/* ============================================================
   EIFERONE — SHARED DESIGN SYSTEM
   Single source of truth for tokens, nav, footer, typography,
   buttons, cards, layout, and responsive rules.
   ============================================================ */

/* ── DESIGN TOKENS ────────────────────────────────────────── */
:root {
  /* Backgrounds — lighter than before */
  --black:   #0d0d10;       /* page bg (was #080809) */
  --dark:    #141418;       /* section alt bg (was #0f0f11) */
  --mid:     #1c1c22;       /* (was #161619) */
  --card:    #22222a;       /* card bg (was #1a1a1e) */

  /* Borders */
  --border:  #2e2e36;       /* (was #252528) */
  --border2: #3c3c48;       /* (was #323236) */

  /* Text — vibrant & readable */
  --white:   #F3F4F6;       /* headings — crisp off-white */
  --accent:  #E2E8F0;       /* hover/accent */
  --accent2: #CBD5E1;       /* secondary accent */
  --text:    #E2E8F0;       /* body text — high contrast on dark */
  --silver:  #9CA3AF;       /* secondary text */
  --muted:   #6B7280;       /* labels, tags */

  /* Utility */
  --dim:     rgba(255,255,255,0.05);
  --nav-h:   64px;

  /* Nav glass */
  --nav-bg:  rgba(13,13,16,0.90);
}

/* ── RESET & BASE ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--text);
  font-family: 'Barlow', sans-serif;
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Scrollbar */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

/* Film-grain overlay */
body::after {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 9999; opacity: 0.28;
}

/* ── TYPOGRAPHY ───────────────────────────────────────────── */
h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(3.2rem, 6.5vw, 5.5rem);
  line-height: 0.95; letter-spacing: 0.02em;
  color: var(--white); margin-bottom: 1.5rem;
}
h1 em { color: var(--accent); font-style: normal; }

h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  letter-spacing: 0.03em; color: var(--white);
  line-height: 1; margin-bottom: 1rem;
}

h3 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 1.05rem; font-weight: 700;
  letter-spacing: 0.03em; color: var(--white);
  text-transform: uppercase;
}

/* ── LAYOUT ───────────────────────────────────────────────── */
section { padding: 5.5rem 5%; }

.section-tag {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.2em;
  margin-bottom: 0.6rem;
}

.section-lead {
  font-size: 1rem; color: var(--silver);
  max-width: 560px; margin-bottom: 3rem;
}

.divider-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

/* ── NAVIGATION ───────────────────────────────────────────── */
nav.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 5%;
  height: var(--nav-h);
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo-wrap { display: flex; align-items: center; text-decoration: none; }
.logo-img  { height: 38px; width: auto; }

.nav-links {
  display: flex; gap: 1.8rem;
  list-style: none; align-items: center;
}

.nav-links a {
  color: var(--silver); text-decoration: none;
  font-size: 0.78rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--white); }

/* Services dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown > a {
  display: flex; align-items: center; gap: 0.3rem; cursor: pointer;
}
.nav-dropdown > a::after {
  content: '';
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid var(--muted);
  transition: transform 0.2s, border-top-color 0.2s;
  flex-shrink: 0; margin-top: 1px;
}
.nav-dropdown:hover > a::after,
.nav-dropdown.open > a::after { transform: rotate(180deg); border-top-color: var(--white); }

.dropdown-menu {
  display: none;
  position: absolute; top: calc(100% + 0.75rem); left: 50%;
  transform: translateX(-50%);
  background: rgba(18,18,22,0.98); backdrop-filter: blur(20px);
  border: 1px solid var(--border2); border-radius: 4px;
  min-width: 240px; padding: 0.5rem 0;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  animation: dropIn 0.2s ease;
}
.nav-dropdown:hover .dropdown-menu,
.nav-dropdown.open .dropdown-menu { display: block; }

@keyframes dropIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-8px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.dropdown-menu a {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.65rem 1.2rem;
  color: var(--text) !important; font-size: 0.82rem !important;
  text-transform: none !important; letter-spacing: 0.02em !important;
  font-weight: 400 !important;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s, color 0.15s, padding-left 0.15s !important;
}
.dropdown-menu a:last-child { border-bottom: none; }
.dropdown-menu a:hover { background: var(--dim); color: var(--white) !important; padding-left: 1.5rem; }
.dropdown-menu a .dmicon { color: var(--muted); flex-shrink: 0; }

/* Nav CTA */
.nav-cta {
  background: var(--white) !important;
  color: var(--black) !important;
  padding: 0.45rem 1.2rem;
  border-radius: 2px; border: none !important;
  font-family: 'Barlow Condensed', sans-serif !important;
  font-weight: 700 !important; font-size: 0.78rem !important;
  letter-spacing: 0.08em !important;
  transition: background 0.2s, box-shadow 0.2s !important;
}
.nav-cta:hover {
  background: var(--accent) !important;
  color: var(--black) !important;
  box-shadow: 0 0 20px rgba(255,255,255,0.14) !important;
}

/* Hamburger */
.nav-hamburger {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; background: transparent;
  border: 1px solid var(--border);
  padding: 0.5rem 0.6rem; border-radius: 2px;
  cursor: pointer; z-index: 1100;
}
.nav-hamburger span {
  display: block; width: 20px; height: 1.5px;
  background: var(--accent2);
  transition: transform 0.3s, opacity 0.3s;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile nav */
.mobile-nav {
  display: none; position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: rgba(13,13,16,0.98); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border); z-index: 999;
  padding: 1.5rem 5%;
  animation: mobileNavIn 0.25s ease;
}
.mobile-nav.open { display: block; }

@keyframes mobileNavIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.mobile-nav ul { list-style: none; }
.mobile-nav ul li a {
  display: block; padding: 0.85rem 0;
  color: var(--text); text-decoration: none;
  font-size: 0.95rem; letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}
.mobile-nav ul li:last-child a { border-bottom: none; }
.mobile-nav ul li a:hover { color: var(--white); }

.mobile-nav-cta {
  display: block; margin-top: 1.25rem; text-align: center;
  background: var(--white); color: var(--black) !important;
  padding: 0.9rem; border-radius: 2px;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700; font-size: 0.95rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none;
}

/* ── BUTTONS ──────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--white); color: var(--black);
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700; font-size: 0.9rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 0.85rem 2rem; border-radius: 2px;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  box-shadow: 0 0 24px rgba(255,255,255,0.08);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(255,255,255,0.16);
  background: var(--accent);
}

.btn-ghost {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border: 1px solid var(--border2); color: var(--text);
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 600; font-size: 0.9rem;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 0.85rem 2rem; border-radius: 2px;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
}
.btn-ghost:hover { border-color: var(--accent2); color: var(--white); }

/* ── FOOTER ───────────────────────────────────────────────── */
footer.site-footer {
  background: #0a0a0d;
  border-top: 1px solid var(--border);
  padding: 3rem 5% 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem; margin-bottom: 2.5rem;
}

.footer-brand p {
  font-size: 0.85rem; color: var(--silver);
  margin-top: 0.75rem; line-height: 1.7; max-width: 280px;
}
.footer-logo-img { height: 42px; width: auto; }

.footer-col h4 {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 1rem;
}

.footer-col a {
  display: flex; align-items: center; gap: 0.5rem;
  color: var(--silver); text-decoration: none;
  font-size: 0.85rem; margin-bottom: 0.5rem;
  transition: color 0.2s; cursor: pointer;
}
.footer-col a:hover { color: var(--white); }

.footer-social-icon { width: 16px; height: 16px; flex-shrink: 0; }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
  font-size: 0.78rem; color: var(--silver);
  font-family: 'Share Tech Mono', monospace;
}
.footer-bottom-links { display: flex; gap: 1.5rem; }
.footer-bottom-links a { color: var(--silver); text-decoration: none; }
.footer-bottom-links a:hover { color: var(--white); }

/* ── RESPONSIVE ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; visibility: hidden; pointer-events: none; }
  .nav-hamburger { display: flex; }
  section { padding: 4rem 5%; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
/* ── SCROLL BUTTON (bottom-right, shared across all pages) ── */
.scroll-fab {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 900;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(13,13,16,0.85);
  border: 1px solid var(--border2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--silver);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.25s, opacity 0.25s;
  box-shadow: 0 4px 20px rgba(0,0,0,0.45);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}
.scroll-fab.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.scroll-fab:hover {
  background: rgba(30,30,40,0.95);
  border-color: var(--silver);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0,0,0,0.55);
}
.scroll-fab svg {
  width: 18px;
  height: 18px;
  transition: transform 0.2s;
}
.scroll-fab.at-bottom svg {
  transform: rotate(180deg);
}