/* ═══════════════════════════════════════
   Corvus QOS — style.css
   ═══════════════════════════════════════ */

/* ─── Global ─── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
}

p, .body-text {
  font-family: var(--font-body);
}

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

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

.section-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-4);
}

.section-subhead {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 640px;
  line-height: 1.6;
  margin-bottom: var(--space-10);
}

.section-divider {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
}

/* ─── Buttons ─── */
.btn {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-interactive);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #000;
  border: 1px solid var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}
.btn-primary:active {
  transform: scale(0.97);
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
}
.btn-ghost:hover {
  border-color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.05);
}
.btn-ghost:active {
  transform: scale(0.97);
}

/* ═══════════════════════════════════════
   SECTION 1: NAVIGATION
   ═══════════════════════════════════════ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  transition: background 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

.site-nav.scrolled {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--color-border-subtle);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .nav-inner { padding-inline: var(--space-8); }
}

.nav-logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo .qos {
  color: var(--color-primary);
}

.nav-links {
  display: none;
  list-style: none;
  gap: var(--space-6);
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: color var(--transition-interactive);
}
.nav-links a:hover {
  color: var(--color-primary);
}

.nav-actions {
  display: none;
  gap: var(--space-3);
}

@media (min-width: 1024px) {
  .nav-actions {
    display: flex;
  }
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
  z-index: 110;
}

@media (min-width: 1024px) {
  .hamburger { display: none; }
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  transition: all 0.3s ease;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 105;
  background: rgba(0, 0, 0, 0.97);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.mobile-menu.active {
  opacity: 1;
  pointer-events: all;
}
.mobile-menu a {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: color var(--transition-interactive);
}
.mobile-menu a:hover { color: var(--color-primary); }
.mobile-menu .btn {
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-8);
}

/* ═══════════════════════════════════════
   SECTION 2: HERO
   ═══════════════════════════════════════ */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  padding-bottom: var(--space-12);
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse 80% 60% at 70% 50%, rgba(202,255,4,0.03) 0%, transparent 70%);
}

@media (max-width: 767px) {
  .hero {
    min-height: auto;
    padding-top: 100px;
    padding-bottom: var(--space-10);
  }
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1.5fr 1fr;
  }
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 1rem + 5vw, 5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.08;
  margin-bottom: var(--space-6);
}

@media (min-width: 1024px) {
  .hero-headline {
    font-size: var(--text-hero);
  }
}

.hero-cycle {
  color: var(--color-primary);
  display: inline;
}
.hero-cursor {
  display: inline-block;
  width: 3px;
  height: 0.85em;
  background: var(--color-primary);
  margin-left: 2px;
  vertical-align: baseline;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-subhead {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--color-text-muted);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.hero-ctas {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

@media (max-width: 480px) {
  .hero-ctas {
    flex-direction: column;
    align-items: flex-start;
  }
}

.hero-tagline {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Hero Visual — Network Topology SVG */
.hero-visual {
  display: none;
  justify-content: center;
  align-items: center;
  position: relative;
}

@media (min-width: 1024px) {
  .hero-visual {
    display: flex;
    min-height: 400px;
  }
}

.network-svg {
  width: 100%;
  max-width: 500px;
  height: auto;
  filter: drop-shadow(0 0 60px rgba(202, 255, 4, 0.06));
}

.network-svg .node-white {
  fill: rgba(255,255,255,0.3);
}
.network-svg .node-lime {
  fill: var(--color-primary);
}
.network-svg .line-conn {
  stroke: rgba(255,255,255,0.08);
  stroke-width: 1;
}
.network-svg .line-accent {
  stroke: rgba(202,255,4,0.15);
  stroke-width: 1;
}

/* Pulsing animation for nodes */
@keyframes pulse-node {
  0%, 100% { r: 3; opacity: 0.6; }
  50% { r: 5; opacity: 1; }
}
@keyframes pulse-lime {
  0%, 100% { r: 4; opacity: 0.7; }
  50% { r: 7; opacity: 1; }
}
.network-svg .pulse {
  animation: pulse-node 3s ease-in-out infinite;
}
.network-svg .pulse-lime {
  animation: pulse-lime 4s ease-in-out infinite;
}

/* Slow rotation of the entire SVG */
@keyframes slow-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.network-svg .rotate-group {
  transform-origin: center;
  animation: slow-rotate 120s linear infinite;
}

/* ═══════════════════════════════════════
   SECTION 3: METRICS BAR
   ═══════════════════════════════════════ */
.metrics-bar {
  background: var(--color-surface);
  border-top: 1px solid var(--color-primary);
  border-bottom: 1px solid var(--color-primary);
  padding: var(--space-6) var(--space-4);
}

.metrics-inner {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  max-width: var(--content-wide);
  margin-inline: auto;
  text-align: center;
}

@media (min-width: 768px) {
  .metrics-inner {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-12);
    padding-inline: var(--space-8);
  }
}

.metric-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
.metric-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ═══════════════════════════════════════
   SECTION 4: CORE SERVICES
   ═══════════════════════════════════════ */
.services {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
}

.service-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .service-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-interactive);
}
.service-card:hover {
  border-color: rgba(255,255,255,0.12);
}

.service-card-number {
  font-family: var(--font-display);
  font-size: clamp(3rem, 5vw, 5rem);
  font-weight: 700;
  color: var(--color-border);
  position: absolute;
  top: var(--space-3);
  right: var(--space-6);
  line-height: 1;
  user-select: none;
}

.service-card-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-2);
}

.service-card-subtitle {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.service-card-desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.service-card-features {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-6);
}
.service-card-features li {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.service-card-features li::before {
  content: "•";
  color: var(--color-primary);
  font-size: 1.2em;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════
   SECTION 5: HARDWARE PORTFOLIO
   ═══════════════════════════════════════ */
.hardware {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
}

.hardware-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .hardware-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.hardware-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-interactive);
}
.hardware-card:hover {
  border-color: rgba(255,255,255,0.12);
}

.hardware-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-6);
}

.hardware-specs {
  list-style: none;
  padding: 0;
  flex-grow: 1;
  margin-bottom: var(--space-6);
}
.hardware-specs li {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-subtle);
}
.hardware-specs li:last-child {
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 500;
}

/* ═══════════════════════════════════════
   SECTION 6: TARGET SUBNETS
   ═══════════════════════════════════════ */
.subnets {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
}

.subnet-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .subnet-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .subnet-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.subnet-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition-interactive);
}
.subnet-card:hover {
  border-color: rgba(255,255,255,0.12);
}

.subnet-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.subnet-badge {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  background: var(--color-primary);
  color: #000;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.subnet-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: #fff;
}

.subnet-desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  line-height: 1.5;
}

.subnet-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.subnet-emission {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
}

.tag-pill {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

/* ═══════════════════════════════════════
   SECTION 7: NVIDIA PLATFORM
   ═══════════════════════════════════════ */
.nvidia-stack {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  text-align: center;
}

.nvidia-stack .section-heading,
.nvidia-stack .section-subhead {
  margin-inline: auto;
}

.platform-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.platform-badge {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: #fff;
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
}

.nvidia-note {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

/* ═══════════════════════════════════════
   SECTION 8: ABOUT
   ═══════════════════════════════════════ */
.about {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  text-align: center;
}

.about .section-heading {
  margin-inline: auto;
}

.about-body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 720px;
  margin-inline: auto;
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.about-email {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
}
.about-email:hover {
  text-decoration: underline;
}

/* ═══════════════════════════════════════
   SECTION 9: FINAL CTA
   ═══════════════════════════════════════ */
.final-cta {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  text-align: center;
  background: radial-gradient(ellipse 60% 50% at 50% 60%, rgba(202,255,4,0.04) 0%, transparent 70%);
}

.final-cta-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-8);
  max-width: 720px;
  margin-inline: auto;
}

.final-cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ═══════════════════════════════════════
   SECTION 10: FOOTER
   ═══════════════════════════════════════ */
.site-footer {
  padding: var(--space-16) 0 var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-4);
}

.footer-col-links {
  list-style: none;
  padding: 0;
}
.footer-col-links li {
  margin-bottom: var(--space-2);
}
.footer-col-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
.footer-col-links a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-bottom a {
  color: var(--color-text-faint);
  transition: color var(--transition-interactive);
}
.footer-bottom a:hover {
  color: var(--color-text-muted);
}

/* ═══════════════════════════════════════
   SCROLL REVEAL
   ═══════════════════════════════════════ */
.reveal {
  opacity: 0;
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible {
  opacity: 1;
}