: 2px;
  color: var(--red-hot);
}

.download-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  border-radius: 2px;
  padding: 1.5rem;
  margin: 2rem 0;
}
.download-box h3 {
  font-family: var(--mono);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--red);
  margin-bottom: 0.75rem;
}

/* ========== Responsive ========== */

@media (max-width: 700px) {
  .nav { padding: 1rem 1.25rem; }
  .nav-links { gap: 1rem; font-size: 0.75rem; }
  main { padding: 0 1.25rem 3rem; }
  .hero { padding: 2rem 0 3rem; }
  .hero::before { left: -0.5rem; }
  .about-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 0.8rem; }
  .section-link { font-size: 0.7rem; }
}