/* KnoxSphere Labs — brand tokens & glass UI */
:root {
  --bg-deep: #0b0f17;
  --bg-surface: #111827;
  --bg-elevated: #161e2e;
  --text: #f9fafb;
  --text-muted: #9ca3af;
  --indigo: #6366f1;
  --indigo-bright: #818cf8;
  --cyan: #06b6d4;
  --cyan-bright: #22d3ee;
  --border: rgba(148, 163, 184, 0.14);
  --glass: rgba(17, 24, 39, 0.72);
  --glass-strong: rgba(22, 30, 46, 0.85);
  --radius: 1rem;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --header-h: 4.25rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(99, 102, 241, 0.22), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(6, 182, 212, 0.14), transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(99, 102, 241, 0.08), transparent 60%),
    var(--bg-deep);
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: rgba(11, 15, 23, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
}

.brand-logo {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
  border-radius: 0.45rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.nav-links a.active {
  color: var(--text);
  background: rgba(99, 102, 241, 0.18);
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.35);
}

.nav-cta {
  margin-left: 0.35rem !important;
  background: linear-gradient(135deg, var(--indigo), #4f46e5) !important;
  color: white !important;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.3);
}

.nav-cta:hover {
  filter: brightness(1.08);
}

.menu-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  background: var(--glass);
  color: var(--text);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: transform 0.2s ease;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-toggle span::before {
  top: -6px;
}

.menu-toggle span::after {
  top: 6px;
}

.menu-toggle[aria-expanded="true"] span {
  background: transparent;
}

.menu-toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.8rem 1.25rem;
  border-radius: 0.75rem;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--indigo), #4f46e5);
  color: white;
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 16px 36px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border);
  color: var(--text);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  border-color: rgba(6, 182, 212, 0.45);
  background: rgba(6, 182, 212, 0.08);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(99, 102, 241, 0.35);
  color: var(--indigo-bright);
}

.btn-ghost:hover {
  background: rgba(99, 102, 241, 0.12);
}

.btn-sm {
  padding: 0.55rem 0.95rem;
  font-size: 0.85rem;
}

/* Glass cards */
.glass {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.glass:hover {
  border-color: rgba(99, 102, 241, 0.28);
}

/* Sections */
.section {
  padding: 4.5rem 0;
}

.section-sm {
  padding: 3rem 0;
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2.25rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan-bright);
  margin-bottom: 0.85rem;
}

.eyebrow::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 0 12px var(--cyan);
}

h1,
h2,
h3 {
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 0.85rem;
}

h1 {
  font-size: clamp(2.1rem, 4.5vw, 3.35rem);
  font-weight: 750;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  font-weight: 700;
}

h3 {
  font-size: 1.15rem;
  font-weight: 650;
}

.lead,
.muted {
  color: var(--text-muted);
}

.lead {
  font-size: 1.08rem;
  max-width: 42rem;
}

.gradient-text {
  background: linear-gradient(120deg, #fff 10%, var(--indigo-bright) 55%, var(--cyan-bright));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Hero */
.hero {
  padding: 4rem 0 2rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: stretch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.hero-callout {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
}

.hero-callout::after {
  content: "";
  position: absolute;
  inset: auto -20% -40% auto;
  width: 14rem;
  height: 14rem;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.2), transparent 70%);
  pointer-events: none;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.feature-list li {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  font-size: 0.92rem;
  color: #d1d5db;
}

.feature-list li::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  margin-top: 0.45rem;
  border-radius: 999px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--indigo), var(--cyan));
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.45);
}

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.card {
  padding: 1.4rem;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 22px 55px rgba(0, 0, 0, 0.4);
}

.card-icon {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 0.75rem;
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.2), rgba(6, 182, 212, 0.12));
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: var(--indigo-bright);
}

.card-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Badges & tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.badge-live {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-active {
  background: rgba(6, 182, 212, 0.12);
  color: var(--cyan-bright);
  border: 1px solid rgba(6, 182, 212, 0.28);
}

.badge-dev {
  background: rgba(99, 102, 241, 0.15);
  color: var(--indigo-bright);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.badge-dot {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1rem 0;
}

.tag {
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  font-size: 0.75rem;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
}

.product-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.product-card .card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.product-card .card-body {
  flex: 1;
}

.product-card .card-actions {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.product-card ul {
  margin: 0.85rem 0 0;
  padding-left: 1.1rem;
  color: #d1d5db;
  font-size: 0.9rem;
}

.product-card li + li {
  margin-top: 0.35rem;
}

/* Tech grid */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.tech-item {
  padding: 1.1rem 1rem;
  text-align: center;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.tech-item:hover {
  transform: translateY(-2px);
  border-color: rgba(6, 182, 212, 0.35);
}

.tech-item strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.tech-item span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* About */
.philosophy {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.mission-panel {
  padding: 2rem;
}

/* Contact form */
.form-shell {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.75rem;
}

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

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-field.full {
  grid-column: 1 / -1;
}

.form-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #e5e7eb;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: 0.7rem;
  border: 1px solid var(--border);
  background: rgba(11, 15, 23, 0.65);
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: rgba(99, 102, 241, 0.55);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

.form-field .error {
  font-size: 0.78rem;
  color: #f87171;
  min-height: 1rem;
}

.form-field.invalid input,
.form-field.invalid select,
.form-field.invalid textarea {
  border-color: rgba(248, 113, 113, 0.55);
}

.form-success {
  display: none;
  text-align: center;
  padding: 2rem 1rem;
}

.form-success.visible {
  display: block;
}

.form-success .check {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
  font-size: 1.5rem;
}

.form-actions {
  margin-top: 0.5rem;
  display: flex;
  justify-content: flex-end;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 2rem;
  margin-top: 2rem;
  background: rgba(11, 15, 23, 0.65);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--cyan-bright);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
}

/* Page hero band */
.page-hero {
  padding: 3.25rem 0 1rem;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .grid-3,
  .grid-2,
  .tech-grid,
  .philosophy {
    grid-template-columns: 1fr;
  }

  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: calc(var(--header-h) + 0.5rem);
    right: 1rem;
    left: 1rem;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem;
    border-radius: 1rem;
    background: var(--glass-strong);
    border: 1px solid var(--border);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem 0.9rem;
  }

  .nav-cta {
    margin-left: 0 !important;
    text-align: center;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .form-grid,
  .tech-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 2.5rem;
  }

  .section {
    padding: 3.25rem 0;
  }
}