/*
  ================================================================
  SHARED STYLESHEET — Nirmaan
  Used by: index.html, services.html, projects.html,
           process.html, technology.html, contact.html
  ================================================================
*/

*, *::before, *::after { box-sizing: border-box; }
html { background-color: #080C14; scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: #080C14;
  color: #F8FAFC;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Grid background */
.grid-bg {
  background-image:
    linear-gradient(rgba(99,102,241,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* Glow orbs */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

/* Glassmorphism */
.glass {
  background: rgba(13,17,23,0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.07);
}

/* Gradient text */
.gradient-text {
  background: linear-gradient(135deg, #818cf8 0%, #6366f1 50%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- NAVBAR ---- */
#navbar { transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s; }
#navbar.scrolled {
  background: rgba(8,12,20,0.88) !important;
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06) !important;
}
.nav-link {
  position: relative; color: #94A3B8; font-size: 0.875rem; font-weight: 500;
  transition: color 0.2s; text-decoration: none;
}
.nav-link::after {
  content: ''; position: absolute; bottom: -3px; left: 0;
  width: 0; height: 1px; background: #6366f1; transition: width 0.25s;
}
.nav-link:hover { color: #F8FAFC; }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link.active { color: #F8FAFC; }

#mobile-menu {
  transition: opacity 0.3s, transform 0.3s;
  opacity: 0; transform: translateY(-10px); pointer-events: none;
}
#mobile-menu.open { opacity: 1; transform: translateY(0); pointer-events: all; }

.hamburger-line {
  display: block; width: 22px; height: 2px;
  background: #F8FAFC; border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
#hamburger.open .line-1 { transform: translateY(6px) rotate(45deg); }
#hamburger.open .line-2 { opacity: 0; }
#hamburger.open .line-3 { transform: translateY(-6px) rotate(-45deg); }

/* ---- BADGE PILL ---- */
.badge-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 13px; border-radius: 100px;
  border: 1px solid rgba(99,102,241,0.3);
  background: rgba(99,102,241,0.08);
  font-size: 0.8rem; font-weight: 500; color: #818cf8;
}
.badge-dot {
  width: 6px; height: 6px; border-radius: 50%; background: #6366f1;
  animation: pulse-dot 2s ease-in-out infinite;
}

/* ---- BUTTONS ---- */
.btn-primary {
  background: linear-gradient(135deg, #6366f1 0%, #818cf8 100%);
  color: white; font-weight: 600; border-radius: 8px;
  transition: all 0.25s; position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center;
  text-decoration: none;
}
.btn-primary::before {
  content: ''; position: absolute; top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.5s;
}
.btn-primary:hover::before { left: 100%; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(99,102,241,0.4); }

.btn-secondary {
  border: 1px solid rgba(255,255,255,0.14); color: #94A3B8; font-weight: 500;
  border-radius: 8px; transition: all 0.25s; background: transparent;
  display: inline-flex; align-items: center; justify-content: center;
  text-decoration: none;
}
.btn-secondary:hover {
  border-color: rgba(255,255,255,0.28); color: #F8FAFC;
  background: rgba(255,255,255,0.04); transform: translateY(-2px);
}

/* ---- PAGE HERO ---- */
.page-hero {
  position: relative; overflow: hidden;
  padding: 86px 0 42px;
}
.page-hero-label {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: #6366f1; margin-bottom: 10px;
}
.page-hero-title {
  font-family: 'Manrope', sans-serif; font-weight: 800;
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  line-height: 1.08; letter-spacing: -0.02em; color: #F8FAFC;
  margin-bottom: 12px;
}
.page-hero-sub {
  color: #94A3B8; font-size: 1.05rem; line-height: 1.6;
  max-width: 560px;
}

/* ---- SERVICE CARDS ---- */
.service-card {
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(13,17,23,0.85);
  border-radius: 16px; padding: 22px;
  transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
  position: relative; overflow: hidden;
  text-decoration: none; display: block;
}
.service-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.06) 0%, transparent 60%);
  opacity: 0; transition: opacity 0.35s;
}
.service-card:hover::before { opacity: 1; }
.service-card:hover {
  border-color: rgba(99,102,241,0.28);
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(0,0,0,0.35), 0 0 0 1px rgba(99,102,241,0.1);
}
.svc-icon {
  width: 42px; height: 42px; border-radius: 10px;
  background: rgba(99,102,241,0.1); border: 1px solid rgba(99,102,241,0.2);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.3s; margin-bottom: 14px; flex-shrink: 0;
}
.service-card:hover .svc-icon {
  background: rgba(99,102,241,0.2);
  box-shadow: 0 0 20px rgba(99,102,241,0.35);
}

/* ---- PROJECT CARDS ---- */
.project-card {
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(13,17,23,0.85); border-radius: 16px;
  overflow: hidden; transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
}
.project-card:hover { border-color: rgba(99,102,241,0.22); transform: translateY(-4px); box-shadow: 0 24px 48px rgba(0,0,0,0.45); }
.proj-img {
  background: linear-gradient(135deg, #0D1117 0%, #111827 100%);
  position: relative; overflow: hidden;
}
.proj-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.07) 0%, transparent 60%);
}

/* ---- STACK / ARCH NODES ---- */
.stack-node {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: 12px;
  background: rgba(13,17,23,0.8);
  border: 1px solid rgba(255,255,255,0.07);
  transition: all 0.3s; cursor: default;
}
.stack-node:hover {
  transform: translateX(6px);
  box-shadow: 0 0 16px rgba(99,102,241,0.15);
}

/* ---- PROCESS STEPS ---- */
.step-circle {
  width: 44px; height: 44px; border-radius: 50%;
  border: 2px solid rgba(99,102,241,0.3);
  background: rgba(99,102,241,0.08);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.3s; position: relative; z-index: 1; flex-shrink: 0;
}
.process-step:hover .step-circle {
  background: #6366f1; box-shadow: 0 0 16px rgba(99,102,241,0.5); border-color: #6366f1;
}

/* ---- WHY CARDS ---- */
.why-card {
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(13,17,23,0.85); border-radius: 14px; padding: 18px;
  transition: all 0.3s;
}
.why-card:hover { border-color: rgba(99,102,241,0.25); transform: translateY(-2px); background: rgba(99,102,241,0.03); }

/* ---- TECH BADGES ---- */
.tech-badge {
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(13,17,23,0.85); border-radius: 10px;
  padding: 8px 14px; display: flex; align-items: center; gap: 8px;
  transition: all 0.25s;
}
.tech-badge:hover {
  border-color: rgba(99,102,241,0.4);
  background: rgba(99,102,241,0.07);
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0,0,0,0.25);
}

/* ---- PRICING ---- */
.pricing-card {
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(13,17,23,0.85); border-radius: 16px; padding: 26px 24px;
  transition: all 0.35s;
}
.pricing-card:hover { border-color: rgba(99,102,241,0.28); transform: translateY(-3px); }
.pricing-card.featured { border-color: rgba(99,102,241,0.4); background: rgba(99,102,241,0.04); box-shadow: 0 0 35px rgba(99,102,241,0.08); }

/* ---- CLIENT CARDS ---- */
.client-card {
  border: 1px solid rgba(255,255,255,0.07); border-radius: 16px;
  background: rgba(13,17,23,0.9); padding: 22px 24px; transition: all 0.3s;
}
.client-card:hover { border-color: rgba(99,102,241,0.28); transform: translateY(-3px); box-shadow: 0 16px 32px rgba(0,0,0,0.35); }

/* ---- FORM FIELDS ---- */
.form-field {
  background: rgba(13,17,23,0.95); border: 1px solid rgba(255,255,255,0.08);
  color: #F8FAFC; border-radius: 8px; padding: 10px 13px; width: 100%;
  font-family: 'Inter', sans-serif; font-size: 0.875rem;
  transition: border-color 0.2s, box-shadow 0.2s; outline: none;
}
.form-field::placeholder { color: #7B8CA6; }
.form-field:focus { border-color: rgba(99,102,241,0.5); box-shadow: 0 0 0 3px rgba(99,102,241,0.1); }
select.form-field option { background: #0D1117; color: #F8FAFC; }

/* ---- SCROLL REVEAL ---- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.rd1 { transition-delay: 0.1s; }
.rd2 { transition-delay: 0.2s; }
.rd3 { transition-delay: 0.3s; }
.rd4 { transition-delay: 0.4s; }
.rd5 { transition-delay: 0.5s; }

/* ---- SECTION DIVIDER ---- */
.s-line { height: 1px; background: linear-gradient(90deg, transparent, rgba(99,102,241,0.25), transparent); }

/* ---- NUMBER ACCENT ---- */
.num { font-family: 'Manrope', sans-serif; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; color: #6366f1; }

/* ---- HERO ANIMATIONS ---- */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes flow {
  0%,100% { opacity: 0.3; }
  50% { opacity: 1; }
}
@keyframes pulse-dot {
  0%,100% { box-shadow: 0 0 6px 1px rgba(99,102,241,0.6); }
  50% { box-shadow: 0 0 14px 3px rgba(99,102,241,0.9); }
}

@keyframes data-flow {
  0% { transform: translateY(-34px); opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { transform: translateY(34px); opacity: 0; }
}
.data-packet {
  animation: data-flow 1.5s linear infinite;
  box-shadow: 0 0 8px currentColor;
}

.hero-title { animation: slideUp 0.9s ease forwards; }
.hero-sub   { animation: slideUp 0.9s 0.2s ease forwards; opacity: 0; }
.hero-cta   { animation: slideUp 0.9s 0.4s ease forwards; opacity: 0; }
.hero-cred  { animation: slideUp 0.9s 0.6s ease forwards; opacity: 0; }
.hero-vis   { animation: slideUp 0.9s 0.3s ease forwards; opacity: 0; }
.arch-node  { animation: float 6s ease-in-out infinite; }
.arch-node:nth-child(2) { animation-delay: 0.5s; }
.arch-node:nth-child(3) { animation-delay: 1s; }
.arch-node:nth-child(4) { animation-delay: 1.5s; }
.arch-node:nth-child(5) { animation-delay: 2s; }
.connector  { animation: flow 2.5s ease-in-out infinite; }
.connector:nth-child(even) { animation-delay: 1.25s; }
.glow-dot   { animation: pulse-dot 2s ease-in-out infinite; }

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #080C14; }
::-webkit-scrollbar-thumb { background: #1e293b; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #334155; }

/* ---- REDUCED MOTION ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---- CTA SECTION ---- */
.cta-section {
  background: linear-gradient(135deg, rgba(99,102,241,0.08) 0%, rgba(99,102,241,0.03) 100%);
  border: 1px solid rgba(99,102,241,0.15); border-radius: 20px;
  padding: 38px 24px; text-align: center; position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 300px; height: 1px; background: linear-gradient(90deg, transparent, rgba(99,102,241,0.5), transparent);
}

/* ---- INFO CARD ---- */
.info-card {
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(13,17,23,0.85); border-radius: 14px; padding: 14px 16px;
  transition: all 0.3s;
}
.info-card:hover { border-color: rgba(99,102,241,0.2); transform: translateY(-2px); }

/* ---- PAGE BREADCRUMB ---- */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.75rem; color: #7B8CA6; margin-bottom: 10px; }
.breadcrumb a { color: #7B8CA6; text-decoration: none; transition: color 0.2s; }
.breadcrumb a:hover { color: #818cf8; }
.breadcrumb-sep { opacity: 0.4; }

/* Mobile nav */
@media (max-width: 640px) {
  .page-hero { padding: 76px 0 32px; }
}

/* ---- PAGE TRANSITIONS ---- */
/* Cross-document View Transitions (Chrome/Edge 126+, Safari 18.2+).
   The page cross-fades with a slight upward drift while the navbar stays put.
   Browsers without support fall back to the fade in page-transitions.js. */
@view-transition { navigation: auto; }

#navbar { view-transition-name: site-nav; }

::view-transition-old(root) {
  animation: 0.22s cubic-bezier(0.4, 0, 1, 1) both vt-page-out;
}
::view-transition-new(root) {
  animation: 0.42s 0.04s cubic-bezier(0, 0, 0.2, 1) both vt-page-in;
}
@keyframes vt-page-out { to   { opacity: 0; transform: translateY(-8px); } }
@keyframes vt-page-in  { from { opacity: 0; transform: translateY(16px); } }
/* Direction-aware: slide the way you are travelling through the menu order (set by page-transitions.js) */
:root[data-vt-dir="forward"]::view-transition-old(root) { animation: 0.22s cubic-bezier(0.4, 0, 1, 1) both vt-out-left; }
:root[data-vt-dir="forward"]::view-transition-new(root) { animation: 0.42s 0.04s cubic-bezier(0, 0, 0.2, 1) both vt-in-right; }
:root[data-vt-dir="back"]::view-transition-old(root)    { animation: 0.22s cubic-bezier(0.4, 0, 1, 1) both vt-out-right; }
:root[data-vt-dir="back"]::view-transition-new(root)    { animation: 0.42s 0.04s cubic-bezier(0, 0, 0.2, 1) both vt-in-left; }
@keyframes vt-out-left  { to   { opacity: 0; transform: translateX(-40px); } }
@keyframes vt-in-right  { from { opacity: 0; transform: translateX(40px); } }
@keyframes vt-out-right { to   { opacity: 0; transform: translateX(40px); } }
@keyframes vt-in-left   { from { opacity: 0; transform: translateX(-40px); } }

/* Fallback: fade only (transform on body would break the fixed navbar) */
html.pt-fallback body { animation: pt-fade-in 0.45s ease-out backwards; }
html.pt-fallback.pt-leaving body { opacity: 0; transition: opacity 0.22s ease-in; }
@keyframes pt-fade-in { from { opacity: 0; } }

@media (prefers-reduced-motion: reduce) {
  @view-transition { navigation: none; }
  html.pt-fallback body { animation: none; }
}

/* ---- LAYERED 3D SCENES (index.html: hero + architecture) ---- */
/* layers-3d.js injects .h3d-stage next to the 2D markup and adds .is-3d once the
   first WebGL frame is drawn. Without it, the 2D cards simply stay visible. */
.h3d-stage {
  position: absolute; left: 0; right: 0; top: -48px; bottom: -48px;
  pointer-events: none; opacity: 0; transition: opacity 0.8s ease;
}
.h3d-stage canvas {
  display: block; width: 100%; height: 100%;
  pointer-events: auto; cursor: grab;
  touch-action: pan-y;               /* horizontal drags rotate, vertical drags still scroll the page */
  -webkit-tap-highlight-color: transparent;
}
[data-layers-3d].is-3d { -webkit-user-select: none; user-select: none; }
[data-layers-3d].is-3d .h3d-stage { opacity: 1; }
[data-layers-3d].is-3d > .l3d-fallback { opacity: 0; visibility: hidden; transition: opacity 0.5s ease, visibility 0s 0.5s; }

/* Labels are <button>s so every layer is reachable by keyboard */
.h3d-label {
  position: absolute; left: 0; top: 0; opacity: 0; display: block; white-space: nowrap;
  padding: 7px 14px 7px 12px; border-radius: 10px; text-align: left;
  font: inherit; color: inherit; appearance: none; -webkit-appearance: none; cursor: pointer; pointer-events: auto;
  background: rgba(13,17,23,0.72);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.08); border-left: 2px solid var(--c);
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.3s ease;
  will-change: transform, opacity;
}
/* leader line and dot from the plate edge to the label */
.h3d-label::before {
  content: ''; position: absolute; right: 100%; top: 50%; width: 28px; height: 1px;
  background: var(--c); opacity: 0.5; transition: opacity 0.2s ease;
}
.h3d-label::after {
  content: ''; position: absolute; right: calc(100% + 26px); top: 50%; width: 5px; height: 5px;
  margin-top: -2px; border-radius: 50%; background: var(--c); box-shadow: 0 0 8px var(--c);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.h3d-label.is-hover, .h3d-label:focus-visible {
  background: rgba(17,24,39,0.92); border-color: rgba(255,255,255,0.2); border-left-color: var(--c);
  box-shadow: 0 0 22px -8px var(--c);
}
.h3d-label.is-hover::before, .h3d-label:focus-visible::before, .h3d-label.is-sel::before { opacity: 1; }
.h3d-label.is-hover::after, .h3d-label:focus-visible::after, .h3d-label.is-sel::after {
  transform: scale(1.6); box-shadow: 0 0 14px var(--c);
}
.h3d-label:focus-visible { outline: 2px solid var(--c); outline-offset: 3px; }

.h3d-title { display: block; font-size: 0.75rem; line-height: 1.3; font-weight: 600; color: #F8FAFC; }
.h3d-sub   { display: block; font-size: 10px;  line-height: 1.3; color: #64748B; }
.h3d-desc  {
  display: block; font-size: 10px; line-height: 1.55; color: #94A3B8; white-space: normal;
  width: 0; min-width: 100%;          /* adds nothing to the label's natural width; wraps to it instead */
  max-height: 0; opacity: 0; margin-top: 0; overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.3s ease, margin-top 0.3s ease;
}
/* selected layer: label grows to show what it does */
.h3d-label.is-sel {
  width: var(--h3d-sel-w, 200px); white-space: normal;
  background: rgba(17,24,39,0.95); border-color: rgba(255,255,255,0.16); border-left-color: var(--c);
  box-shadow: 0 0 30px -6px var(--c);
}
.h3d-label.is-sel .h3d-desc { max-height: 96px; opacity: 1; margin-top: 6px; }

/* one-line hint, dismissed on first interaction */
.h3d-hint {
  position: absolute; left: 50%; bottom: 8px; transform: translateX(-50%);
  padding: 5px 12px; border-radius: 100px; white-space: nowrap;
  font-size: 11px; letter-spacing: 0.02em; color: #64748B;
  background: rgba(13,17,23,0.6); border: 1px solid rgba(255,255,255,0.07);
  opacity: 0; transition: opacity 0.6s ease; pointer-events: none;
}
.h3d-hint.show { opacity: 1; }

/* Phone layout: labels are replaced by one detail card under the scene */
.h3d-detail {
  display: none; position: absolute; left: 50%; bottom: 8px; transform: translateX(-50%);
  width: min(calc(100% - 32px), 340px); min-height: 86px; box-sizing: border-box;
  padding: 12px 16px; border-radius: 12px; text-align: left;
  background: rgba(17,24,39,0.92); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1); border-left: 2px solid var(--c, #6366f1);
  box-shadow: 0 0 30px -10px var(--c, #6366f1); pointer-events: none;
}
.h3d-detail.is-empty { display: none; border-left-color: rgba(255,255,255,0.1); box-shadow: none; }
.h3d-detail .h3d-desc-static { display: block; margin-top: 6px; font-size: 11px; line-height: 1.55; color: #94A3B8; }
.h3d-stage.is-compact .h3d-detail { display: block; }
.h3d-stage.is-compact .h3d-detail.is-empty {
  display: flex; align-items: center; justify-content: center; min-height: 0; padding: 8px 14px;
  width: auto; border-radius: 100px; background: rgba(13,17,23,0.6); box-shadow: none; border-color: rgba(255,255,255,0.07);
}
.h3d-stage.is-compact .h3d-label { opacity: 0 !important; pointer-events: none; }   /* still focusable for keyboard / screen reader users */
.h3d-stage.is-compact .h3d-hint { display: none; }

/* ---- CARD TILT (tilt.js) ---- */
.project-card { position: relative; }
.tilt-glare {
  position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity 0.3s ease;
  background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 50%), rgba(255,255,255,0.09), transparent 45%);
}
/* Same lift as the normal :hover rule, plus the lean. Later in the file, so it wins. */
.service-card.is-tilting, .project-card.is-tilting {
  transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(-4px);
  transition: transform 0.12s ease-out, border-color 0.35s ease, box-shadow 0.35s ease, background 0.35s ease;
  will-change: transform;
}
.is-tilting > .tilt-glare { opacity: 1; }