/* ========== Global ========== */

:root {
  --bg-page: #050814;
  --bg-elevated: #0f172a;
  --bg-elevated-soft: #111827;
  --accent: #2563eb;
  --accent-alt: #38bdf8;
  --accent-soft: #1d4ed8;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --border-subtle: #1f2937;
  --danger: #f97373;
  --radius-lg: 18px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.55);
  --shadow-subtle: 0 10px 25px rgba(15, 23, 42, 0.9);
  --transition-fast: 180ms ease-out;
  --transition-med: 260ms ease;
  --max-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at top left, #172554 0, transparent 55%),
    radial-gradient(circle at bottom right, #0b1120 0, transparent 55%),
    var(--bg-page);
}

/* Layout helpers */

main {
  flex: 1 0 auto;
  padding: 3.5rem 1.25rem 4rem;
}

.section {
  max-width: var(--max-width);
  margin: 0 auto 3rem;
}

.section:last-of-type {
  margin-bottom: 0;
}

h1, h2, h3, h4 {
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

p {
  margin: 0 0 1rem;
  color: var(--text-muted);
}

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

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

/* ========== Header / Nav ========== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(3, 7, 18, 0.98), rgba(3, 7, 18, 0.9));
  border-bottom: 1px solid rgba(15, 23, 42, 0.8);
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  height: 40px;
  width: auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 0.95rem;
  text-transform: uppercase;
}

.brand-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Desktop nav */

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav a {
  font-size: 0.92rem;
  color: var(--text-muted);
  position: relative;
  padding-bottom: 0.15rem;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--accent), var(--accent-alt));
  transition: width var(--transition-fast);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--text-main);
}

.nav a:hover::after,
.nav a:focus-visible::after,
.nav a.nav-active::after {
  width: 100%;
}

.nav a.nav-active {
  color: #f9fafb;
  font-weight: 600;
}

/* Mobile nav */

.nav-toggle {
  display: none;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0.25rem;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: #e5e7eb;
  transition: transform 150ms ease, opacity 150ms ease, background 150ms ease;
}

.nav-toggle-bar + .nav-toggle-bar {
  margin-top: 4px;
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  padding: 0.4rem 1.25rem 0.9rem;
  border-top: 1px solid rgba(15, 23, 42, 0.85);
  background: radial-gradient(circle at top left, #020617 0, #020617 40%, #020617);
}

.mobile-nav a {
  display: block;
  padding: 0.5rem 0;
  font-size: 0.95rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(31, 41, 55, 0.8);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

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

/* ========== Hero (Home) ========== */

.hero {
  max-width: var(--max-width);
  margin: 2.5rem auto 3.5rem;
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.6fr);
  gap: 2.75rem;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.35rem, 3vw + 1.4rem, 3.25rem);
  background: linear-gradient(to right, #e5e7eb, #93c5fd);
  -webkit-background-clip: text;
  color: transparent;
}

.hero-text p {
  font-size: 0.98rem;
  max-width: 36rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0 1.75rem;
}

.badge {
  font-size: 0.75rem;
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  border: 1px solid rgba(55, 65, 81, 0.9);
  color: var(--text-muted);
}

.badge-accent {
  border: none;
  background: radial-gradient(circle at top left, var(--accent-alt), var(--accent-soft));
  color: #e5f2ff;
  box-shadow: 0 0 22px rgba(56, 189, 248, 0.32);
}

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

.hero-actions .btn {
  min-width: 160px;
}

.hero-meta {
  margin-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.hero-meta-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: radial-gradient(circle at center, #bbf7d0, #22c55e);
  box-shadow: 0 0 12px rgba(52, 211, 153, 0.8);
}

/* Hero visual */

.hero-visual {
  position: relative;
  justify-self: center;
}

.hero-orbit {
  width: 270px;
  height: 270px;
  border-radius: 999px;
  border: 1px solid rgba(55, 65, 81, 0.7);
  background:
    radial-gradient(circle at top, #1d4ed8 0, transparent 55%),
    radial-gradient(circle at bottom, #020617 0, #020617 60%);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.hero-orbit::before {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  background: radial-gradient(circle, #60a5fa, #1d4ed8);
  border-radius: 50%;
  top: 12%;
  left: 68%;
  transform: translate(-50%, -50%);
  opacity: 0;
  animation: radarPing 3s infinite;
  box-shadow: 0 0 14px #3b82f6;
}


/* Radar sweeping cone */
.hero-orbit::after {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background: conic-gradient(
    from 0deg,
    rgba(37, 99, 235, 0.0) 0deg,
    rgba(56, 189, 248, 0.18) 20deg,
    rgba(37, 99, 235, 0.0) 40deg
  );
  border-radius: 50%;
  animation: radarSweep 3s linear infinite;
  pointer-events: none;
  filter: blur(2px);
  opacity: 0.9;
}

.hero-orbit .dotted-ring {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: inherit;
  border: 1px dashed rgba(148, 163, 184, 0.45);
}

.hero-logo-ring {
  position: absolute;
  inset: 21%;
  border-radius: inherit;
  background: radial-gradient(circle at center, rgba(15, 23, 42, 0.1), transparent 55%);
}

.hero-logo {
  position: absolute;
  inset: 26%;
  border-radius: inherit;
  overflow: hidden;
}

.hero-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Floating nodes */

.hero-node {
  position: absolute;
  padding: 0.45rem 0.7rem;
  font-size: 0.72rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.96);
  box-shadow: var(--shadow-subtle);
  border: 1px solid rgba(37, 99, 235, 0.8);
  color: var(--text-muted);
  backdrop-filter: blur(10px);
}

.hero-node span {
  font-size: 0.75rem;
  color: #e5e7eb;
  font-weight: 500;
}

.hero-node:nth-child(1) {
  top: -10px;
  right: -12px;
  animation: floatUpDown 5.4s ease-in-out infinite;
}

.hero-node:nth-child(2) {
  bottom: 10px;
  left: -8px;
  animation: floatUpDown 6.1s ease-in-out infinite;
  animation-delay: 0.4s;
}

/* ========== Buttons ========== */

.btn {
  border-radius: 999px;
  padding: 0.75rem 1.6rem;
  font-size: 0.9rem;
  border: 1px solid rgba(59, 130, 246, 0.6);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;

  background: #020617; /* dark pill */
  color: #e5e7eb;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.9);

  transition:
    background var(--transition-med),
    transform 160ms ease-out,
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

/* Hover = bright blue + glow */
.btn:hover {
  background: linear-gradient(to right, var(--accent), var(--accent-alt));
  border-color: transparent;
  color: #f9fafb;
  transform: translateY(-2px);
  box-shadow: 0 22px 40px rgba(37, 99, 235, 0.75);
}

/* Active (pressed) */
.btn:active {
  transform: translateY(0);
  box-shadow: 0 10px 18px rgba(15, 23, 42, 0.9);
}

/* These classes now just behave like .btn so old HTML still works */
.btn-primary,
.btn-secondary,
.btn-ghost {
  /* no extra styles – they inherit from .btn */
}


/* ========== Cards / Grids ========== */

.card-grid {
  display: grid;
  gap: 1.75rem;
}

.card-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: radial-gradient(circle at top, rgba(30, 64, 175, 0.35), transparent 55%), var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 1.45rem 1.25rem 1.4rem;
  border: 1px solid rgba(31, 41, 55, 0.9);
  box-shadow: var(--shadow-subtle);
  position: relative;
  overflow: hidden;
  transition:
    transform 180ms ease-out,
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    background 240ms ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 26px 45px rgba(15, 23, 42, 0.95);
  border-color: rgba(59, 130, 246, 0.9);
}

.card-title {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}

.card-tag {
  position: absolute;
  top: 0.75rem;
  right: 0.9rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  background: linear-gradient(to right, #fbbf24, #f59e0b);
  color: #111827;
  font-weight: 700;
}

.card-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0.2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.card-list li {
  margin-bottom: 0.35rem;
  padding-left: 1.1rem;
  position: relative;
}

.card-list li::before {
  content: "";
  position: absolute;
  left: 0.2rem;
  top: 0.55rem;
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: radial-gradient(circle at center, var(--accent-alt), var(--accent));
}

/* ========== Page headings / intro text ========== */

.page-header {
  max-width: var(--max-width);
  margin: 0 auto 2.5rem;
  text-align: center;
}

.page-title {
  font-size: clamp(1.9rem, 2.3vw + 1.2rem, 2.4rem);
}

.page-lead {
  max-width: 40rem;
  margin: 0.75rem auto 0;
  font-size: 0.97rem;
}

/* ========== About & content blocks ========== */

.columns-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.4rem;
}

.content-block {
  background: var(--bg-elevated-soft);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.3rem;
  border: 1px solid rgba(31, 41, 55, 0.95);
  box-shadow: var(--shadow-subtle);
}

.content-block h3 {
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
}

.text-left {
  text-align: left;
}

/* ========== Contact ========== */

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.2fr);
  gap: 2rem;
  align-items: flex-start;
}

.contact-card {
  background: var(--bg-elevated-soft);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.35rem;
  border: 1px solid rgba(31, 41, 55, 0.95);
  box-shadow: var(--shadow-subtle);
}

.contact-meta {
  font-size: 0.9rem;
}

.contact-meta p {
  margin-bottom: 0.45rem;
}

.contact-form {
  display: grid;
  gap: 0.9rem;
  margin-top: 0.6rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  text-align: left;
}

.field label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.input,
.textarea {
  border-radius: 10px;
  border: 1px solid rgba(55, 65, 81, 0.95);
  background: #020617;
  color: var(--text-main);
  padding: 0.6rem 0.7rem;
  font-size: 0.9rem;
  outline: none;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background 160ms ease;
}

.input:focus,
.textarea:focus {
  border-color: rgba(59, 130, 246, 0.9);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.7);
}

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

/* ========== Footer ========== */

.site-footer {
  margin-top: auto;
  border-top: 1px solid rgba(15, 23, 42, 0.9);
  background: radial-gradient(circle at top, #020617 0, #020617 60%);
}

.site-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.7rem 1.25rem 1.6rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: center;
  margin-bottom: 1.1rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.footer-links a {
  padding: 0.2rem 0;
}

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

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.8rem;
}

/* ========== Animations ========== */

@keyframes floatUpDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes sweepOrbit {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.fade-in-up {
  opacity: 0;
  transform: translateY(10px);
  animation: fadeInUp 520ms var(--transition-med) forwards;
}

.fade-in-up.delay-1 {
  animation-delay: 80ms;
}

.fade-in-up.delay-2 {
  animation-delay: 160ms;
}

.fade-in-up.delay-3 {
  animation-delay: 260ms;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== Responsive tweaks ========== */

@media (max-width: 960px) {
  .hero,
  .contact-layout,
  .card-grid--3,
  .columns-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    text-align: center;
  }

  .hero-text p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-badges {
    justify-content: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-meta {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }
}

@media (max-width: 800px) {
  .nav {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .mobile-nav.is-open {
    display: block;
  }

  main {
    padding-top: 2.6rem;
  }
}

@media (max-width: 640px) {
  .site-header-inner {
    padding-inline: 1rem;
  }

  main {
    padding-inline: 1rem;
  }

  .card {
    padding-inline: 1.1rem;
  }
}

@keyframes radarSweep {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes radarPing {
  0% { opacity: 0; transform: scale(0.4); }
  10% { opacity: 1; transform: scale(1); }
  20% { opacity: 0.4; transform: scale(1.5); }
  40% { opacity: 0; transform: scale(0.4); }
  100% { opacity: 0; }
}