/* ==========================================================================
   OPELOGY — Global Stylesheet
   IT Agency Template  |  Theme: Dark Slate / Deep Navy + Electric Cyan
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens (CSS Variables)
   Centralize colors, spacing, typography and shadows here so the whole
   theme can be restyled from one place.
   -------------------------------------------------------------------------- */
:root {
  /* --- Color palette: backgrounds --- */
  --bg-base: #020b18;          /* deep navy — page background              */
  --bg-surface: #051329;       /* elevated surface (cards, panels)         */
  --bg-surface-alt: #0a1a36;   /* hover / raised surfaces                  */
  --bg-nav: rgba(2, 11, 24, 0.85); /* translucent navbar background        */

  /* --- Color palette: text --- */
  --text-primary: #e2e8f0;     /* slate-200  — headings & body             */
  --text-secondary: #94a3b8;   /* slate-400  — muted copy                  */
  --text-muted: #64748b;       /* slate-500  — captions, placeholders      */

  /* --- Color palette: accents --- */
  --accent: #00d2ff;           /* electric cyan/blue — primary accent      */
  --accent-strong: #0097cc;    /* deeper cyan — hover / active             */
  --accent-glow: rgba(0, 210, 255, 0.35); /* glow for CTA & focus         */

  /* --- Color palette: borders --- */
  --border: #1e293b;           /* slate-800  — subtle dividers             */

  /* --- Typography --- */
  --font-sans: 'Inter', 'Poppins', system-ui, -apple-system, 'Segoe UI',
               Roboto, Arial, sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.5rem;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* --- Layout --- */
  --container-max: 80rem;      /* 1280px max content width                 */
  --container-pad: 1.25rem;    /* horizontal padding, mobile               */
  --nav-height: 4.5rem;        /* 72px                                    */

  /* --- Spacing scale --- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* --- Effects --- */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-full: 9999px;
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 24px var(--accent-glow);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   2. Reset & Base
   Minimal, dependency-free reset with sensible inherited defaults.
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;            /* smooth anchor scrolling */
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-base);
  background-image:
    linear-gradient(180deg, #020b18 0%, #051329 100%),
    radial-gradient(circle at 15% 0%, rgba(0, 210, 255, 0.06), transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(0, 210, 255, 0.05), transparent 40%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }

/* --- Focus visibility for accessibility --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   3. Typography helpers
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--fw-bold);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

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

/* --------------------------------------------------------------------------
   4. Layout primitives
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* Flexible grid used by the footer and other multi-column sections */
.grid {
  display: grid;
  gap: var(--space-8);
}

/* --------------------------------------------------------------------------
   5. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.65rem 1.5rem;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-full);
  transition: transform var(--transition), box-shadow var(--transition),
              background-color var(--transition), border-color var(--transition);
}

/* Primary CTA — vibrant cyan */
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #041018;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Ghost / outline button for secondary actions */
.btn-outline {
  border: 1px solid var(--border);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Small variant used inside the navbar */
.btn-sm { padding: 0.5rem 1.25rem; }

/* --------------------------------------------------------------------------
   6. Header / Navbar
   Fixed, translucent, transitions to a solid glass effect on scroll.
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition),
              box-shadow var(--transition);
}

/* Glass effect once the page is scrolled */
.site-header.is-scrolled {
  background: rgba(2, 6, 23, 0.95);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.navbar {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* --- Logo --- */
.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
}
.logo-mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  display: grid;
  place-items: center;
  color: #041018;
  font-weight: var(--fw-bold);
  box-shadow: var(--shadow-glow);
}

/* Uploaded logo image — matches the mark height, keeps aspect ratio */
.logo-img {
  height: 2.25rem;
  width: auto;
  max-width: 12rem;
  object-fit: contain;
  flex-shrink: 0;
}

/* --- Desktop navigation --- */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  padding: var(--space-2) 0;
  transition: color 0.2s ease, transform 0.2s ease;
}

/* Navbar icon sizing — inherits text color, cyan on hover/active */
.nav-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Services dropdown trigger (same layout as .nav-link) */
.nav-dropdown-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Animated underline on hover / active */
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  border-radius: var(--radius-full);
  background: var(--accent);
  transition: width var(--transition);
}
.nav-link:hover,
.nav-link.is-active { color: var(--text-primary); }
.nav-link:hover::after,
.nav-link.is-active::after { width: 100%; }

/* --- Services dropdown (desktop) --- */
.has-dropdown {
  position: relative;
}

/* Chevron that rotates when open */
.has-dropdown .chevron {
  display: inline-block;
  transition: transform var(--transition);
}
.has-dropdown.is-open .chevron { transform: rotate(180deg); }

.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  translate: -50% 0;
  min-width: 15rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  translate: -50% 8px;
  transition: opacity var(--transition), visibility var(--transition),
              translate var(--transition);
  z-index: 100;
}
.has-dropdown.is-open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  translate: -50% 0;
}

.dropdown-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  transition: color 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}
.dropdown-item:hover { background: var(--bg-surface-alt); color: var(--accent); }

/* Dropdown item leading icon */
.dropdown-item svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

/* --- CTA button in the navbar --- */
.nav-cta { flex-shrink: 0; }

/* --- Hamburger toggle (mobile) --- */
.nav-toggle {
  display: none;                 /* hidden on desktop, shown below 768px */
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 2.75rem;
  height: 2.75rem;
  padding: var(--space-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.nav-toggle .bar {
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition), opacity var(--transition);
}

/* Animate hamburger -> close (X) icon */
.nav-toggle.is-open .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.is-open .bar:nth-child(2) { opacity: 0; }
.nav-toggle.is-open .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   7. Mobile navigation panel
   Slide-down panel rendered under the header on small screens.
   -------------------------------------------------------------------------- */
.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  z-index: 999;
  background: var(--bg-base);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  padding: var(--space-4) var(--container-pad) var(--space-8);
  display: none;                 /* toggled to grid via .is-open */
  overflow: hidden;
}

.mobile-menu.is-open { display: grid; gap: var(--space-2); }

.mobile-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: var(--space-3) var(--space-2);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}
.mobile-link:hover { background: var(--bg-surface-alt); color: var(--accent); }
.mobile-link svg { width: 16px; height: 16px; flex-shrink: 0; }

/* Mobile services toggle: icon + label grouped on the left, chevron on the right */
.mobile-submenu-toggle .toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Highlight the current page in the mobile menu */
.mobile-link.is-active,
.mobile-submenu-toggle.is-active {
  color: var(--accent);
  background: var(--bg-surface-alt);
}

/* Mobile sub-links (services dropdown) — collapsed by default */
.mobile-submenu {
  display: grid;
  gap: var(--space-1);
  padding-left: var(--space-4);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}
.mobile-submenu.is-open { max-height: 15rem; }

.mobile-submenu a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: var(--space-3) var(--space-2);
  font-size: var(--fs-base);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}
.mobile-submenu a:hover { background: var(--bg-surface-alt); color: var(--accent); }
.mobile-submenu a svg { width: 16px; height: 16px; flex-shrink: 0; }

/* Mobile services toggle with rotating chevron */
.mobile-submenu-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.mobile-submenu-toggle .chevron { transition: transform var(--transition); }
.mobile-submenu-toggle.is-open .chevron { transform: rotate(180deg); }

/* CTA button shown inside the mobile menu */
.mobile-cta { margin-top: var(--space-4); }

/* --------------------------------------------------------------------------
   8. Main content area
   Pushes content below the fixed header so it isn't hidden behind it.
   -------------------------------------------------------------------------- */
.site-main {
  flex: 1;                       /* keeps the footer pinned to the bottom */
  padding-top: var(--nav-height);
}

/* --------------------------------------------------------------------------
   9. Footer
   Dark slate footer with a 4-column grid on desktop.
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
}

.footer-grid {
  display: grid;
  gap: var(--space-12);
  grid-template-columns: 1fr;    /* single column on mobile */
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-8);
}

/* 4 columns on tablet & up: About takes extra room */
@media (min-width: 48rem) {      /* 768px */
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
    gap: var(--space-8);
  }
}

.footer-title {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}
.footer-title::after {
  content: '';
  display: block;
  width: 2.25rem;
  height: 2px;
  margin-top: var(--space-2);
  background: var(--accent);
  border-radius: var(--radius-full);
}

.footer-about p {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  margin-top: var(--space-4);
  max-width: 22rem;
}

/* Quick links & services — simple vertical lists */
.footer-links li { margin-bottom: var(--space-3); }
.footer-links a {
  position: relative;
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  transition: color var(--transition), padding-left var(--transition);
}
.footer-links a::before {
  content: '→';
  position: absolute;
  left: 0;
  opacity: 0;
  color: var(--accent);
  transition: opacity var(--transition);
}
.footer-links a:hover {
  color: var(--accent);
  padding-left: 1.25rem;
}
.footer-links a:hover::before { opacity: 1; }

/* Contact details with inline icons */
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}
.footer-contact .icon {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 0.15rem;
}
.footer-contact a:hover { color: var(--text-primary); }

/* --- Social icons --- */
.social-links {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.social-links a {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  color: var(--text-secondary);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: color var(--transition), border-color var(--transition),
              transform var(--transition), box-shadow var(--transition);
}
.social-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}
.social-links svg { width: 1.25rem; height: 1.25rem; }

/* --- Footer bottom bar --- */
.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   10. Responsive breakpoints
   -------------------------------------------------------------------------- */

/* Tablet & down: hide desktop nav, show hamburger */
@media (max-width: 47.99rem) {   /* < 768px */
  .nav-menu,
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
}

/* Larger screens: never show the mobile menu */
@media (min-width: 48rem) {      /* >= 768px */
  .mobile-menu { display: none !important; }
}

/* Slightly wider max-width padding on desktop */
@media (min-width: 64rem) {      /* >= 1024px */
  :root { --container-pad: 2rem; }
}

/* --------------------------------------------------------------------------
   12. Section layout & headings
   -------------------------------------------------------------------------- */
.section { padding-block: var(--space-20); }

/* Slightly elevated band to alternate section backgrounds */
.section-alt {
  background: var(--bg-surface);
  border-block: 1px solid var(--border);
}

.section-head { max-width: 44rem; margin-bottom: var(--space-12); }
.section-head--center { margin-inline: auto; text-align: center; }

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

/* Small accent dash before the eyebrow text */
.section-eyebrow::before {
  content: '';
  width: 1.5rem;
  height: 2px;
  border-radius: var(--radius-full);
  background: var(--accent);
}

.section-title {
  font-size: clamp(var(--fs-2xl), 4vw, var(--fs-3xl));
  margin-bottom: var(--space-4);
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: var(--fs-lg);
}

/* --------------------------------------------------------------------------
   12b. Inner-page hero (shared by Services / Portfolio / Contact pages)
   -------------------------------------------------------------------------- */
.page-hero {
  position: relative;
  padding-block: calc(var(--nav-height) + var(--space-16)) var(--space-16);
  text-align: center;
}

/* Soft cyan glow at the top of the hero */
.page-hero::before {
  content: '';
  position: absolute;
  top: -6rem;
  left: 50%;
  translate: -50% 0;
  width: 42rem;
  max-width: 90vw;
  height: 22rem;
  background: radial-gradient(ellipse, rgba(0, 210, 255, 0.16), transparent 70%);
  pointer-events: none;
}

.page-hero > * { position: relative; }

.page-hero .section-eyebrow { justify-content: center; }

.page-hero-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  max-width: 48rem;
  margin: 0 auto var(--space-4);
}

.page-hero-subtitle {
  color: var(--text-secondary);
  font-size: var(--fs-lg);
  max-width: 40rem;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   12c. Bottom CTA banner (shared by Home / Services / Portfolio pages)
   High-contrast gradient panel that closes a page.
   -------------------------------------------------------------------------- */
.cta-banner {
  position: relative;
  overflow: hidden;
  text-align: center;
  border: 1px solid rgba(0, 210, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: var(--space-16) var(--space-8);
  background:
    radial-gradient(60% 120% at 12% 8%, rgba(0, 210, 255, 0.25), transparent 60%),
    radial-gradient(50% 110% at 90% 15%, rgba(37, 99, 235, 0.3), transparent 60%),
    radial-gradient(70% 130% at 50% 110%, rgba(124, 58, 237, 0.22), transparent 65%),
    linear-gradient(135deg, #020b18, #051329 55%, #071a38);
  box-shadow: var(--shadow-card);
}

.cta-banner h2 {
  font-size: clamp(var(--fs-xl), 4vw, var(--fs-3xl));
  margin-bottom: var(--space-4);
}

.cta-banner p {
  color: var(--text-secondary);
  max-width: 36rem;
  margin: 0 auto var(--space-8);
}

/* Row of buttons inside the bottom CTA banner */
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

/* --------------------------------------------------------------------------
   13. Cards
   Base card + hover lift. Individual cards add their own inner layout.
   -------------------------------------------------------------------------- */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: transform var(--transition), border-color var(--transition),
              box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 210, 255, 0.4);
  box-shadow: var(--shadow-card);
}

/* --------------------------------------------------------------------------
   14. Icon box
   Cyan-tinted square that hosts inline SVG icons.
   -------------------------------------------------------------------------- */
.icon-box {
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-md);
  background: rgba(0, 210, 255, 0.1);
  border: 1px solid rgba(0, 210, 255, 0.3);
  color: var(--accent);
  margin-bottom: var(--space-6);
}
.icon-box svg { width: 1.6rem; height: 1.6rem; }

/* --------------------------------------------------------------------------
   15. Badges & tags
   Small pill labels used for categories and featured tags.
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.3rem 0.8rem;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  border-radius: var(--radius-full);
  background: rgba(0, 210, 255, 0.12);
  border: 1px solid rgba(0, 210, 255, 0.35);
  color: var(--accent);
}

.badge--ghost {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border);
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   16. Reduced motion preference
   Respect users who disable motion in their OS settings.
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}