/* Kinexic.io — System Layer landing
   Dark cockpit aesthetic · violet accent · restrained motion */

:root {
  --bg: #0A0A0F;
  --bg-elevated: #12121A;
  --bg-panel: #16161F;
  --border: rgba(124, 92, 255, 0.18);
  --border-soft: rgba(232, 230, 240, 0.08);
  --text: #E8E6F0;
  --text-muted: #9B97AD;
  --text-dim: #6E6A80;
  --accent: #7C5CFF;
  --accent-soft: rgba(124, 92, 255, 0.15);
  --accent-glow: rgba(124, 92, 255, 0.35);
  --cyan: #5CE1E6;
  --cyan-soft: rgba(92, 225, 230, 0.12);
  --success: #5CE1E6;
  --danger: #FF6B8A;
  --radius: 12px;
  --radius-sm: 8px;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Orbitron", "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --max: 1100px;
  --header-h: 64px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: #8ff0f4;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1000;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

/* Background grid */
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124, 92, 255, 0.18), transparent 55%),
    radial-gradient(ellipse 40% 30% at 90% 40%, rgba(92, 225, 230, 0.06), transparent 50%),
    linear-gradient(rgba(124, 92, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 92, 255, 0.03) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  mask-image: linear-gradient(to bottom, black 0%, black 70%, transparent 100%);
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.section {
  padding: 5rem 0;
}

.section-head {
  max-width: 36rem;
  margin-bottom: 2.5rem;
}

.section-head h2 {
  margin: 0.4rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.25;
}

.section-lede {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.sys-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid var(--border-soft);
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.wordmark {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  color: var(--text);
  text-decoration: none;
  line-height: 1.1;
}

.wordmark:hover {
  color: var(--text);
}

.wordmark-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.18em;
}

.wordmark-sys {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 0.4rem 0.9rem !important;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent) !important;
  background: var(--accent-soft);
}

.nav-cta:hover {
  border-color: var(--accent);
  color: #fff !important;
  background: rgba(124, 92, 255, 0.28);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin-inline: auto;
  background: var(--text);
  transition: transform 0.25s var(--ease), opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Hero */
.hero {
  padding-top: 4.5rem;
  padding-bottom: 5.5rem;
}

.hero-inner {
  max-width: 42rem;
}

.hero-title {
  margin: 1rem 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.35rem);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.15;
}

.hero-title .accent {
  color: var(--accent);
  text-shadow: 0 0 40px var(--accent-glow);
}

.hero-sub {
  margin: 0 0 2rem;
  max-width: 34rem;
  color: var(--text-muted);
  font-size: clamp(1rem, 2.2vw, 1.125rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin-bottom: 2.5rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background: rgba(18, 18, 26, 0.6);
}

.meta-chip code {
  font-family: inherit;
  color: var(--cyan);
}

.meta-chip.muted {
  color: var(--text-dim);
  border-style: dashed;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s, box-shadow 0.25s, color 0.2s, transform 0.15s;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #7C5CFF, #6344e8);
  box-shadow: 0 0 0 0 transparent, 0 0 24px rgba(124, 92, 255, 0.25);
}

.btn-primary:hover {
  color: #fff;
  box-shadow: 0 0 32px rgba(124, 92, 255, 0.45);
  transform: translateY(-1px);
}

.btn-ghost {
  color: var(--text);
  background: transparent;
  border-color: var(--border-soft);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--border);
  background: var(--accent-soft);
}

.btn-block {
  width: 100%;
}

/* System panels */
.system-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .system-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.panel {
  padding: 1.75rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--bg-panel);
}

.panel-glow {
  border-color: var(--border);
  box-shadow: 0 0 40px rgba(124, 92, 255, 0.08), inset 0 1px 0 rgba(124, 92, 255, 0.12);
}

.panel-dim {
  opacity: 0.92;
  border-style: dashed;
}

.panel h3 {
  margin: 0.5rem 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.panel > p {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.panel-tag {
  display: inline-block;
  margin: 0 !important;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--cyan-soft);
}

.panel-tag.coming {
  color: var(--text-dim);
  background: rgba(110, 106, 128, 0.15);
}

.panel-list {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.panel-list li {
  position: relative;
  padding: 0.35rem 0 0.35rem 1.1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-soft);
}

.panel-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.sig-block {
  margin-top: 2rem;
  padding: 1.5rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.sig-code {
  margin: 0.75rem 0;
  padding: 1rem 1.15rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #0D0D14;
  font-family: var(--font-mono);
  font-size: clamp(0.75rem, 2vw, 0.9rem);
  color: var(--cyan);
  line-height: 1.5;
}

.sig-code code {
  font-family: inherit;
}

.sig-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* Layers */
.layers-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .layers-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .layers-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.layer-card {
  position: relative;
  padding: 1.5rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--bg-panel);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), transform 0.2s;
}

.layer-card:hover {
  border-color: var(--border);
  box-shadow: 0 0 28px rgba(124, 92, 255, 0.1);
  transform: translateY(-2px);
}

.layer-core {
  border-color: rgba(92, 225, 230, 0.25);
  background: linear-gradient(160deg, var(--bg-panel), rgba(92, 225, 230, 0.04));
}

.layer-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.layer-card h3 {
  margin: 0.5rem 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.layer-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Values */
.values-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--border-soft);
}

.values-list li {
  display: grid;
  gap: 0.35rem 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-soft);
}

@media (min-width: 640px) {
  .values-list li {
    grid-template-columns: 10rem 1fr;
    align-items: baseline;
  }
}

.value-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.value-mean {
  color: var(--text-muted);
  font-size: 0.98rem;
}

/* Access form */
.access-inner {
  max-width: 32rem;
}

.access-panel {
  padding: 1.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  box-shadow: 0 0 48px rgba(124, 92, 255, 0.1);
}

.access-form .field {
  margin-bottom: 1.15rem;
}

.access-form label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}

.optional {
  font-weight: 400;
  color: var(--text-dim);
}

.access-form input,
.access-form textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.access-form input::placeholder,
.access-form textarea::placeholder {
  color: var(--text-dim);
}

.access-form input:hover,
.access-form textarea:hover {
  border-color: var(--border);
}

.access-form input:focus,
.access-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  outline: none;
}

.access-form .field-error {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--danger);
}

.access-form .field.invalid input,
.access-form .field.invalid textarea {
  border-color: var(--danger);
}

.form-hint {
  margin: 1rem 0 0;
  font-size: 0.85rem;
  color: var(--text-dim);
  text-align: center;
}

.hint-muted {
  color: var(--text-dim);
}

.access-success {
  text-align: center;
}

.access-success h3 {
  margin: 0.5rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.access-success p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.success-ref {
  margin: 1.25rem 0 !important;
  font-family: var(--font-mono);
  font-size: 0.8rem !important;
}

.success-ref code {
  color: var(--cyan);
}

/* Footer */
.site-footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--border-soft);
}

.footer-inner {
  text-align: center;
}

.footer-inner p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-sub {
  margin-top: 0.4rem !important;
  font-family: var(--font-mono);
  font-size: 0.7rem !important;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* Motion */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    animation: fadeUp 0.7s var(--ease) both;
  }
  .delay-1 { animation-delay: 0.08s; }
  .delay-2 { animation-delay: 0.16s; }
  .delay-3 { animation-delay: 0.24s; }
  .delay-4 { animation-delay: 0.32s; }

  .panel-glow {
    animation: glowPulse 5s ease-in-out infinite;
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 40px rgba(124, 92, 255, 0.08), inset 0 1px 0 rgba(124, 92, 255, 0.12);
  }
  50% {
    box-shadow: 0 0 56px rgba(124, 92, 255, 0.16), inset 0 1px 0 rgba(124, 92, 255, 0.18);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-in { animation: none; }
}

/* Mobile nav */
@media (max-width: 719px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 1rem 1.25rem;
    border-bottom: 1px solid var(--border-soft);
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(14px);
  }

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

  .nav-links li {
    border-top: 1px solid var(--border-soft);
  }

  .nav-links a {
    display: block;
    padding: 0.85rem 0.25rem;
  }

  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
  }
}