/* ═══════════════════════════════════════════
   NEXCORE — styles.css
   Modern Consulting Website Stylesheet
═══════════════════════════════════════════ */

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

:root {
  --clr-bg:          #080c14;
  --clr-bg2:         #0d1322;
  --clr-surface:     #111827;
  --clr-surface2:    #1a2235;
  --clr-border:      rgba(255,255,255,.07);
  --clr-primary:     #6366f1;
  --clr-primary-h:   #818cf8;
  --clr-accent:      #06b6d4;
  --clr-text:        #e2e8f0;
  --clr-muted:       #94a3b8;
  --clr-white:       #ffffff;
  --font:            'Inter', system-ui, sans-serif;
  --radius:          14px;
  --radius-lg:       22px;
  --shadow:          0 4px 30px rgba(0,0,0,.4);
  --shadow-card:     0 8px 40px rgba(0,0,0,.35);
  --transition:      .3s cubic-bezier(.4,0,.2,1);
  --max-w:           1200px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-bg); }
::-webkit-scrollbar-thumb { background: var(--clr-primary); border-radius: 3px; }

/* ── UTILS ── */
.container { width: 100%; max-width: var(--max-w); margin-inline: auto; padding-inline: clamp(1rem, 5vw, 2.5rem); }
.section { padding-block: clamp(4rem, 8vw, 7rem); }
.gradient-text {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-label {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--clr-primary-h);
  background: rgba(99,102,241,.12);
  border: 1px solid rgba(99,102,241,.25);
  padding: .3rem .9rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}
.section-header { text-align: center; max-width: 700px; margin-inline: auto; margin-bottom: 3.5rem; }
.section-title { font-size: clamp(1.9rem, 4vw, 2.8rem); font-weight: 800; line-height: 1.2; margin-bottom: .75rem; }
.section-subtitle { color: var(--clr-muted); font-size: 1.05rem; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  color: #fff;
  box-shadow: 0 0 20px rgba(99,102,241,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 35px rgba(99,102,241,.55); }
.btn-ghost {
  background: transparent;
  color: var(--clr-text);
  border: 1.5px solid var(--clr-border);
}
.btn-ghost:hover { border-color: var(--clr-primary); color: var(--clr-primary-h); background: rgba(99,102,241,.08); }
.btn-nav {
  background: var(--clr-primary);
  color: #fff;
  padding: .55rem 1.35rem;
  font-size: .875rem;
}
.btn-nav:hover { background: var(--clr-primary-h); transform: translateY(-1px); }
.btn-lg { padding: .9rem 2.25rem; font-size: 1.05rem; }
.btn-full { width: 100%; }

/* ── REVEAL ANIMATION ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ══════════════════════════════════════════
   NAVBAR
══════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.1rem 0;
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(8,12,20,.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--clr-border);
  padding: .7rem 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--clr-white);
  text-decoration: none;
  letter-spacing: -.02em;
}
.logo-img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}
.logo-icon { font-size: 1.5rem; color: var(--clr-primary); }
.logo strong { color: var(--clr-primary-h); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  color: var(--clr-muted);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 500;
  transition: color .2s;
}
.nav-links a:not(.btn-nav):hover { color: var(--clr-white); }

/* hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--clr-text);
  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); }

/* ══════════════════════════════════════════
   HERO
══════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
#heroCanvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 6rem;
  padding-bottom: 4rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
  max-width: 780px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(99,102,241,.12);
  border: 1px solid rgba(99,102,241,.3);
  padding: .45rem 1rem;
  border-radius: 999px;
  font-size: .83rem;
  font-weight: 600;
  color: var(--clr-primary-h);
  animation: fadeSlideDown .8s ease both;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.03em;
  animation: fadeSlideUp .8s .1s ease both;
}
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--clr-muted);
  max-width: 560px;
  animation: fadeSlideUp .8s .2s ease both;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeSlideUp .8s .3s ease both;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  animation: fadeSlideUp .8s .4s ease both;
}
.stat { text-align: center; }
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat span { font-size: 1.5rem; font-weight: 800; color: var(--clr-primary-h); }
.stat p { font-size: .78rem; color: var(--clr-muted); margin-top: -.2rem; }
.stat-divider { width: 1px; height: 40px; background: var(--clr-border); }

.hero-scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
}
.scroll-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--clr-primary);
  animation: scrollBounce 2s ease-in-out infinite;
}

/* ══════════════════════════════════════════
   ABOUT
══════════════════════════════════════════ */
.about { background: var(--clr-bg2); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.about-visual {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.about-blob {
  position: absolute;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(99,102,241,.2) 0%, transparent 70%);
  border-radius: 50%;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  pointer-events: none;
  z-index: 0;
}
.about-card {
  position: relative;
  z-index: 1;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform .4s ease, box-shadow .4s ease;
}
.about-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card); }
.about-card:last-of-type { grid-column: 1 / -1; }
.card-float { animation: float 5s ease-in-out infinite; }
.delay-1 { animation-delay: .8s; }
.delay-2 { animation-delay: 1.6s; }
.card-icon { font-size: 2rem; margin-bottom: .75rem; }
.about-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: .4rem; }
.about-card p { font-size: .875rem; color: var(--clr-muted); }

.about-text { display: flex; flex-direction: column; gap: 1.1rem; }
.about-text p { color: var(--clr-muted); }
.about-checklist { list-style: none; display: flex; flex-direction: column; gap: .7rem; }
.about-checklist li { display: flex; align-items: flex-start; gap: .7rem; font-size: .95rem; }
.check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  min-width: 22px;
  background: rgba(99,102,241,.15);
  color: var(--clr-primary-h);
  border-radius: 50%;
  font-size: .75rem;
  font-weight: 700;
}

/* ══════════════════════════════════════════
   SERVICES
══════════════════════════════════════════ */
.services { background: var(--clr-bg); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.service-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s ease;
}
.service-card:hover { transform: translateY(-6px); border-color: rgba(99,102,241,.3); box-shadow: var(--shadow-card); }
.service-card:hover::before { transform: scaleX(1); }
.service-card-featured {
  background: linear-gradient(135deg, rgba(99,102,241,.12), rgba(6,182,212,.08));
  border-color: rgba(99,102,241,.3);
}
.service-icon { font-size: 2.2rem; margin-bottom: 1rem; }
.service-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: .6rem; }
.service-card p { font-size: .9rem; color: var(--clr-muted); margin-bottom: 1rem; }
.service-tag {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--clr-accent);
  background: rgba(6,182,212,.1);
  border: 1px solid rgba(6,182,212,.2);
  padding: .25rem .75rem;
  border-radius: 999px;
}

/* ══════════════════════════════════════════
   PORTFOLIO
══════════════════════════════════════════ */
.portfolio { background: var(--clr-bg2); }
.portfolio-filter {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.filter-btn {
  padding: .45rem 1.25rem;
  border-radius: 999px;
  border: 1px solid var(--clr-border);
  background: transparent;
  color: var(--clr-muted);
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: #fff;
}
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}
.portfolio-card { border-radius: var(--radius-lg); overflow: hidden; cursor: pointer; }
.portfolio-card.hidden { display: none; }
.portfolio-img {
  position: relative;
  height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  overflow: hidden;
}
.portfolio-icon-large {
  font-size: 5rem;
  opacity: .25;
  transition: var(--transition);
  user-select: none;
}
.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.7);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
  opacity: 0;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.portfolio-card:hover .portfolio-overlay { opacity: 1; }
.portfolio-card:hover .portfolio-icon-large { transform: scale(1.1) rotate(5deg); opacity: .15; }
.portfolio-badge {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  background: var(--clr-primary);
  color: #fff;
  padding: .2rem .7rem;
  border-radius: 999px;
  margin-bottom: .6rem;
  align-self: flex-start;
}
.portfolio-overlay h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: .4rem; color: #fff; }
.portfolio-overlay p { font-size: .85rem; color: rgba(255,255,255,.8); margin-bottom: .8rem; }
.portfolio-tags { display: flex; gap: .5rem; flex-wrap: wrap; }
.portfolio-tags span {
  font-size: .72rem;
  font-weight: 600;
  background: rgba(255,255,255,.15);
  color: #fff;
  padding: .2rem .6rem;
  border-radius: 999px;
}

/* ══════════════════════════════════════════
   TECHNOLOGIES
══════════════════════════════════════════ */
.technologies { background: var(--clr-bg); }
.tech-categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}
.tech-category {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: var(--transition);
}
.tech-category:hover { border-color: rgba(99,102,241,.3); box-shadow: 0 4px 20px rgba(0,0,0,.3); }
.tech-cat-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--clr-primary-h);
  margin-bottom: 1rem;
}
.tech-pills { display: flex; gap: .6rem; flex-wrap: wrap; }
.tech-pill {
  padding: .4rem 1rem;
  border-radius: 999px;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--clr-border);
  font-size: .83rem;
  font-weight: 500;
  color: var(--clr-text);
  transition: var(--transition);
  cursor: default;
}
.tech-pill:hover { background: rgba(99,102,241,.15); border-color: var(--clr-primary); color: var(--clr-primary-h); }

/* ══════════════════════════════════════════
   CTA STRIP
══════════════════════════════════════════ */
.cta-strip {
  background: linear-gradient(135deg, rgba(99,102,241,.15), rgba(6,182,212,.1));
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
  padding-block: 4rem;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.cta-text h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); font-weight: 800; margin-bottom: .4rem; }
.cta-text p { color: var(--clr-muted); }

/* ══════════════════════════════════════════
   CONTACT
══════════════════════════════════════════ */
.contact { background: var(--clr-bg2); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 4rem;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 1.25rem; }
.contact-info p { color: var(--clr-muted); }
.contact-details { list-style: none; display: flex; flex-direction: column; gap: 1rem; }
.contact-details li { display: flex; align-items: flex-start; gap: 1rem; }
.contact-icon {
  width: 44px; height: 44px; min-width: 44px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(99,102,241,.12);
  border: 1px solid rgba(99,102,241,.2);
  border-radius: 10px;
  font-size: 1.2rem;
}
.contact-details strong { display: block; font-weight: 600; font-size: .9rem; }
.contact-details a { color: var(--clr-muted); text-decoration: none; font-size: .9rem; transition: color .2s; }
.contact-details a:hover { color: var(--clr-primary-h); }
.social-links { display: flex; gap: .75rem; }
.social-link {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 10px;
  color: var(--clr-muted);
  text-decoration: none;
  font-weight: 700;
  font-size: .9rem;
  transition: var(--transition);
}
.social-link:hover { background: var(--clr-primary); border-color: var(--clr-primary); color: #fff; }

/* FORM */
.contact-form-wrap {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}
.contact-form { display: flex; flex-direction: column; gap: 1.2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: .4rem; }
.form-group label { font-size: .85rem; font-weight: 600; color: var(--clr-text); }
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--clr-bg);
  border: 1.5px solid var(--clr-border);
  border-radius: 10px;
  padding: .75rem 1rem;
  color: var(--clr-text);
  font-family: var(--font);
  font-size: .9rem;
  transition: border-color .2s, box-shadow .2s;
  outline: none;
  -webkit-appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.form-group input.error,
.form-group textarea.error { border-color: #ef4444; }
.form-error { font-size: .78rem; color: #f87171; min-height: 1rem; }
.form-note { font-size: .8rem; color: var(--clr-muted); text-align: center; }
.form-success {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  background: rgba(16,185,129,.1);
  border: 1px solid rgba(16,185,129,.3);
  border-radius: 10px;
  padding: 1rem 1.5rem;
}
.form-success span { font-size: 1.5rem; }
.form-success p { color: #34d399; font-weight: 600; }
::placeholder { color: var(--clr-muted); opacity: .7; }
option { background: var(--clr-surface); }

/* ══════════════════════════════════════════
   FOOTER
══════════════════════════════════════════ */
.footer { background: var(--clr-bg); border-top: 1px solid var(--clr-border); padding-top: 4rem; }
.footer-inner {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 3rem;
  padding-bottom: 3rem;
}
.footer-brand { display: flex; flex-direction: column; gap: 1rem; }
.footer-brand .logo { font-size: 1.2rem; }
.footer-brand p { font-size: .875rem; color: var(--clr-muted); }
.footer-links { display: flex; gap: 3rem; flex-wrap: wrap; }
.footer-col { display: flex; flex-direction: column; gap: .7rem; }
.footer-col h5 { font-size: .8rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--clr-text); margin-bottom: .3rem; }
.footer-col a { color: var(--clr-muted); text-decoration: none; font-size: .875rem; transition: color .2s; }
.footer-col a:hover { color: var(--clr-primary-h); }
.footer-bottom {
  border-top: 1px solid var(--clr-border);
  padding-block: 1.5rem;
  text-align: center;
}
.footer-bottom p { font-size: .83rem; color: var(--clr-muted); }

/* ══════════════════════════════════════════
   KEYFRAMES
══════════════════════════════════════════ */
@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}
@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: .8; }
  50%       { transform: translateY(10px); opacity: .3; }
}

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(8,12,20,.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    font-size: 1.1rem;
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-links a:not(.btn-nav) { font-size: 1.2rem; }
  .hamburger { display: flex; z-index: 1001; }

  .about-grid { grid-template-columns: 1fr; }
  .about-visual { order: 2; }
  .about-text { order: 1; }

  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }

  .cta-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-stats { gap: 1rem; }
  .stat-num { font-size: 1.6rem; }
  .footer-inner { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 1.5rem; }
  .services-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .tech-categories { grid-template-columns: 1fr; }
}