/* Zybercore IT — lavender + black / white design system */

:root {
  --color-black: #0a0a0b;
  --color-ink: #141416;
  --color-muted: #5c5c66;
  --color-border: #e8e8ec;
  --color-border-strong: #d4d4dc;
  --color-white: #fafafa;
  --color-surface: #ffffff;
  --color-lavender: #c4b5fd;
  --color-lavender-deep: #7c6af0;
  --color-lavender-soft: #ede9fe;
  --color-lavender-wash: #f5f3ff;

  --font-display: "Sora", sans-serif;
  --font-body: "Source Sans 3", sans-serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --container: 1120px;
  --header-h: 64px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-sm: 0 1px 2px rgba(10, 10, 11, 0.04);
  --shadow-focus: 0 0 0 3px rgba(124, 106, 240, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--color-lavender-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--color-black);
}

a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

h1,
h2,
h3,
.brand-text {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--color-black);
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  margin: 0 0 var(--space-5);
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  margin: 0 0 var(--space-4);
}

h3 {
  font-size: 1.125rem;
  margin: 0 0 var(--space-2);
  letter-spacing: -0.02em;
}

p {
  margin: 0 0 var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

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

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-4);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(250, 250, 250, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-black);
}

.brand-text {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.brand-text span {
  color: var(--color-lavender-deep);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--color-black);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-black);
  color: var(--color-white) !important;
  text-decoration: none !important;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.nav-cta:hover {
  background: var(--color-lavender-deep);
  color: var(--color-white) !important;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}

.nav-toggle-bars {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-black);
  box-shadow: 0 -6px 0 var(--color-black), 0 6px 0 var(--color-black);
}

.nav-checkbox {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.8rem 1.35rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn-primary {
  background: var(--color-black);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-lavender-deep);
  color: var(--color-white);
}

.btn-secondary {
  background: transparent;
  color: var(--color-black);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  border-color: var(--color-lavender-deep);
  color: var(--color-lavender-deep);
  background: var(--color-lavender-wash);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  isolation: isolate;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 85% 15%, rgba(196, 181, 253, 0.55), transparent 55%),
    radial-gradient(ellipse 50% 40% at 10% 90%, rgba(237, 233, 254, 0.9), transparent 50%),
    linear-gradient(180deg, var(--color-lavender-wash) 0%, var(--color-white) 72%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(10, 10, 11, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 10, 11, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 75%);
  animation: grid-drift 28s linear infinite;
}

.hero-inner {
  padding: var(--space-20) 0 var(--space-24);
  max-width: 42rem;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2vw, 1.125rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-lavender-deep);
  margin: 0 0 var(--space-5);
  animation: fade-up 0.7s var(--ease) both;
}

.hero h1 {
  animation: fade-up 0.7s var(--ease) 0.08s both;
}

.hero-lead {
  font-size: clamp(1.0625rem, 2vw, 1.2rem);
  color: var(--color-muted);
  max-width: 36rem;
  animation: fade-up 0.7s var(--ease) 0.16s both;
}

.hero-actions {
  animation: fade-up 0.7s var(--ease) 0.24s both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes grid-drift {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(48px);
  }
}

/* ---------- Sections ---------- */

.section {
  padding: var(--space-20) 0;
}

.section-alt {
  background: var(--color-lavender-wash);
  border-block: 1px solid var(--color-border);
}

.section-header {
  max-width: 36rem;
  margin-bottom: var(--space-12);
}

.section-kicker {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-lavender-deep);
  margin: 0 0 var(--space-3);
}

.section-subtitle {
  color: var(--color-muted);
  font-size: 1.0625rem;
  margin: 0;
}

/* ---------- Services ---------- */

.service-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--color-border);
}

.service-list li {
  padding: var(--space-8) var(--space-6) var(--space-8) 0;
  border-bottom: 1px solid var(--color-border);
}

.service-list li:nth-child(3n + 2),
.service-list li:nth-child(3n + 3) {
  padding-left: var(--space-6);
  border-left: 1px solid var(--color-border);
}

.service-list h3 {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.service-index {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-lavender-deep);
  letter-spacing: 0.04em;
}

.service-list p {
  color: var(--color-muted);
  font-size: 0.9875rem;
}

/* ---------- Engagement ---------- */

.engagement-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.engagement-item {
  padding-top: var(--space-5);
  border-top: 2px solid var(--color-lavender);
}

.engagement-item p {
  color: var(--color-muted);
  font-size: 0.9875rem;
}

/* ---------- Contact ---------- */

.contact-panel {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.contact-details {
  list-style: none;
  margin: var(--space-8) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-6);
}

.contact-details dt {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-2);
}

.contact-details dd {
  margin: 0;
  font-size: 1.0625rem;
  color: var(--color-black);
}

.contact-details a {
  color: var(--color-black);
  text-decoration: none;
  border-bottom: 1px solid var(--color-lavender);
}

.contact-details a:hover {
  color: var(--color-lavender-deep);
  border-bottom-color: var(--color-lavender-deep);
}

.contact-aside {
  padding: var(--space-8);
  background: var(--color-black);
  color: rgba(250, 250, 250, 0.78);
  border-radius: var(--radius-lg);
}

.contact-aside h3 {
  color: var(--color-white);
  font-size: 1.25rem;
  margin-bottom: var(--space-3);
}

.contact-aside .btn {
  margin-top: var(--space-6);
  background: var(--color-lavender);
  color: var(--color-black);
}

.contact-aside .btn:hover {
  background: var(--color-white);
  color: var(--color-black);
}

/* ---------- Footer ---------- */

.site-footer {
  padding: var(--space-10) 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer-meta {
  font-size: 0.875rem;
  color: var(--color-muted);
}

.footer-meta strong {
  color: var(--color-black);
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: var(--space-5);
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-lavender-deep);
}

/* ---------- Legal pages ---------- */

.page-hero {
  padding: var(--space-16) 0 var(--space-10);
  background: linear-gradient(180deg, var(--color-lavender-wash), var(--color-white));
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

.page-hero .meta {
  color: var(--color-muted);
  font-size: 0.9375rem;
  margin: 0;
}

.legal-content {
  padding: var(--space-12) 0 var(--space-20);
  max-width: 46rem;
}

.legal-content h2 {
  font-size: 1.25rem;
  margin-top: var(--space-10);
  margin-bottom: var(--space-3);
}

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

.legal-content p,
.legal-content li {
  color: var(--color-muted);
  font-size: 1rem;
}

.legal-content ul {
  padding-left: 1.25rem;
  margin: 0 0 var(--space-4);
}

.legal-content li {
  margin-bottom: var(--space-2);
}

.legal-content a {
  color: var(--color-lavender-deep);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .service-list {
    grid-template-columns: 1fr 1fr;
  }

  .service-list li:nth-child(3n + 2),
  .service-list li:nth-child(3n + 3) {
    padding-left: 0;
    border-left: none;
  }

  .service-list li:nth-child(even) {
    padding-left: var(--space-6);
    border-left: 1px solid var(--color-border);
  }

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

  .contact-panel {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
  }

  #nav-toggle:checked ~ .site-nav {
    display: flex;
  }

  .site-nav a {
    padding: var(--space-3) var(--space-2);
    border-radius: var(--radius-sm);
  }

  .nav-cta {
    margin-top: var(--space-2);
    justify-content: center;
  }

  .header-inner {
    position: relative;
  }

  .service-list {
    grid-template-columns: 1fr;
  }

  .service-list li:nth-child(even) {
    padding-left: 0;
    border-left: none;
  }

  .service-list li {
    padding-right: 0;
  }

  .section {
    padding: var(--space-16) 0;
  }

  .hero-inner {
    padding: var(--space-16) 0 var(--space-20);
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero::before {
    animation: none;
  }

  .hero-brand,
  .hero h1,
  .hero-lead,
  .hero-actions {
    animation: none;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}