/* ══════════════════════════════════════════════════
   Hasin Israque Chowdhury Taha — Portfolio CSS
   Dark futuristic theme · Orange / Cyan / Navy
   ══════════════════════════════════════════════════ */

/* ── Reset & Base ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --orange:      #ff7438;
  --orange-dim:  #cc5a28;
  --cyan:        #00d4ff;
  --navy:        #0a0f1e;
  --black:       #050508;
  --card-bg:     rgba(255,255,255,0.028);
  --card-border: rgba(255,116,56,0.16);
  --grey:        #8b8fa8;
  --light:       #eef0f8;
  --white:       #ffffff;

  --radius-sm:   16px;
  --radius-md:   22px;
  --radius-lg:   30px;
  --radius-xl:   40px;

  --transition:  0.28s cubic-bezier(0.4,0,0.2,1);
  --font-main:   'Space Grotesk', 'Inter', Arial, sans-serif;
  --font-body:   'Inter', Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  min-height: 100vh;
  background: var(--black);
  color: var(--light);
  font-family: var(--font-body);
  overflow-x: hidden;
  line-height: 1.6;
}

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── Background elements ── */
.bg-grid {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(255,116,56,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,116,56,0.03) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  z-index: 0;
  pointer-events: none;
}

#particles-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* ── Gears decoration ── */
.gears {
  position: fixed;
  right: -60px;
  bottom: -50px;
  width: 340px;
  height: 340px;
  opacity: 0.1;
  z-index: 1;
  pointer-events: none;
}

.gear {
  position: absolute;
  border: 10px solid var(--orange);
  border-radius: 50%;
  animation: spin 12s linear infinite;
}

.gear::before {
  content: "";
  position: absolute;
  inset: 30%;
  border: 8px solid var(--orange);
  border-radius: 50%;
}

.gear::after {
  content: "";
  position: absolute;
  inset: -24px;
  background:
    linear-gradient(0deg,   transparent 42%, var(--orange) 42%, var(--orange) 58%, transparent 58%),
    linear-gradient(45deg,  transparent 43%, var(--orange) 43%, var(--orange) 57%, transparent 57%),
    linear-gradient(90deg,  transparent 42%, var(--orange) 42%, var(--orange) 58%, transparent 58%),
    linear-gradient(135deg, transparent 43%, var(--orange) 43%, var(--orange) 57%, transparent 57%);
  border-radius: 50%;
  z-index: -1;
}

.gear--large { width: 180px; height: 180px; right: 40px; bottom: 60px; }
.gear--small {
  width: 115px; height: 115px; right: 195px; bottom: 10px;
  animation-direction: reverse;
  animation-duration: 8s;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Layout ── */
.site {
  position: relative;
  z-index: 2;
  width: min(1140px, calc(100% - 48px));
  margin: 0 auto;
}

/* ── Navigation ── */
nav {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1140px, calc(100% - 36px));
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  border: 1px solid rgba(255,116,56,0.18);
  border-radius: 999px;
  background: rgba(5,5,8,0.8);
  backdrop-filter: blur(16px);
  transition: var(--transition);
}

nav.scrolled {
  top: 10px;
  background: rgba(5,5,8,0.95);
  border-color: rgba(255,116,56,0.28);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 15px;
  color: var(--light);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  color: var(--grey);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: 999px;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--light);
  background: rgba(255,116,56,0.1);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  border-radius: 8px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--light);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(5,5,8,0.97);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-link {
  color: var(--grey);
  font-family: var(--font-main);
  font-size: clamp(1.4rem, 6vw, 2rem);
  font-weight: 600;
  padding: 8px 24px;
  border-radius: 12px;
  transition: var(--transition);
}

.mobile-link:hover {
  color: var(--orange);
  background: rgba(255,116,56,0.06);
}

/* ── Section base ── */
section {
  padding: 100px 0;
  border-top: 1px solid rgba(255,255,255,0.045);
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: flex-end;
  margin-bottom: 48px;
}

.section-desc {
  max-width: 420px;
  color: var(--grey);
  font-size: 15px;
  line-height: 1.75;
}

h2 {
  font-family: var(--font-main);
  font-size: clamp(2.4rem, 6vw, 5rem);
  letter-spacing: -2px;
  line-height: 0.95;
  font-weight: 800;
}

.tag {
  color: var(--orange);
  font-size: 11.5px;
  letter-spacing: 3.5px;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 14px;
}

.accent { color: var(--orange); }
.sep { color: rgba(255,116,56,0.4); margin: 0 6px; }

/* ── Glass card ── */
.glass-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,116,56,0.38);
  background: rgba(255,116,56,0.04);
}

.card-label {
  color: var(--orange);
  font-size: 11px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 14px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-main);
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background: var(--orange);
  color: var(--black);
  border: 1px solid var(--orange);
}

.btn--primary:hover {
  background: #ff8f5a;
  border-color: #ff8f5a;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255,116,56,0.35);
}

.btn--outline {
  color: var(--light);
  border: 1px solid rgba(255,116,56,0.35);
  background: rgba(255,116,56,0.04);
}

.btn--outline:hover {
  border-color: var(--orange);
  background: rgba(255,116,56,0.1);
  transform: translateY(-2px);
}

.btn--ghost {
  color: var(--grey);
  border: 1px solid rgba(255,255,255,0.1);
  background: transparent;
}

.btn--ghost:hover {
  color: var(--light);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

.btn--full { width: 100%; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ── Social icons ── */
.socials,
.hero-socials {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.socials a,
.hero-socials a {
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,116,56,0.22);
  border-radius: 50%;
  background: rgba(255,116,56,0.03);
  transition: var(--transition);
}

.socials a svg,
.hero-socials a svg {
  width: 20px;
  height: 20px;
  fill: var(--grey);
  transition: var(--transition);
}

.socials a:hover,
.hero-socials a:hover {
  background: var(--orange);
  border-color: var(--orange);
  transform: translateY(-2px);
}

.socials a:hover svg,
.hero-socials a:hover svg {
  fill: var(--black);
}

/* ══════════════════════
   HERO
   ══════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 140px 0 80px;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: center;
}

.hero-content { }

h1 {
  font-family: var(--font-main);
  font-size: clamp(3.4rem, 10vw, 9rem);
  line-height: 0.9;
  letter-spacing: clamp(-5px, -0.5vw, -2px);
  margin: 20px 0 22px;
  font-weight: 900;
}

.hero-sub {
  font-size: clamp(13px, 1.8vw, 16px);
  color: var(--grey);
  margin-bottom: 20px;
  font-weight: 500;
}

.hero-text {
  max-width: 600px;
  color: var(--grey);
  font-size: clamp(15px, 1.8vw, 17.5px);
  line-height: 1.8;
  margin-bottom: 34px;
}

/* Profile photo */
.hero-photo {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 16px;
}

.photo-frame {
  position: relative;
  width: min(380px, 100%);
  aspect-ratio: 1 / 1.18;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(255,116,56,0.28);
  background: rgba(255,255,255,0.02);
}

.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(8%) brightness(0.96);
  transition: filter 0.5s ease;
}

.photo-frame:hover img {
  filter: grayscale(0%) brightness(1);
}

.photo-glow {
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: conic-gradient(
    from 0deg,
    transparent 0%,
    var(--orange) 15%,
    transparent 30%,
    transparent 70%,
    var(--cyan) 85%,
    transparent 100%
  );
  opacity: 0.5;
  animation: spin 6s linear infinite;
  z-index: -1;
}

.photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5,5,8,0.4), transparent 55%);
  pointer-events: none;
}

.photo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid rgba(255,116,56,0.2);
  border-radius: 999px;
  background: rgba(5,5,8,0.8);
  backdrop-filter: blur(12px);
  font-size: 12.5px;
  color: var(--grey);
  font-weight: 500;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px #22c55e; }
  50%       { opacity: 0.5; box-shadow: 0 0 16px #22c55e; }
}

/* Hero stats strip */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 60px;
  padding: 28px 36px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  flex-wrap: wrap;
}

.hstat {
  flex: 1;
  min-width: 120px;
  text-align: center;
}

.hstat strong {
  display: inline;
  font-family: var(--font-main);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--orange);
  line-height: 1;
}

.hstat span {
  font-family: var(--font-main);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 900;
  color: var(--orange);
}

.hstat p {
  color: var(--grey);
  font-size: 12px;
  margin-top: 6px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hstat-div {
  width: 1px;
  height: 40px;
  background: rgba(255,116,56,0.18);
  flex-shrink: 0;
  margin: 0 12px;
}

/* ══════════════════════
   ABOUT
   ══════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.about-story h3 {
  font-family: var(--font-main);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  margin-bottom: 14px;
  line-height: 1.3;
}

.about-story p { color: var(--grey); font-size: 14.5px; line-height: 1.8; }

.glass-card h3 {
  font-family: var(--font-main);
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.3;
}

.glass-card p { color: var(--grey); font-size: 14px; line-height: 1.75; }

.about-list { margin-top: 10px; }
.about-list li {
  color: var(--grey);
  font-size: 13.5px;
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.about-list li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
  flex-shrink: 0;
}

/* Impact stats */
.impact-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 8px;
}

.istat {
  border: 1px solid var(--card-border);
  background: rgba(255,116,56,0.025);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

.istat:hover {
  border-color: rgba(255,116,56,0.38);
  transform: translateY(-3px);
}

.istat strong {
  display: inline;
  font-family: var(--font-main);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 900;
  color: var(--orange);
  line-height: 1;
}

.istat-plus {
  font-family: var(--font-main);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 900;
  color: var(--orange);
}

.istat p {
  color: var(--grey);
  font-size: 12.5px;
  margin-top: 8px;
  line-height: 1.4;
}

/* ══════════════════════
   ACHIEVEMENTS
   ══════════════════════ */
.top-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 52px;
}

.tstat {
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  transition: var(--transition);
}

.tstat:hover {
  border-color: rgba(255,116,56,0.4);
  transform: translateY(-4px);
  background: rgba(255,116,56,0.05);
}

.tstat strong {
  display: block;
  font-family: var(--font-main);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 10px;
}

.tstat strong sup {
  font-size: 0.5em;
  vertical-align: super;
}

.tstat span {
  color: var(--grey);
  font-size: 13px;
  line-height: 1.5;
}

.achieve-group-title {
  font-family: var(--font-main);
  font-size: clamp(1.3rem, 2.5vw, 2rem);
  font-weight: 700;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
}

.achieve-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 0;
}

.achieve-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 26px 22px 22px;
  transition: var(--transition);
  overflow: hidden;
}

.achieve-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--orange), transparent);
  opacity: 0;
  transition: var(--transition);
}

.achieve-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255,116,56,0.4);
  background: rgba(255,116,56,0.04);
}

.achieve-card:hover::before { opacity: 1; }

.achieve-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.achieve-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.achieve-badge--gold   { background: rgba(251,191,36,0.15); color: #fbbf24; border: 1px solid rgba(251,191,36,0.3); }
.achieve-badge--silver { background: rgba(148,163,184,0.15); color: #94a3b8; border: 1px solid rgba(148,163,184,0.3); }
.achieve-badge--bronze { background: rgba(180,83,9,0.15); color: #f97316; border: 1px solid rgba(180,83,9,0.3); }
.achieve-badge--special { background: rgba(0,212,255,0.1); color: var(--cyan); border: 1px solid rgba(0,212,255,0.25); }

.achieve-card h4 {
  font-family: var(--font-main);
  font-size: 15.5px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
  padding-right: 60px;
}

.achieve-card p { color: var(--grey); font-size: 13.5px; line-height: 1.7; }

.achieve-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.achieve-tags span {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid rgba(255,116,56,0.2);
  color: var(--grey);
  background: rgba(255,116,56,0.04);
}

/* Timeline */
.timeline {
  display: grid;
  gap: 12px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 20px;
  padding: 20px 22px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  transition: var(--transition);
}

.timeline-item:hover {
  border-color: rgba(255,116,56,0.32);
  background: rgba(255,116,56,0.03);
}

.timeline-year {
  color: var(--orange);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding-top: 2px;
  line-height: 1.4;
}

.timeline-body h4 {
  font-family: var(--font-main);
  font-size: 16.5px;
  font-weight: 700;
  margin-bottom: 6px;
}

.timeline-body p { color: var(--grey); font-size: 13.5px; line-height: 1.7; }

/* ══════════════════════
   PROJECTS
   ══════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255,116,56,0.4);
  box-shadow: 0 16px 48px rgba(255,116,56,0.1);
}

.project-card--featured {
  grid-column: span 2;
}

.project-img {
  position: relative;
  height: 180px;
  background: linear-gradient(135deg, rgba(255,116,56,0.08), rgba(0,212,255,0.05));
  overflow: hidden;
}

.project-card--featured .project-img { height: 220px; }

.project-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%);
  transition: filter 0.4s ease, transform 0.4s ease;
}

.project-card:hover .project-img img {
  filter: grayscale(0%);
  transform: scale(1.04);
}

.project-img-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,116,56,0.2);
}

.project-img-placeholder svg {
  width: 56px;
  height: 56px;
}

.project-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ptag {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,116,56,0.2);
  color: var(--grey);
}

.ptag--highlight {
  background: rgba(255,116,56,0.12);
  border-color: rgba(255,116,56,0.35);
  color: var(--orange);
}

.project-body h3 {
  font-family: var(--font-main);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.25;
}

.project-body p { color: var(--grey); font-size: 13.5px; line-height: 1.7; flex: 1; }

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.project-tech span {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.15);
  color: rgba(0,212,255,0.7);
}

.project-role {
  font-size: 12px;
  color: var(--orange);
  font-weight: 600;
  margin-top: auto;
}

/* ══════════════════════
   ORGANIZATIONS
   ══════════════════════ */
.org-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 16px;
}

.org-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.org-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,116,56,0.35);
}

.org-card--main {
  border-color: rgba(255,116,56,0.28);
  background: rgba(255,116,56,0.03);
}

.org-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.org-logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  padding: 6px;
  flex-shrink: 0;
}

.org-header h3 {
  font-family: var(--font-main);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.org-role {
  font-size: 12.5px;
  color: var(--orange);
  font-weight: 600;
  letter-spacing: 0.3px;
}

.org-card p { color: var(--grey); font-size: 14px; line-height: 1.75; }

.org-card h3 {
  font-family: var(--font-main);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.org-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 6px;
}

.ostat {
  border: 1px solid rgba(255,116,56,0.14);
  border-radius: var(--radius-sm);
  padding: 14px;
  background: rgba(255,116,56,0.02);
}

.ostat strong {
  display: block;
  font-family: var(--font-main);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--orange);
  margin-bottom: 2px;
}

.ostat span { color: var(--grey); font-size: 12px; }

.org-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.org-list li {
  color: var(--grey);
  font-size: 13.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.org-list li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
  flex-shrink: 0;
}

/* ══════════════════════
   SKILLS
   ══════════════════════ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.skill-category {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: var(--transition);
}

.skill-category:hover {
  border-color: rgba(255,116,56,0.32);
  transform: translateY(-3px);
}

.skill-cat-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.skill-category h4 {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--light);
}

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

.skill-chips span {
  font-size: 12.5px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255,116,56,0.2);
  background: rgba(255,116,56,0.04);
  color: var(--grey);
  transition: var(--transition);
}

.skill-chips span:hover {
  border-color: var(--orange);
  color: var(--light);
  background: rgba(255,116,56,0.1);
}

/* ══════════════════════
   GALLERY
   ══════════════════════ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 200px;
  gap: 14px;
}

.gallery-item {
  position: relative;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  background: linear-gradient(135deg, rgba(255,116,56,0.06), rgba(0,212,255,0.04));
}

.gallery-item--large {
  grid-column: span 2;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(15%) brightness(0.9);
  transition: transform 0.5s ease, filter 0.5s ease;
}

.gallery-item:hover img {
  transform: scale(1.06);
  filter: grayscale(0%) brightness(1);
}

.gallery-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 16px;
  background: linear-gradient(to top, rgba(5,5,8,0.95), transparent);
  transform: translateY(6px);
  opacity: 0.7;
  transition: var(--transition);
}

.gallery-item:hover .gallery-caption {
  transform: translateY(0);
  opacity: 1;
}

.gallery-caption h4 {
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 2px;
}

.gallery-caption p { color: var(--grey); font-size: 12px; }

.gallery-item--placeholder::after {
  content: "📷";
  font-size: 40px;
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.3;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.94);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
}

.lightbox.active { display: flex; }

.lightbox img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox p { color: var(--grey); font-size: 14px; }

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 28px;
  color: var(--grey);
  font-size: 24px;
  padding: 8px;
  transition: var(--transition);
}

.lightbox-close:hover { color: var(--orange); }

/* ══════════════════════
   RESEARCH
   ══════════════════════ */
.research-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.research-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.research-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,116,56,0.36);
  background: rgba(255,116,56,0.04);
}

.research-card--featured {
  grid-column: span 2;
  border-color: rgba(0,212,255,0.2);
  background: rgba(0,212,255,0.02);
}

.research-card--featured:hover {
  border-color: rgba(0,212,255,0.38);
}

.research-badge {
  display: inline-flex;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: rgba(0,212,255,0.1);
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.22);
  width: fit-content;
}

.research-card h3 {
  font-family: var(--font-main);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 700;
  line-height: 1.3;
}

.research-card p { color: var(--grey); font-size: 14px; line-height: 1.75; }

.research-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
}

.research-meta span {
  color: var(--light);
  font-size: 12.5px;
  opacity: 0.75;
  padding-left: 10px;
  border-left: 2px solid var(--orange);
  line-height: 1.5;
}

.research-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.research-tech span {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.15);
  color: rgba(0,212,255,0.7);
}

/* ══════════════════════
   CONTACT
   ══════════════════════ */
.contact-box {
  border: 1px solid rgba(255,116,56,0.2);
  border-radius: var(--radius-xl);
  padding: clamp(28px, 5vw, 52px);
  background:
    radial-gradient(ellipse at top right, rgba(255,116,56,0.1), transparent 45%),
    radial-gradient(ellipse at bottom left, rgba(0,212,255,0.05), transparent 45%),
    rgba(255,255,255,0.02);
  backdrop-filter: blur(8px);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  align-items: start;
}

.contact-left h2 {
  font-size: clamp(2.2rem, 6vw, 5rem);
  margin-bottom: 18px;
  letter-spacing: -2px;
}

.contact-left p { color: var(--grey); font-size: 15px; line-height: 1.8; max-width: 420px; }

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 22px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--grey);
  font-size: 14px;
  transition: var(--transition);
}

.contact-link svg { width: 16px; height: 16px; fill: var(--orange); flex-shrink: 0; }

.contact-link:hover { color: var(--light); }

.contact-link--location { cursor: default; }
.contact-link--location:hover { color: var(--grey); }

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--grey);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,116,56,0.18);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  color: var(--light);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
  transition: var(--transition);
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(139,143,168,0.6); }

.form-group input:focus,
.form-group textarea:focus {
  border-color: rgba(255,116,56,0.55);
  background: rgba(255,116,56,0.03);
  box-shadow: 0 0 0 3px rgba(255,116,56,0.08);
}

/* ── Footer ── */
footer {
  padding: 32px 0;
  border-top: 1px solid rgba(255,255,255,0.045);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-left .brand { font-size: 14px; }

.footer-left p {
  font-size: 12px;
  color: #444;
}

.footer-right {
  font-size: 12.5px;
  color: #444;
}

/* ══════════════════════
   SCROLL REVEAL
   ══════════════════════ */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ══════════════════════
   RESPONSIVE
   ══════════════════════ */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr 1fr; }
  .about-story { grid-column: span 2; }
  .org-grid { grid-template-columns: 1fr 1fr; }
  .org-card--main { grid-column: span 2; }
  .top-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }

  .hero-layout { grid-template-columns: 1fr; }
  .hero-photo { align-items: flex-start; margin-top: 36px; }
  .photo-frame { width: min(320px, 100%); }

  .hero-stats { gap: 0; padding: 22px 20px; }
  .hstat-div { display: none; }
  .hstat { min-width: 50%; padding: 10px 0; }

  .section-head { flex-direction: column; align-items: flex-start; }
  .section-desc { max-width: 100%; }

  .about-grid { grid-template-columns: 1fr; }
  .about-story { grid-column: span 1; }
  .impact-stats { grid-template-columns: repeat(2, 1fr); }

  .achieve-grid { grid-template-columns: 1fr 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: 6px; }

  .projects-grid { grid-template-columns: 1fr; }
  .project-card--featured { grid-column: span 1; }

  .org-grid { grid-template-columns: 1fr; }
  .org-card--main { grid-column: span 1; }

  .skills-grid { grid-template-columns: 1fr; }

  .gallery-grid { grid-template-columns: 1fr 1fr; grid-auto-rows: 160px; }
  .gallery-item--large { grid-column: span 2; }

  .research-grid { grid-template-columns: 1fr; }
  .research-card--featured { grid-column: span 1; }

  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 640px) {
  .site { width: min(100% - 32px, 1140px); }

  nav {
    width: min(100% - 24px, 1140px);
    border-radius: 20px;
    padding: 10px 16px;
  }

  .brand span { display: none; }

  .hero { padding: 130px 0 60px; }
  h1 { letter-spacing: -3px; }

  .top-stats { grid-template-columns: 1fr 1fr; }
  .achieve-grid { grid-template-columns: 1fr; }

  .gallery-grid { grid-template-columns: 1fr; grid-auto-rows: 180px; }
  .gallery-item--large { grid-column: span 1; }

  footer { flex-direction: column; align-items: flex-start; }

  .actions .btn { flex: 1; min-width: 0; }

  .gears { width: 220px; height: 220px; right: -100px; bottom: -80px; opacity: 0.08; }

  .org-stats { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 420px) {
  .impact-stats { grid-template-columns: 1fr; }
  .top-stats { grid-template-columns: 1fr; }
  .hero-stats .hstat { min-width: 100%; }
}