/* ============================================================
   shared.css — global variables, reset, nav, utilities
   Manthan Chauhan Portfolio
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&family=Playfair+Display:ital,wght@0,500;0,700;1,500&family=Bebas+Neue&family=Space+Grotesk:wght@300;400;600;700&display=swap');

/* ── CSS Variables ───────────────────────────────────────── */
:root {
  --bg-main:       #080810;
  --bg-sec:        #0d0d1f;
  --bg-card:       rgba(255,255,255,0.04);
  --border:        rgba(255,255,255,0.08);
  --border-hover:  rgba(255,255,255,0.2);

  --green:         #9eff5a;
  --red:           #ff5c7a;
  --blue:          #38d1f5;
  --black:         #050507;

  --text:          #e8e8f4;
  --text-muted:    #7070a0;
  --text-dim:      #4a4a70;

  --nav-h:         68px;

  --f-heading:     'Syne', sans-serif;
  --f-body:        'DM Sans', sans-serif;
  --f-serif:       'Playfair Display', serif;
  --f-display:     'Bebas Neue', cursive;
  --f-alt:         'Space Grotesk', sans-serif;

  --ease:          cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-green:  0 0 30px rgba(158,255,90,0.15);
  --shadow-red:    0 0 30px rgba(255,92,122,0.15);
  --shadow-blue:   0 0 30px rgba(56,209,245,0.15);
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--f-body);
  background: var(--bg-main);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.65;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }

/* ── Animated Background ─────────────────────────────────── */
.bg-wrap {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.bg-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 15% 20%, rgba(158,255,90,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 75%, rgba(56,209,245,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(255,92,122,0.05) 0%, transparent 50%);
  animation: bg-drift 25s ease-in-out infinite alternate;
}
.bg-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(255,255,255,0.04) 1px, transparent 0);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}
@keyframes bg-drift {
  0%   { opacity: 0.8; transform: scale(1) rotate(0deg); }
  50%  { opacity: 1;   transform: scale(1.05) rotate(0.5deg); }
  100% { opacity: 0.8; transform: scale(1) rotate(-0.5deg); }
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.12;
  will-change: transform;
}
.orb-g { width: 600px; height: 600px; background: var(--green); top: -200px; left: -150px; animation: orb-float1 30s ease-in-out infinite; }
.orb-r { width: 500px; height: 500px; background: var(--red);   bottom: -150px; right: -100px; animation: orb-float2 35s ease-in-out infinite; }
.orb-b { width: 400px; height: 400px; background: var(--blue);  top: 40%; left: 55%; animation: orb-float3 28s ease-in-out infinite; }
@keyframes orb-float1 { 0%,100%{transform:translate(0,0)}  33%{transform:translate(80px,-60px)}  66%{transform:translate(-40px,120px)} }
@keyframes orb-float2 { 0%,100%{transform:translate(0,0)}  33%{transform:translate(-100px,50px)} 66%{transform:translate(60px,-80px)}  }
@keyframes orb-float3 { 0%,100%{transform:translate(0,0)}  50%{transform:translate(-80px,60px)}  }

/* ── Navigation ──────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5vw;
  background: rgba(8,8,16,0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.4s var(--ease);
}
.nav.scrolled { background: rgba(8,8,16,0.92); }

.nav-logo {
  font-family: var(--f-heading);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  transition: color 0.3s;
}
.nav-logo span { color: var(--green); }
.nav-logo:hover { color: var(--green); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}
.nav-links a {
  font-family: var(--f-alt);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  transition: color 0.3s var(--ease);
  padding: 4px 0;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--green);
  transition: width 0.35s var(--ease-out);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  font-family: var(--f-alt);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--black) !important;
  background: var(--green);
  padding: 10px 22px;
  border-radius: 4px;
  transition: background 0.3s, transform 0.3s, box-shadow 0.3s !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover {
  background: #b4ff70 !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(158,255,90,0.3) !important;
}

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-burger span {
  display: block;
  width: 26px; height: 2px;
  background: var(--text);
  transition: transform 0.35s var(--ease), opacity 0.3s;
}

/* mobile nav */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-burger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(8,8,16,0.97);
    backdrop-filter: blur(20px);
    padding: 2rem 5vw;
    gap: 1.8rem;
    border-bottom: 1px solid var(--border);
  }
}

/* ── Utility Classes ─────────────────────────────────────── */
.container { width: min(1180px, 92vw); margin: 0 auto; }

.section-label {
  font-family: var(--f-alt);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--green);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 28px; height: 2px;
  background: var(--green);
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* stagger children */
.stagger > * { opacity: 0; transform: translateY(30px); }
.stagger.visible > *:nth-child(1)  { opacity:1; transform:none; transition: opacity .6s .05s var(--ease-out), transform .6s .05s var(--ease-out); }
.stagger.visible > *:nth-child(2)  { opacity:1; transform:none; transition: opacity .6s .15s var(--ease-out), transform .6s .15s var(--ease-out); }
.stagger.visible > *:nth-child(3)  { opacity:1; transform:none; transition: opacity .6s .25s var(--ease-out), transform .6s .25s var(--ease-out); }
.stagger.visible > *:nth-child(4)  { opacity:1; transform:none; transition: opacity .6s .35s var(--ease-out), transform .6s .35s var(--ease-out); }
.stagger.visible > *:nth-child(5)  { opacity:1; transform:none; transition: opacity .6s .45s var(--ease-out), transform .6s .45s var(--ease-out); }
.stagger.visible > *:nth-child(6)  { opacity:1; transform:none; transition: opacity .6s .55s var(--ease-out), transform .6s .55s var(--ease-out); }
.stagger.visible > *:nth-child(n+7){ opacity:1; transform:none; transition: opacity .6s .65s var(--ease-out), transform .6s .65s var(--ease-out); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--f-alt);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 14px 30px;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  transition: color 0.3s, transform 0.3s var(--ease), box-shadow 0.3s;
  cursor: pointer;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  transform: translateX(-101%);
  transition: transform 0.45s var(--ease-out);
}
.btn:hover::before { transform: translateX(0); }
.btn:hover { transform: translateY(-3px); }
.btn:active { transform: translateY(-1px); }

.btn-primary {
  border: 2px solid var(--green);
  color: var(--green);
}
.btn-primary::before { background: var(--green); }
.btn-primary:hover { color: var(--black); box-shadow: var(--shadow-green); }

.btn-secondary {
  border: 2px solid var(--blue);
  color: var(--blue);
}
.btn-secondary::before { background: var(--blue); }
.btn-secondary:hover { color: var(--black); box-shadow: var(--shadow-blue); }

.btn-red {
  border: 2px solid var(--red);
  color: var(--red);
}
.btn-red::before { background: var(--red); }
.btn-red:hover { color: var(--black); box-shadow: var(--shadow-red); }

/* Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  backdrop-filter: blur(12px);
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s var(--ease);
}
.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

/* Tag pill */
.tag {
  display: inline-block;
  font-family: var(--f-alt);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid;
}
.tag-green { border-color: var(--green); color: var(--green); }
.tag-red   { border-color: var(--red);   color: var(--red);   }
.tag-blue  { border-color: var(--blue);  color: var(--blue);  }

/* Image Slider */
.slider-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.slider-track {
  display: flex;
  transition: transform 0.5s var(--ease-out);
}
.slide {
  min-width: 100%;
  aspect-ratio: 16/9;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.5rem;
  border-right: 1px solid var(--border);
}
.slide .slide-placeholder {
  font-family: var(--f-display);
  font-size: 2rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
}
.slide .slide-num {
  font-family: var(--f-alt);
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.12em;
}
.slider-btn {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(8,8,16,0.7);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  z-index: 5;
  transition: background 0.3s, border-color 0.3s, transform 0.3s;
  backdrop-filter: blur(8px);
}
.slider-btn:hover { background: var(--green); border-color: var(--green); color: var(--black); transform: translateY(-50%) scale(1.1); }
.slider-prev { left: 14px; }
.slider-next { right: 14px; }
.slider-dots {
  display: flex; gap: 6px; justify-content: center;
  padding: 12px 0 8px;
}
.slider-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-dim);
  cursor: pointer;
  transition: background 0.3s, transform 0.3s;
}
.slider-dot.active { background: var(--green); transform: scale(1.4); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-main); }
::-webkit-scrollbar-thumb { background: var(--text-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--green); }

/* Footer */
.footer {
  padding: 2rem 5vw;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--f-alt);
  font-size: 0.78rem;
  color: var(--text-dim);
  position: relative;
  z-index: 2;
}
.footer a { color: var(--green); transition: opacity 0.3s; }
.footer a:hover { opacity: 0.7; }

/* Page wrapper */
.page-wrap {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}