/* ============================================================
   Md Kamran Hosan — Portfolio
   Theme: Dark futuristic / glassmorphism / premium animations
   ============================================================ */

:root {
  --bg: #07090F;
  --bg-soft: #0B101B;
  --card: rgba(255, 255, 255, 0.04);
  --card-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(96, 165, 250, 0.45);
  --text: #ffffff;
  --text-muted: #9aa3b5;
  --accent-1: #3B82F6;
  --accent-2: #06B6D4;
  --accent-3: #60A5FA;
  --gradient: linear-gradient(135deg, #3B82F6 0%, #06B6D4 50%, #60A5FA 100%);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --glass-blur: 14px;
  --font-head: 'Sora', 'Poppins', sans-serif;
  --font-body: 'Inter', 'Poppins', sans-serif;
  --nav-h: 74px;
}

html[data-theme="light"] {
  --bg: #f3f6fb;
  --bg-soft: #ffffff;
  --card: rgba(15, 23, 42, 0.05);
  --card-hover: rgba(15, 23, 42, 0.09);
  --border: rgba(15, 23, 42, 0.1);
  --border-hover: rgba(59, 130, 246, 0.5);
  --text: #0f172a;
  --text-muted: #55607a;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.12);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.65;
  transition: background 0.5s ease, color 0.5s ease;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent-1); color: #fff; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--accent-1), var(--accent-2));
  border-radius: 10px;
}

h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.25; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  width: min(1200px, 92%);
  margin-inline: auto;
}

.section { position: relative; padding: 110px 0; }

/* ================= BACKGROUNDS ================= */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -3;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 75%);
  pointer-events: none;
}

.bg-aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(600px 400px at 15% 10%, rgba(59,130,246,0.12), transparent 65%),
    radial-gradient(700px 500px at 85% 20%, rgba(6,182,212,0.10), transparent 65%),
    radial-gradient(600px 500px at 50% 90%, rgba(96,165,250,0.08), transparent 65%);
  pointer-events: none;
}

/* ================= PRELOADER ================= */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background: var(--bg);
  transition: opacity 0.7s ease, visibility 0.7s ease;
}
#preloader.hidden { opacity: 0; visibility: hidden; }

.loader { position: relative; width: 96px; height: 96px; display: grid; place-items: center; }
.loader-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: var(--accent-1);
  border-right-color: var(--accent-2);
  animation: spin 1s linear infinite;
}
.loader-ring::after {
  content: '';
  position: absolute;
  inset: 9px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-bottom-color: var(--accent-3);
  animation: spin 1.4s linear infinite reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loader-text {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: pulse 1.2s ease-in-out infinite;
}
.loader-sub { color: var(--text-muted); font-size: 0.85rem; letter-spacing: 3px; text-transform: uppercase; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* ================= SCROLL PROGRESS ================= */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 2000;
  background: var(--gradient);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.7);
}

/* ================= CURSOR ================= */
#cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 420px; height: 420px;
  z-index: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,0.10), rgba(6,182,212,0.05) 45%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
}
#cursor-dot {
  position: fixed;
  top: 0; left: 0;
  width: 10px; height: 10px;
  z-index: 3000;
  border-radius: 50%;
  background: #fff;
  pointer-events: none;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 12px var(--accent-2);
  mix-blend-mode: difference;
}
#cursor-dot.hovering { width: 44px; height: 44px; background: transparent; border: 1.5px solid var(--accent-2); }
#cursor-dot { transition: width 0.25s ease, height 0.25s ease, background 0.25s ease; }
#cursor-trail {
  position: fixed;
  top: 0; left: 0;
  z-index: 2999;
  pointer-events: none;
}
@media (hover: none), (pointer: coarse) {
  #cursor-glow, #cursor-dot, #cursor-trail { display: none; }
}

/* ================= NAVBAR ================= */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}
#navbar.scrolled {
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}
.nav-inner {
  width: min(1200px, 92%);
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  color: #fff;
  background: var(--gradient);
  padding: 8px 12px;
  border-radius: 10px;
  box-shadow: 0 0 18px rgba(59,130,246,0.45);
}
html[data-theme="light"] .brand-logo { color: #fff; }
.brand-name { font-family: var(--font-head); font-weight: 800; font-size: 1.3rem; letter-spacing: -0.5px; }
.brand-dot { color: var(--accent-2); }

#nav-menu { display: flex; gap: 6px; }
.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color 0.3s ease, background 0.3s ease;
}
.nav-link:hover { color: var(--text); background: var(--card); }
.nav-link::after {
  content: '';
  position: absolute;
  left: 50%; bottom: 2px;
  width: 0; height: 2px;
  background: var(--gradient);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width 0.3s ease;
}
.nav-link.active { color: var(--text); }
.nav-link.active::after { width: 60%; }

.nav-actions { display: flex; align-items: center; gap: 12px; }
.icon-btn {
  width: 42px; height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}
.icon-btn:hover { border-color: var(--border-hover); box-shadow: 0 0 16px rgba(59,130,246,0.35); transform: translateY(-2px); }

.menu-btn { display: none; }
.hamburger { display: flex; flex-direction: column; gap: 4px; }
.hamburger i { width: 18px; height: 2px; background: currentColor; border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; }
.menu-btn.open .hamburger i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-btn.open .hamburger i:nth-child(2) { opacity: 0; }
.menu-btn.open .hamburger i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: 14px;
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}
.btn-sm { padding: 9px 18px; font-size: 0.82rem; }

.btn-glow {
  position: relative;
  background: var(--gradient);
  color: #fff;
  background-size: 200% 200%;
  animation: gradientShift 6s ease infinite;
  box-shadow: 0 8px 28px rgba(59,130,246,0.4);
}
.btn-glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 16px;
  background: var(--gradient);
  filter: blur(16px);
  opacity: 0.5;
  z-index: -1;
  transition: opacity 0.3s ease;
}
.btn-glow:hover { transform: translateY(-3px); box-shadow: 0 14px 40px rgba(59,130,246,0.55); }
.btn-glow:hover::before { opacity: 0.9; }
@keyframes gradientShift { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }

.btn-outline {
  background: transparent;
  border-color: var(--border-hover);
  color: var(--text);
}
.btn-outline:hover {
  background: var(--card-hover);
  border-color: var(--accent-1);
  box-shadow: 0 0 22px rgba(59,130,246,0.35);
  transform: translateY(-3px);
}
.btn-ghost { background: var(--card); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--card-hover); transform: translateY(-3px); }
.btn-block { width: 100%; }

/* ================= SECTION HEADERS ================= */
.section-head { text-align: center; margin-bottom: 60px; }
.section-tag {
  display: inline-block;
  padding: 7px 18px;
  border-radius: 40px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-3);
  background: rgba(59,130,246,0.12);
  border: 1px solid rgba(59,130,246,0.25);
  margin-bottom: 18px;
}
.section-title { font-size: clamp(2rem, 4.5vw, 2.9rem); font-weight: 800; letter-spacing: -1px; }
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-line {
  width: 90px; height: 4px;
  margin: 22px auto 0;
  border-radius: 4px;
  background: var(--gradient);
  position: relative;
}
.section-line::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 4px;
  background: inherit;
  filter: blur(8px);
  opacity: 0.7;
}

/* ================= GLASS ================= */
.glass {
  background: var(--card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border);
  border-radius: 20px;
}

/* ================= TILT ================= */
.tilt { transform-style: preserve-3d; transition: transform 0.15s ease-out; will-change: transform; }

/* ================= HERO ================= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-h) + 40px) 0 60px;
}
#particles-js {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--card);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  margin-bottom: 26px;
}
.status-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34,197,94,0.7);
  animation: ping 1.6s infinite;
}
@keyframes ping {
  0% { box-shadow: 0 0 0 0 rgba(34,197,94,0.7); }
  70% { box-shadow: 0 0 0 12px rgba(34,197,94,0); }
  100% { box-shadow: 0 0 0 0 rgba(34,197,94,0); }
}

.hero-title { font-size: clamp(2.6rem, 6vw, 4.3rem); font-weight: 800; letter-spacing: -2px; margin-bottom: 10px; }
.hero-role {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-head);
  font-size: clamp(1.1rem, 2.4vw, 1.6rem);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}
.role-icon {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  color: #fff;
  background: var(--gradient);
  box-shadow: 0 0 20px rgba(59,130,246,0.5);
  animation: floaty 4s ease-in-out infinite;
}

.typed-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 500;
  color: var(--accent-3);
  min-height: 2em;
  margin-bottom: 22px;
}
.typed-prefix { color: var(--accent-2); }
.typed-caret {
  width: 2px;
  height: 1.2em;
  background: var(--accent-2);
  animation: blink 0.9s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-desc {
  max-width: 560px;
  color: var(--text-muted);
  font-size: 1.02rem;
  margin-bottom: 32px;
}

.hero-btns { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }

.hero-socials { display: flex; gap: 12px; }
.social-link {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  font-size: 1.05rem;
  color: var(--text-muted);
  background: var(--card);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}
.social-link:hover {
  color: #fff;
  background: var(--gradient);
  border-color: transparent;
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(59,130,246,0.45);
}

/* Hero visual */
.hero-visual { position: relative; display: flex; justify-content: center; }
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  z-index: 0;
  animation: orbFloat 8s ease-in-out infinite;
}
.orb-1 { width: 300px; height: 300px; background: rgba(59,130,246,0.5); top: -30px; right: -40px; }
.orb-2 { width: 220px; height: 220px; background: rgba(6,182,212,0.45); bottom: -20px; left: -30px; animation-delay: -4s; }
@keyframes orbFloat { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-24px); } }

.profile-frame { position: relative; z-index: 2; }
.profile-ring {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid rgba(96,165,250,0.35);
  animation: ringPulse 4s ease-in-out infinite;
}
.ring-a { inset: -26px; border-top-color: var(--accent-1); border-right-color: var(--accent-2); }
.ring-b { inset: -48px; border-bottom-color: var(--accent-2); border-left-color: var(--accent-1); animation-delay: -2s; }
@keyframes ringPulse {
  0%,100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.06); opacity: 0.5; }
}
.profile-img {
  width: min(330px, 72vw);
  aspect-ratio: 1;
  border-radius: 50%;
  padding: 6px;
  background: var(--gradient);
  background-size: 200% 200%;
  animation: gradientShift 6s ease infinite;
  box-shadow: 0 0 60px rgba(59,130,246,0.55), 0 30px 60px rgba(0,0,0,0.5);
  position: relative;
}
.profile-img::before {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--bg);
}
.profile-img img {
  position: absolute;
  inset: 14px;
  width: calc(100% - 28px);
  height: calc(100% - 28px);
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(255,255,255,0.15);
}

.floating-chip {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 14px;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-head);
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.35);
  z-index: 3;
  animation: floaty 5s ease-in-out infinite;
}
.floating-chip i { color: var(--accent-2); font-size: 1rem; }
.chip-1 { top: 6%; left: -14%; animation-delay: 0s; }
.chip-2 { top: 38%; right: -16%; animation-delay: -1.4s; }
.chip-3 { bottom: 16%; left: -10%; animation-delay: -2.6s; }
.chip-4 { bottom: -4%; right: 2%; animation-delay: -3.6s; }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

.hero-scroll {
  position: absolute;
  bottom: -50px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-muted);
  z-index: 3;
}
.mouse {
  width: 26px; height: 42px;
  border: 2px solid var(--text-muted);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 7px;
}
.wheel {
  width: 4px; height: 8px;
  border-radius: 4px;
  background: var(--accent-2);
  animation: wheelMove 1.6s ease-in-out infinite;
}
@keyframes wheelMove {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

/* ================= ABOUT ================= */
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.about-card { padding: 34px 28px; position: relative; overflow: hidden; }
.about-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}
.about-card:hover::before { transform: scaleX(1); }
.about-icon {
  width: 54px; height: 54px;
  display: grid; place-items: center;
  border-radius: 14px;
  font-size: 1.4rem;
  color: #fff;
  background: var(--gradient);
  margin-bottom: 20px;
  box-shadow: 0 8px 22px rgba(59,130,246,0.4);
}
.about-card p { color: var(--text-muted); font-size: 0.98rem; margin-bottom: 12px; }
.about-card p:last-child { margin-bottom: 0; }
.about-card strong { color: var(--text); }

/* ================= STATS ================= */
.stats { padding-top: 40px; padding-bottom: 40px; }
.stats-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.stat {
  padding: 36px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.stat::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(59,130,246,0.15), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
}
.stat:hover::after { opacity: 1; }
.stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 6px;
}
.stat-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }

/* ================= EXPERTISE ================= */
.expertise-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.ex-card {
  padding: 26px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.ex-icon {
  width: 52px; height: 52px;
  display: inline-grid; place-items: center;
  font-size: 1.3rem;
  color: var(--accent-3);
  border-radius: 14px;
  background: rgba(59,130,246,0.12);
  margin-bottom: 14px;
  transition: all 0.4s ease;
}
.ex-card h3 { font-size: 0.98rem; font-weight: 600; margin-bottom: 6px; }
.ex-card p { font-size: 0.8rem; color: var(--text-muted); }
.ex-card:hover .ex-icon {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 22px rgba(59,130,246,0.5);
  transform: rotate(-6deg) scale(1.1);
}
.ex-card:hover { border-color: var(--border-hover); box-shadow: 0 16px 40px rgba(0,0,0,0.3); }

/* ================= PROJECTS ================= */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 44px;
}
.filter-btn {
  padding: 10px 22px;
  border-radius: 40px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-head);
  cursor: pointer;
  color: var(--text-muted);
  background: var(--card);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}
.filter-btn:hover { color: var(--text); border-color: var(--border-hover); }
.filter-btn.active {
  color: #fff;
  background: var(--gradient);
  border-color: transparent;
  box-shadow: 0 8px 24px rgba(59,130,246,0.45);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 26px;
}
.project-card {
  padding: 30px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.project-card::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -40%;
  width: 70%;
  height: 70%;
  background: radial-gradient(circle, rgba(59,130,246,0.18), transparent 70%);
  transition: transform 0.5s ease;
  z-index: 0;
}
.project-card:hover::before { transform: scale(1.6); }
.project-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; position: relative; z-index: 1; }
.project-badge {
  padding: 5px 14px;
  border-radius: 30px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent-3);
  background: rgba(59,130,246,0.12);
  border: 1px solid rgba(59,130,246,0.3);
}
.project-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  font-size: 1.4rem;
  color: #fff;
  background: var(--gradient);
  border-radius: 14px;
  box-shadow: 0 8px 22px rgba(59,130,246,0.45);
}
.project-card h3 { font-size: 1.25rem; margin-bottom: 10px; position: relative; z-index: 1; }
.project-desc { color: var(--text-muted); font-size: 0.92rem; margin-bottom: 16px; position: relative; z-index: 1; }
.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  position: relative;
  z-index: 1;
}
.feature-list li {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 30px;
  color: var(--text-muted);
  background: var(--card);
  border: 1px solid var(--border);
}
.feature-list li:hover { color: var(--accent-3); border-color: var(--border-hover); }
.project-note {
  margin-top: auto;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 0.82rem;
  color: var(--accent-3);
  background: rgba(6,182,212,0.08);
  border: 1px solid rgba(6,182,212,0.2);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.project-links { display: flex; gap: 12px; position: relative; z-index: 1; }
.link-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  padding: 9px 16px;
  border-radius: 10px;
  background: var(--card-hover);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}
.link-chip:hover { color: #fff; background: var(--gradient); border-color: transparent; box-shadow: 0 8px 20px rgba(59,130,246,0.4); }

.project-card.hide { display: none; }

/* ================= SERVICES ================= */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.service-card {
  padding: 30px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: transform 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}
.service-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 0; height: 3px;
  background: var(--gradient);
  transition: width 0.4s ease;
}
.service-card:hover::after { width: 80%; }
.svc-icon {
  width: 62px; height: 62px;
  margin: 0 auto 18px;
  display: grid; place-items: center;
  font-size: 1.5rem;
  color: var(--accent-3);
  border-radius: 18px;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  transition: all 0.4s ease;
}
.service-card:hover .svc-icon {
  background: var(--gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 10px 26px rgba(59,130,246,0.5);
  transform: translateY(-6px) rotate(6deg);
}
.service-card h3 { font-size: 1.02rem; margin-bottom: 10px; }
.service-card p { font-size: 0.85rem; color: var(--text-muted); }

/* ================= PROCESS / TIMELINE ================= */
.timeline { max-width: 880px; margin-inline: auto; }
.timeline-item {
  padding: 26px 24px;
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 18px;
  align-items: center;
  position: relative;
}
.tl-num {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--accent-2);
  opacity: 0.8;
}
.tl-icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  font-size: 1.2rem;
  color: #fff;
  background: var(--gradient);
  border-radius: 13px;
  box-shadow: 0 8px 20px rgba(59,130,246,0.4);
}
.timeline-item h3 { font-size: 1.05rem; margin-bottom: 4px; }
.timeline-item p { font-size: 0.85rem; color: var(--text-muted); }
.timeline-arrow {
  text-align: center;
  color: var(--accent-2);
  font-size: 1rem;
  padding: 6px 0;
  animation: arrowBob 1.4s ease-in-out infinite;
}
@keyframes arrowBob { 0%,100% { transform: translateY(0); opacity: 0.8; } 50% { transform: translateY(5px); opacity: 1; } }

/* ================= SDLC ================= */
.sdlc-lead {
  max-width: 820px;
  margin: 0 auto 40px;
  padding: 26px 30px;
  text-align: center;
  font-size: 1.02rem;
  color: var(--text-muted);
  border-left: 4px solid var(--accent-1);
}
.sdlc-lead strong { color: var(--text); }
.sdlc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; margin-bottom: 40px; }
.sdlc-item { padding: 28px 24px; position: relative; overflow: hidden; }
.sdlc-item > i { font-size: 1.7rem; color: var(--accent-3); margin-bottom: 14px; }
.sdlc-item h3 { font-size: 1.05rem; margin-bottom: 8px; }
.sdlc-item p { font-size: 0.86rem; color: var(--text-muted); }
.sdlc-idx {
  position: absolute;
  top: 10px; right: 16px;
  font-family: var(--font-head);
  font-size: 2.6rem;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1px rgba(96,165,250,0.3);
  opacity: 0.6;
}
.sdlc-item:hover { border-color: var(--border-hover); box-shadow: 0 14px 36px rgba(0,0,0,0.3); }

.sdlc-benefits { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.benefit { padding: 26px 20px; text-align: center; }
.benefit i {
  width: 56px; height: 56px;
  display: grid; margin: 0 auto 14px; place-items: center;
  font-size: 1.3rem;
  color: var(--accent-2);
  border-radius: 16px;
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.25);
}
.benefit h3 { font-size: 1rem; margin-bottom: 8px; }
.benefit p { font-size: 0.82rem; color: var(--text-muted); }

/* ================= AGILE ================= */
.agile-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; margin-bottom: 40px; }
.agile-item { padding: 30px 20px; text-align: center; }
.agile-icon {
  width: 60px; height: 60px;
  margin: 0 auto 16px;
  display: grid; place-items: center;
  font-size: 1.4rem;
  color: #fff;
  background: var(--gradient);
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(59,130,246,0.15), 0 10px 24px rgba(59,130,246,0.4);
  transition: transform 0.4s ease;
}
.agile-item:hover .agile-icon { transform: scale(1.15) rotate(8deg); }
.agile-item h3 { font-size: 1rem; margin-bottom: 8px; }
.agile-item p { font-size: 0.83rem; color: var(--text-muted); }
.agile-note {
  max-width: 760px;
  margin: 0 auto;
  padding: 30px 34px;
  text-align: center;
  position: relative;
}
.agile-note i { font-size: 2.2rem; color: var(--accent-2); opacity: 0.5; margin-bottom: 12px; display: block; }
.agile-note p { color: var(--text-muted); font-size: 1rem; }

/* ================= WHY ================= */
.why-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.why-card {
  padding: 30px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.why-card i {
  width: 58px; height: 58px;
  margin: 0 auto 16px;
  display: grid; place-items: center;
  font-size: 1.35rem;
  color: var(--accent-3);
  border-radius: 16px;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  transition: all 0.4s ease;
}
.why-card:hover i {
  color: #fff;
  background: var(--gradient);
  border-color: transparent;
  transform: translateY(-5px) scale(1.08);
  box-shadow: 0 10px 26px rgba(59,130,246,0.5);
}
.why-card h3 { font-size: 0.98rem; margin-bottom: 8px; }
.why-card p { font-size: 0.8rem; color: var(--text-muted); }

/* ================= TECH ================= */
.tech-marquee-wrap {
  overflow: hidden;
  position: relative;
  margin-bottom: 22px;
  mask-image: linear-gradient(90deg, transparent, black 12%, black 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 12%, black 88%, transparent);
}
.tech-marquee-wrap.reversed .tech-marquee { animation-direction: reverse; }
.tech-marquee {
  display: flex;
  gap: 18px;
  width: max-content;
  animation: marquee 32s linear infinite;
}
.tech-marquee-wrap:hover .tech-marquee { animation-play-state: paused; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.tech-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 26px;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.tech-item i { font-size: 1.7rem; color: var(--accent-3); }
.tech-item:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 26px rgba(59,130,246,0.35);
  transform: translateY(-4px);
  background: var(--card-hover);
}

/* ================= TESTIMONIALS ================= */
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.testimonial-card { padding: 34px 28px; position: relative; }
.quote-icon {
  position: absolute;
  top: 22px; right: 26px;
  font-size: 2.6rem;
  color: var(--accent-2);
  opacity: 0.2;
}
.stars { color: #fbbf24; font-size: 0.95rem; margin-bottom: 16px; display: flex; gap: 3px; }
.testimonial-card p { color: var(--text-muted); font-size: 1rem; margin-bottom: 24px; }
.testimonial-author { display: flex; align-items: center; gap: 14px; }
.avatar {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  font-size: 1.2rem;
  color: #fff;
  background: var(--gradient);
  border-radius: 50%;
}
.testimonial-author strong { display: block; font-size: 0.95rem; }
.testimonial-author span { font-size: 0.78rem; color: var(--text-muted); }

/* ================= FAQ ================= */
.faq-list { max-width: 800px; margin-inline: auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { overflow: hidden; }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
}
.faq-q i {
  transition: transform 0.4s ease;
  color: var(--accent-3);
  flex-shrink: 0;
}
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease;
}
.faq-a-inner {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.92rem;
}
.faq-item.open { border-color: var(--border-hover); box-shadow: 0 12px 34px rgba(0,0,0,0.25); }

/* ================= CONTACT ================= */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 30px;
  align-items: start;
}
.contact-card {
  padding: 36px 30px;
  text-align: center;
  position: sticky;
  top: calc(var(--nav-h) + 30px);
}
.contact-avatar {
  width: 110px; height: 110px;
  margin: 0 auto 18px;
  border-radius: 50%;
  padding: 4px;
  background: var(--gradient);
  box-shadow: 0 0 30px rgba(59,130,246,0.5);
}
.contact-avatar img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; border: 3px solid var(--bg); }
.contact-card h3 { font-size: 1.4rem; margin-bottom: 4px; }
.contact-role { color: var(--accent-3); font-size: 0.88rem; display: block; margin-bottom: 24px; }
.contact-detail {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  border-top: 1px solid var(--border);
}
.contact-detail i { color: var(--accent-2); width: 18px; }
.contact-detail a:hover { color: var(--accent-3); }
.contact-socials { display: flex; justify-content: center; gap: 10px; margin-top: 20px; }

.contact-form { padding: 36px 32px; margin-bottom: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 600; margin-bottom: 8px; color: var(--text-muted); }
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-1);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.15);
}
#send-btn { position: relative; overflow: hidden; }
#send-btn .btn-icon { transition: transform 0.3s ease; }
#send-btn:hover .btn-icon i { transform: translate(4px, -4px); }
#send-btn.sending { pointer-events: none; opacity: 0.7; }
#send-btn.sent .btn-label::after { content: ' \2713  Message Sent!'; }
.form-status { margin-top: 14px; font-size: 0.88rem; min-height: 1.2em; text-align: center; }
.form-status.error { color: #f87171; }
.form-status.success { color: #4ade80; }

.map-wrap { position: relative; overflow: hidden; padding: 0; border-radius: 20px; }
.map-wrap iframe { width: 100%; height: 320px; border: 0; filter: grayscale(0.3) contrast(1.05); display: block; }
.map-overlay {
  position: absolute;
  bottom: 16px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  border-radius: 40px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  white-space: nowrap;
  z-index: 2;
}
.map-overlay i { color: var(--accent-2); }

/* ================= FOOTER ================= */
.footer {
  position: relative;
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
  overflow: hidden;
}
.footer-aurora {
  position: absolute;
  top: -120px; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 240px;
  background: radial-gradient(ellipse, rgba(59,130,246,0.18), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.footer-brand p { color: var(--text-muted); font-size: 0.92rem; margin-top: 14px; max-width: 280px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links h4 { font-size: 0.95rem; margin-bottom: 8px; }
.footer-links a { color: var(--text-muted); font-size: 0.88rem; transition: color 0.3s ease, transform 0.3s ease; width: fit-content; }
.footer-links a:hover { color: var(--accent-3); transform: translateX(5px); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 26px;
  position: relative;
}
.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }
.footer-socials { display: flex; gap: 10px; }

/* ================= BACK TO TOP ================= */
#back-to-top {
  position: fixed;
  bottom: 26px; right: 26px;
  z-index: 1500;
  width: 48px; height: 48px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--gradient);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(59,130,246,0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity 0.4s ease, visibility 0.4s ease, transform 0.4s ease;
}
#back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
#back-to-top:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(59,130,246,0.6); }

/* ================= MOBILE MENU ================= */
@media (max-width: 1024px) {
  .expertise-grid { grid-template-columns: repeat(3, 1fr); }
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .why-grid { grid-template-columns: repeat(3, 1fr); }
  .agile-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .sdlc-benefits { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; text-align: center; gap: 70px; }
  .hero-content { display: flex; flex-direction: column; align-items: center; }
  .hero-desc { margin-inline: auto; }
  .hero-btns { justify-content: center; }
  .hero-visual { margin-top: 10px; }
  .hero-scroll { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-card { position: static; }
}

@media (max-width: 900px) {
  .menu-btn { display: grid; }
  #nav-menu {
    position: fixed;
    top: var(--nav-h);
    right: 0;
    width: min(320px, 80vw);
    height: calc(100vh - var(--nav-h));
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 24px;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    box-shadow: -20px 0 60px rgba(0,0,0,0.35);
    z-index: 999;
  }
  #nav-menu.open { transform: translateX(0); }
  .nav-link { padding: 14px 18px; font-size: 1rem; border-radius: 12px; }
  .nav-link::after { display: none; }
  .nav-link.active { background: var(--card-hover); }
  .hire-cta { display: none; }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .expertise-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: auto 1fr; gap: 12px; }
  .tl-num { font-size: 1.6rem; }
  .timeline-item .tl-icon { grid-column: 1; grid-row: 1 / span 2; }
  .footer-top { grid-template-columns: 1fr; gap: 26px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .hero-btns .btn { width: 100%; }
}

@media (max-width: 520px) {
  .expertise-grid, .services-grid, .why-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .floating-chip { padding: 8px 12px; font-size: 0.72rem; }
  .chip-1 { left: -4%; }
  .chip-2 { right: -4%; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}