/* ══════════════════════════════════════════════════════
   Sohrab Ahmadpur — "Complexity → Clarity"
   Dark cinematic design system over the 3D data universe
   ══════════════════════════════════════════════════════ */

:root {
  --bg:        #04050a;
  --ink:       #eef0f6;
  --dim:       #9aa1b5;
  --faint:     #5a6076;
  --blue:      #5b8cff;
  --violet:    #a06bff;
  --amber:     #ffb35c;
  --glass:     rgba(13, 16, 28, 0.55);
  --glass-brd: rgba(140, 160, 255, 0.13);
  --grad:      linear-gradient(120deg, var(--blue), var(--violet));

  --font-display: "Oswald", sans-serif;
  --font-body:    "Instrument Sans", sans-serif;
  --font-mono:    "JetBrains Mono", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(91, 140, 255, 0.35); color: var(--ink); }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── 3D canvas & fallback ─────────────────────────── */

#scene {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  display: block;
}

html.no-webgl #scene { display: none; }

html.no-webgl body {
  background:
    radial-gradient(ellipse 80% 60% at 70% 10%, rgba(91, 140, 255, 0.14), transparent 60%),
    radial-gradient(ellipse 70% 50% at 20% 80%, rgba(160, 107, 255, 0.12), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(ellipse 120% 100% at 50% 50%, transparent 55%, rgba(2, 3, 6, 0.55) 100%);
}

/* ── Content layer ────────────────────────────────── */

.page {
  position: relative;
  z-index: 2;
}

/* ── Left progress rail ───────────────────────────── */

.rail {
  position: fixed;
  z-index: 10;
  left: 28px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 18px;
  align-items: stretch;
}

.rail__track {
  width: 1px;
  background: rgba(140, 160, 255, 0.15);
  position: relative;
  overflow: hidden;
}

.rail__fill {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 0%;
  background: var(--grad);
}

.rail__list {
  display: flex;
  flex-direction: column;
  gap: 26px;
  padding: 6px 0;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-link__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--faint);
  transition: background 0.3s, box-shadow 0.3s, transform 0.3s;
  flex-shrink: 0;
}

.nav-link__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.3s, transform 0.3s, color 0.3s;
  white-space: nowrap;
}

.nav-link:hover .nav-link__label,
.nav-link.active .nav-link__label {
  opacity: 1;
  transform: translateX(0);
}

.nav-link.active .nav-link__dot {
  background: var(--amber);
  box-shadow: 0 0 12px rgba(255, 179, 92, 0.8);
  transform: scale(1.35);
}

.nav-link.active .nav-link__label { color: var(--ink); }

/* ── Typography ───────────────────────────────────── */

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 22px;
}

.eyebrow--hero { color: var(--dim); }

.sec__heading {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4.2vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: 0.01em;
  margin-bottom: 28px;
}

.sec__heading em,
.hero__headline em {
  font-style: normal;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.sec__heading--xl { font-size: clamp(2.2rem, 3.8vw, 3.4rem); }

.lead {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--ink);
  margin-bottom: 20px;
}

.body {
  color: var(--dim);
  margin-bottom: 18px;
}

/* ── Panels (glass) ───────────────────────────────── */

.panel {
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(1.25);
  backdrop-filter: blur(16px) saturate(1.25);
  border: 1px solid var(--glass-brd);
  border-radius: 22px;
  padding: 44px;
}

/* ── Sections ─────────────────────────────────────── */

.sec {
  max-width: 1150px;
  margin: 0 auto;
  padding: 22vh 40px 22vh 110px;
}

.sec__head { margin-bottom: 48px; max-width: 640px; }

.panel--left { max-width: 640px; }

/* ── Reveal animation ─────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.9s cubic-bezier(0.2, 0.6, 0.2, 1), transform 0.9s cubic-bezier(0.2, 0.6, 0.2, 1);
  transition-delay: var(--delay, 0ms);
}

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

/* ── Hero ─────────────────────────────────────────── */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  max-width: 1250px;
  margin: 0 auto;
  padding: 120px 40px 80px 110px;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: center;
}

.hero__headline {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.4rem, 5vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin-bottom: 30px;
}

.hero__line {
  display: block;
  opacity: 0;
  transform: translateY(40px);
  animation: heroLine 1.1s cubic-bezier(0.2, 0.65, 0.2, 1) forwards;
}

.hero__line:nth-child(1) { animation-delay: 0.15s; }
.hero__line:nth-child(2) { animation-delay: 0.3s; }
.hero__line:nth-child(3) { animation-delay: 0.45s; }

@keyframes heroLine {
  to { opacity: 1; transform: none; }
}

.hero__sub {
  font-size: 1.15rem;
  color: var(--dim);
  max-width: 480px;
  margin-bottom: 36px;
  opacity: 0;
  animation: heroLine 1.1s cubic-bezier(0.2, 0.65, 0.2, 1) 0.65s forwards;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0;
  animation: heroLine 1.1s cubic-bezier(0.2, 0.65, 0.2, 1) 0.8s forwards;
}

.hero__photo-wrap {
  position: relative;
  opacity: 0;
  animation: heroLine 1.4s cubic-bezier(0.2, 0.65, 0.2, 1) 0.5s forwards;
}

.hero__photo {
  border-radius: 50%;
  aspect-ratio: 1;
  object-fit: cover;
  width: min(340px, 100%);
  margin-left: auto;
  filter: grayscale(0.15) contrast(1.06) brightness(0.96);
  box-shadow:
    0 0 0 1px rgba(140, 160, 255, 0.2),
    0 0 60px rgba(91, 140, 255, 0.22),
    0 0 140px rgba(160, 107, 255, 0.16);
}

.hero__hint {
  position: absolute;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  opacity: 0;
  animation: heroLine 1.2s ease 1.4s forwards;
}

.hero__hint-text {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.hero__hint-line {
  width: 1px;
  height: 44px;
  background: linear-gradient(to bottom, var(--faint), transparent);
  animation: hintPulse 2.2s ease-in-out infinite;
}

@keyframes hintPulse {
  0%, 100% { transform: scaleY(0.4); transform-origin: top; opacity: 0.4; }
  50%      { transform: scaleY(1);   transform-origin: top; opacity: 1; }
}

/* ── Buttons ──────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 15px 28px;
  border-radius: 999px;
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s, border-color 0.3s;
}

.btn--primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 0 28px rgba(91, 140, 255, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 44px rgba(120, 120, 255, 0.55);
}

.btn--ghost {
  border: 1px solid rgba(140, 160, 255, 0.3);
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: rgba(140, 160, 255, 0.7);
  transform: translateY(-2px);
}

/* ── About ────────────────────────────────────────── */

.avail {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--dim);
  border: 1px solid var(--glass-brd);
  border-radius: 999px;
  padding: 10px 18px;
}

.avail-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 10px rgba(74, 222, 128, 0.8);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.45; }
}

/* ── Services ─────────────────────────────────────── */

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.service-card {
  padding: 36px 30px;
  position: relative;
  transition: transform 0.4s cubic-bezier(0.2, 0.6, 0.2, 1), border-color 0.4s, opacity 0.9s cubic-bezier(0.2, 0.6, 0.2, 1);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(140, 160, 255, 0.35);
}

.service-card__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--faint);
  display: block;
  margin-bottom: 18px;
}

.service-card__idx::before { content: "// "; color: var(--amber); }

.service-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.25;
  margin-bottom: 14px;
}

.service-card__body {
  font-size: 0.95rem;
  color: var(--dim);
  margin-bottom: 22px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tags li,
.tags span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--dim);
  border: 1px solid var(--glass-brd);
  border-radius: 999px;
  padding: 5px 12px;
}

/* ── Story ────────────────────────────────────────── */

.story-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: start;
}

.story-meta { padding: 28px; margin-top: 34px; }

.story-meta__item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(140, 160, 255, 0.08);
}

.story-meta__item:last-child { border-bottom: none; }

.story-meta__item strong {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.story-meta__item span {
  font-size: 0.95rem;
  color: var(--ink);
}

.story-right p {
  color: var(--dim);
  margin-bottom: 18px;
}

.story-right p em { color: var(--ink); }

.story-certs { margin-top: 34px; }

.story-certs__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--amber);
  margin-bottom: 16px;
}

.story-certs__extra {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--faint);
}

/* ── Impact ───────────────────────────────────────── */

.impact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 22px;
}

.impact-card { padding: 30px 26px; }

.impact-card__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.6rem;
  line-height: 1;
  display: block;
  margin-bottom: 12px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.impact-card__title {
  font-weight: 600;
  font-size: 1rem;
  display: block;
  margin-bottom: 10px;
}

.impact-card__desc {
  font-size: 0.87rem;
  color: var(--dim);
}

/* ── Timeline ─────────────────────────────────────── */

.timeline { padding: 40px 44px; }

.timeline__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: 30px;
}

.timeline__items {
  position: relative;
  padding-left: 26px;
}

.timeline__items::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--blue), var(--violet), transparent);
  opacity: 0.5;
}

.timeline__item {
  position: relative;
  padding-bottom: 26px;
}

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

.timeline__dot {
  position: absolute;
  left: -26px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--blue);
  box-shadow: 0 0 10px rgba(91, 140, 255, 0.6);
}

.timeline__period {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--amber);
  display: block;
  margin-bottom: 3px;
}

.timeline__org {
  display: block;
  font-weight: 600;
  font-size: 1.02rem;
}

.timeline__role {
  display: block;
  font-size: 0.9rem;
  color: var(--dim);
}

/* ── Contact ──────────────────────────────────────── */

.sec--contact {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.contact-sub {
  color: var(--dim);
  max-width: 440px;
}

.contact-card {
  padding: 34px 36px;
}

.contact-card__avail {
  margin: 0 0 26px;
}

.contact-rows {
  display: flex;
  flex-direction: column;
}

.contact-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid rgba(140, 160, 255, 0.1);
  transition: padding-left 0.3s cubic-bezier(0.2, 0.6, 0.2, 1);
}

.contact-row:hover {
  padding-left: 8px;
}

.contact-row__label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--amber);
  white-space: nowrap;
}

.contact-row__val {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  font-size: 1rem;
  text-align: right;
  overflow-wrap: anywhere;
}

.contact-row__val svg {
  flex-shrink: 0;
  color: var(--faint);
  transition: color 0.3s, transform 0.3s;
}

.contact-row:hover .contact-row__val svg {
  color: var(--blue);
  transform: translate(2px, -2px);
}

.contact-card__meta {
  display: flex;
  gap: 40px;
  padding-top: 22px;
  border-top: 1px solid rgba(140, 160, 255, 0.1);
}

.contact-card__meta-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.contact-card__meta-item strong {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--faint);
}

.contact-card__meta-item span {
  font-size: 0.92rem;
  color: var(--dim);
}

/* ── Footer ───────────────────────────────────────── */

.footer {
  margin-top: 14vh;
  padding-top: 30px;
  border-top: 1px solid rgba(140, 160, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--faint);
}

/* ── Mobile header / nav ──────────────────────────── */

.mob-header {
  display: none;
  position: fixed;
  z-index: 20;
  top: 0; left: 0; right: 0;
  padding: 16px 22px;
  align-items: center;
  justify-content: space-between;
  background: rgba(4, 5, 10, 0.7);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(140, 160, 255, 0.08);
}

.mob-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
}

.burger {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
}

.burger span {
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s, opacity 0.3s;
}

.mob-nav {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: rgba(4, 5, 10, 0.92);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}

.mob-nav.open {
  opacity: 1;
  pointer-events: auto;
}

.mob-nav__close {
  position: absolute;
  top: 20px;
  right: 22px;
  background: none;
  border: none;
  color: var(--ink);
  cursor: pointer;
  padding: 10px;
}

.mob-nav__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mob-nav__link {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.6;
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s, transform 0.5s;
  transition-delay: calc(var(--i) * 70ms + 100ms);
}

.mob-nav.open .mob-nav__link {
  opacity: 1;
  transform: none;
}

.mob-nav__foot {
  margin-top: 48px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--dim);
}

/* ── Responsive ───────────────────────────────────── */

@media (max-width: 1100px) {
  .services-grid { grid-template-columns: 1fr; max-width: 560px; }
  .impact-grid { grid-template-columns: repeat(2, 1fr); }
  .story-layout, .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .rail { display: none; }
  .mob-header { display: flex; }

  .sec { padding: 16vh 24px; }
  .hero { padding: 120px 24px 80px; }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero__photo-wrap { order: -1; }
  .hero__photo { width: min(220px, 60vw); margin: 0 auto; }
  .hero__hint { display: none; }

  .panel { padding: 30px 24px; }
  .timeline { padding: 30px 24px; }

  .impact-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .impact-card { padding: 24px 18px; }
}

@media (max-width: 520px) {
  .impact-grid { grid-template-columns: 1fr; }
}

/* ── Reduced motion ───────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .hero__line, .hero__sub, .hero__actions, .hero__photo-wrap, .hero__hint {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .hero__hint-line { animation: none; }
  .avail-dot { animation: none; }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}