/* ============================================================
   QUANTUM SOFTWARE GROUP — Main Stylesheet
   ============================================================ */

/* ── Custom Properties ──────────────────────────────────────── */
:root {
  --bg-primary:   #080D1A;
  --bg-secondary: #0D1528;
  --bg-card:      rgba(255, 255, 255, 0.04);
  --accent:       #00D4D4;
  --accent-hover: #00B8B8;
  --accent-glow:  rgba(0, 212, 212, 0.12);
  --accent-border:rgba(0, 212, 212, 0.25);
  --purple:       #6C4CF1;
  --text-primary: #EEF2FF;
  --text-secondary: #7B8EA8;
  --border:       rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.14);
  --radius:       12px;
  --radius-lg:    20px;
  --shadow-card:  0 8px 32px rgba(0, 0, 0, 0.4);
  --nav-height:   68px;
  --transition:   0.25s ease;
  --font:         'Inter', system-ui, -apple-system, sans-serif;
  --max-w:        1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font-family: inherit; }

/* ── Typography ─────────────────────────────────────────────── */
h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); font-weight: 800; line-height: 1.08; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.8rem, 4vw, 2.75rem); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; }
h3 { font-size: clamp(1.05rem, 2vw, 1.25rem); font-weight: 600; }
p  { color: var(--text-secondary); font-size: 1rem; line-height: 1.8; }

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(8, 13, 26, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow var(--transition), background var(--transition);
}

.nav.scrolled {
  background: rgba(8, 13, 26, 0.95);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.04em;
}

.logo-accent { color: var(--accent); }

/* Desktop nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  list-style: none;
}

.nav-links a {
  display: inline-block;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.45rem 0.875rem;
  border-radius: 7px;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav-links a:hover { color: var(--text-primary); background: rgba(255, 255, 255, 0.05); }
.nav-links a.active { color: var(--accent); }

.nav-links .nav-cta {
  background: var(--accent);
  color: #080D1A;
  font-weight: 700;
  padding: 0.5rem 1.1rem;
  margin-left: 0.5rem;
  border-radius: 8px;
}

.nav-links .nav-cta:hover { background: var(--accent-hover); color: #080D1A; }
.nav-links .nav-cta.active { color: #080D1A; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

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

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: rgba(8, 13, 26, 0.98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 1.5rem 1.5rem;
  z-index: 999;
}

.mobile-menu.open { display: block; }

.mobile-menu ul { list-style: none; display: flex; flex-direction: column; gap: 0.25rem; }

.mobile-menu a {
  display: block;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  transition: all var(--transition);
}

.mobile-menu a:hover { color: var(--text-primary); background: rgba(255, 255, 255, 0.05); }
.mobile-menu a.active { color: var(--accent); background: var(--accent-glow); }

/* ── Section Shared Styles ──────────────────────────────────── */
section { padding: 5.5rem 1.5rem; }

.section-container { max-width: var(--max-w); margin: 0 auto; }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  margin-bottom: 1rem;
}

.section-title  { margin-bottom: 1rem; color: var(--text-primary); }
.section-subtitle { font-size: 1.1rem; max-width: 580px; margin-bottom: 3.5rem; }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.65rem;
  border-radius: 10px;
  font-size: 0.975rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

.btn-primary {
  background: var(--accent);
  color: #080D1A;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 212, 212, 0.28);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-group { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ── Hero ───────────────────────────────────────────────────── */
#home {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  min-height: 100svh;
  padding-top: var(--nav-height);
  padding-bottom: 3rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 60% at 50% -5%,  rgba(0, 212, 212, 0.09)  0%, transparent 65%),
    radial-gradient(ellipse 55% 45% at 85% 65%,  rgba(108, 76, 241, 0.07) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 10% 80%,  rgba(0, 212, 212, 0.04)  0%, transparent 60%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 0%, transparent 80%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  padding: 0.375rem 0.875rem;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.7); }
}

.hero-title { margin-bottom: 1.5rem; }

.hero-title .highlight {
  color: var(--accent);
  position: relative;
  display: inline-block;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.175rem);
  max-width: 560px;
  margin-bottom: 2.5rem;
}

/* Stats */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  margin-top: 3.5rem;
  padding-top: 2.75rem;
  border-top: 1px solid var(--border);
}

.hero-stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.hero-stat-value span { color: var(--accent); }
.hero-stat-label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 0.3rem; }

/* ── Services ───────────────────────────────────────────────── */
#services { background: var(--bg-secondary); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.service-card:hover {
  border-color: var(--accent-border);
  background: rgba(0, 212, 212, 0.04);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(0, 212, 212, 0.08);
}

.service-icon {
  width: 46px; height: 46px;
  background: var(--accent-glow);
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.service-icon svg { width: 22px; height: 22px; }
.service-card h3  { margin-bottom: 0.6rem; color: var(--text-primary); }

/* ── About ──────────────────────────────────────────────────── */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  margin-bottom: 5rem;
}

.about-text-block p { margin-bottom: 1.1rem; }
.about-text-block p:last-child { margin-bottom: 0; }

.about-values {
  display: flex;
  flex-direction: column;
  gap: 1.375rem;
}

.value-item {
  display: flex;
  gap: 0.875rem;
  align-items: flex-start;
}

.value-icon {
  width: 32px; height: 32px; min-width: 32px;
  background: var(--accent-glow);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-top: 2px;
}

.value-icon svg { width: 15px; height: 15px; }

.value-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.value-item p { font-size: 0.875rem; }

/* Team */
.team-section {
  padding-top: 4rem;
  margin-top: 4rem;
  border-top: 1px solid var(--border);
}

.team-section-title {
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.team-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.team-avatar {
  width: 76px; height: 76px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, #4A7CF8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: #080D1A;
  margin: 0 auto 1.25rem;
  border: 3px solid rgba(0, 212, 212, 0.25);
  box-shadow: 0 4px 20px rgba(0, 212, 212, 0.15);
}

.team-card h3 { color: var(--text-primary); margin-bottom: 0.3rem; }

.team-role {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.875rem;
}

.team-bio { font-size: 0.9rem; margin-bottom: 1.5rem; }

.team-linkedin {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.875rem;
  border: 1px solid var(--accent-border);
  border-radius: 7px;
  transition: all var(--transition);
}

.team-linkedin:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
}

.team-linkedin svg { width: 14px; height: 14px; }

/* ── Careers ────────────────────────────────────────────────── */
#careers { background: var(--bg-secondary); }

.careers-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.careers-text p { margin-bottom: 1rem; }
.careers-text p:last-of-type { margin-bottom: 2rem; }

.perks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.875rem;
}

.perk-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.perk-card:hover { border-color: var(--border-hover); }

.perk-icon { font-size: 1.4rem; margin-bottom: 0.6rem; line-height: 1; }
.perk-card h4 { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); margin-bottom: 0.2rem; }
.perk-card p  { font-size: 0.8rem; }

/* ── Contact ────────────────────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 4rem;
  align-items: start;
}

.contact-info { display: flex; flex-direction: column; gap: 2rem; }

.contact-item { display: flex; gap: 1rem; align-items: flex-start; }

.contact-item-icon {
  width: 44px; height: 44px; min-width: 44px;
  background: var(--accent-glow);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.contact-item-icon svg { width: 20px; height: 20px; }

.contact-item h4 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.contact-item a, .contact-item p {
  color: var(--text-primary);
  font-size: 0.95rem;
  text-decoration: none;
}

.contact-item a:hover { color: var(--accent); }

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group { margin-bottom: 1.125rem; }

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group label span { color: var(--accent); font-size: 0.75rem; }

.form-group input,
.form-group textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 0.7rem 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.5;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 212, 0.1);
}

.form-group textarea { resize: vertical; min-height: 130px; }

.captcha-wrapper { margin-bottom: 1.125rem; }

.form-msg {
  font-size: 0.85rem;
  margin-top: 0.75rem;
  display: none;
  border-radius: 7px;
  padding: 0.6rem 0.875rem;
}

.form-msg.error {
  color: #FF6B6B;
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.2);
}

.form-msg.success {
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  text-align: center;
}

.captcha-error {
  font-size: 0.82rem;
  color: #FF6B6B;
  margin-top: 0.4rem;
  display: none;
}

/* ── Footer ─────────────────────────────────────────────────── */
footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: 3.5rem 1.5rem 2rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.footer-brand p {
  font-size: 0.875rem;
  margin-top: 1rem;
  max-width: 260px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }

.footer-col a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-bottom p { font-size: 0.82rem; }

/* ── Scroll Animations ──────────────────────────────────────── */
.anim-up {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.anim-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Media Queries ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .about-intro       { grid-template-columns: 1fr; gap: 2.5rem; }
  .team-grid         { grid-template-columns: repeat(3, 1fr); }
  .careers-content   { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-grid       { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .contact-layout    { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
  .nav-links         { display: none; }
  .hamburger         { display: flex; }
  section            { padding: 4rem 1.25rem; }
  .team-grid         { grid-template-columns: 1fr; }
  .form-row          { grid-template-columns: 1fr; }
  .footer-grid       { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom     { flex-direction: column; text-align: center; }
  .perks-grid        { grid-template-columns: 1fr 1fr; }
  .hero-stats        { gap: 1.75rem; }
}

@media (max-width: 480px) {
  .btn-group         { flex-direction: column; }
  .btn               { justify-content: center; }
  .perks-grid        { grid-template-columns: 1fr; }
  .hero-stats        { gap: 1.5rem; }
  .hero-stat-value   { font-size: 1.75rem; }
}

/* ═══════════════════════════════════════════
   ACCESSIBILITY & FORM SUPPORT
═══════════════════════════════════════════ */

/* Skip link — visible only when focused via keyboard */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: 0.75rem 1.25rem;
  background: var(--accent, #00D4D4);
  color: #080D1A;
  font-weight: 600;
  border-radius: 0 0 8px 0;
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
}

/* Honeypot — hidden from humans, still reachable by naive bots.
   Deliberately not `display:none`, which some bots detect and skip. */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Submit button loading state */
.btn.is-loading {
  opacity: 0.7;
  cursor: progress;
  pointer-events: none;
}

.btn.is-loading svg {
  display: none;
}

.btn.is-loading::after {
  content: "";
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .btn.is-loading::after { animation: none; }
}