/* ============================================================
   SpectronRX Collaboration — Shared Stylesheet
   Color palette: Deep Navy, White, SpectronRX Blue accent
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');

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

:root {
  --navy:       #0a0f1e;
  --navy-mid:   #111827;
  --navy-light: #1a2540;
  --navy-card:  #141d33;
  --accent:     #2EA3F2;
  --accent-dim: #1b8ad4;
  --accent-glow: rgba(46,163,242,0.15);
  --accent-bright: #52b5f7;
  --white:      #ffffff;
  --off-white:  #f0f4ff;
  --muted:      #8898b8;
  --border:     rgba(255,255,255,0.08);
  --radius:     12px;
  --radius-lg:  20px;
  --shadow:     0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:  0 12px 48px rgba(0,0,0,0.55);
  --transition: 0.22s ease;
  --font-body:  'Inter', system-ui, sans-serif;
  --font-head:  'Space Grotesk', 'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--navy);
  color: var(--white);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main { flex: 1; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: #fff; }

img { display: block; max-width: 100%; }

/* ── Layout Utilities ─────────────────────────────────────── */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow { max-width: 720px; margin: 0 auto; padding: 0 24px; }

.section { padding: 80px 0; }
.section--sm { padding: 48px 0; }

/* ── Navigation ───────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,15,30,0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

.nav__logo-mark {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--accent), #1b6fb5);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--white);
  flex-shrink: 0;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav__links a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 8px;
  transition: all var(--transition);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--white);
  background: var(--navy-light);
}

.nav__links .btn-nav {
  color: var(--white);
  background: var(--accent);
  font-weight: 600;
  padding: 6px 18px;
}

.nav__links .btn-nav:hover {
  background: var(--accent-bright);
  color: var(--white);
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: var(--white);
}
.btn--primary:hover {
  background: var(--accent-bright);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(46,163,242,0.35);
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn--outline:hover {
  background: var(--accent-glow);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn--ghost {
  background: var(--navy-light);
  color: var(--muted);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  background: var(--navy-card);
  color: var(--white);
}

.btn--lg { padding: 15px 36px; font-size: 1rem; }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 100px;
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 50% -10%, rgba(46,163,242,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 80%, rgba(46,163,242,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(46,163,242,0.1);
  border: 1px solid rgba(46,163,242,0.25);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.hero__eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.hero__title {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--white);
}

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

.hero__sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: rgba(46,163,242,0.3);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(46,163,242,0.1);
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(46,163,242,0.04) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.card:hover::before { opacity: 1; }

.card__icon {
  width: 48px;
  height: 48px;
  background: var(--accent-glow);
  border: 1px solid rgba(46,163,242,0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.card__tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 12px;
}

.card__title {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
  line-height: 1.3;
}

.card__desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.card__link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}

.card:hover .card__link { gap: 10px; }

/* ── Project Grid ─────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

/* ── Section Headings ─────────────────────────────────────── */
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--white);
  margin-bottom: 16px;
}

.section-sub {
  font-size: 1rem;
  color: var(--muted);
  max-width: 520px;
  line-height: 1.7;
}

/* ── Divider ──────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
  margin: 0;
}

/* ── Form Elements ────────────────────────────────────────── */
.form-group { margin-bottom: 20px; }

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 8px;
}

.form-input,
.form-textarea,
select.form-input {
  width: 100%;
  background: var(--navy-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 12px 16px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--muted); opacity: 0.7; }

.form-input:focus,
.form-textarea:focus,
select.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

select.form-input {
  appearance: auto;
}

/* ── Stats Strip ──────────────────────────────────────────── */
.stats-strip {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.stat__num {
  font-family: var(--font-head);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat__label {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Feature List ─────────────────────────────────────────── */
.feature-list { list-style: none; }

.feature-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--muted);
}

.feature-list li:last-child { border-bottom: none; }

.feature-list .check {
  width: 20px;
  height: 20px;
  background: var(--accent-glow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.7rem;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ── Page Hero (inner pages) ──────────────────────────────── */
.page-hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 0%, rgba(46,163,242,0.08) 0%, transparent 70%);
  pointer-events: none;
}

/* ── Breadcrumb ───────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 24px;
}

.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--border); font-size: 1rem; }

/* ── Badge ────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.badge--teal {
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid rgba(46,163,242,0.25);
}

.badge--blue {
  background: rgba(139,92,246,0.12);
  color: #a78bfa;
  border: 1px solid rgba(139,92,246,0.25);
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__left {
  font-size: 0.82rem;
  color: var(--muted);
}

.footer__right {
  font-size: 0.82rem;
  color: var(--muted);
}

.footer__right a {
  color: var(--accent);
  font-weight: 500;
}

.footer__right a:hover { color: var(--white); }

/* ── Auth Card (login) ────────────────────────────────────── */
.auth-wrap {
  min-height: calc(100vh - 64px - 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
}

.auth-card {
  background: var(--navy-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow);
}

.auth-card__icon {
  width: 52px;
  height: 52px;
  background: var(--accent-glow);
  border: 1px solid rgba(46,163,242,0.2);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 24px;
}

.auth-card__title {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.auth-card__sub {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 28px;
}

.auth-card__note {
  font-size: 0.78rem;
  color: var(--muted);
  text-align: center;
  margin-top: 16px;
  line-height: 1.5;
}

/* ── Project Detail ───────────────────────────────────────── */
.detail-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 20px 0 40px;
}

.detail-body {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

@media (max-width: 860px) {
  .detail-body { grid-template-columns: 1fr; }
}

.detail-content h2 {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  margin: 32px 0 12px;
}

.detail-content h2:first-child { margin-top: 0; }

.detail-content p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.detail-sidebar .card { position: sticky; top: 84px; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero { padding: 80px 0 64px; }
  .section { padding: 56px 0; }
  .stats-strip { gap: 28px; }
  .auth-card { padding: 28px 20px; }
}

@media (max-width: 480px) {
  .projects-grid { grid-template-columns: 1fr; }
}

/* ── Subtle grid texture ──────────────────────────────────── */
.grid-bg {
  position: relative;
}
.grid-bg::after {
  content: '';
  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: 48px 48px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}