/* ============================================================
   Ellis Consulting — styles.css
   ============================================================ */

:root {
  --ink: #16181d;
  --ink-soft: #3c414b;
  --paper: #ffffff;
  --line: rgba(22, 24, 29, 0.12);

  --blue: #cdeef2;
  --blue-deep: #12707d;
  --lavender: #c9c9ee;
  --lavender-deep: #4a4a9c;
  --green: #c9f0c9;
  --green-deep: #2e7d32;

  --accent: #12707d;

  --serif: "Cormorant Garamond", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container: 1120px;
  --header-h: 76px;
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(var(--container), 100% - 3rem);
  margin-inline: auto;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 24px rgba(22, 24, 29, 0.06);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-logo {
  height: 44px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  text-decoration: none;
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-cta {
  color: var(--paper);
  background: var(--ink);
  padding: 0.55rem 1.25rem;
  border-radius: 999px;
  transition: background 0.25s ease, transform 0.25s ease;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--accent); color: var(--paper); transform: translateY(-1px); }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 10px;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */

.hero {
  position: relative;
  padding: clamp(5rem, 12vw, 9rem) 0 clamp(4rem, 10vw, 7rem);
  background:
    radial-gradient(ellipse 60% 50% at 85% 10%, rgba(205, 238, 242, 0.55), transparent 70%),
    radial-gradient(ellipse 50% 45% at 10% 90%, rgba(201, 240, 201, 0.45), transparent 70%),
    var(--paper);
  overflow: hidden;
}

.hero-inner { max-width: 820px; }

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.6rem, 6.5vw, 4.6rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin-bottom: 1.5rem;
}

.hero-title em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--ink-soft);
  max-width: 60ch;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.9rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(18, 112, 125, 0.25);
}

.btn-ghost {
  color: var(--ink);
  border: 1.5px solid var(--ink);
}
.btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-2px);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 38px;
  border: 2px solid var(--line);
  border-radius: 14px;
}

.hero-scroll-hint span {
  position: absolute;
  top: 7px;
  left: 50%;
  width: 3px;
  height: 8px;
  margin-left: -1.5px;
  border-radius: 3px;
  background: var(--ink-soft);
  animation: scrollDot 1.8s ease-in-out infinite;
}

@keyframes scrollDot {
  0%   { transform: translateY(0); opacity: 1; }
  70%  { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ============ Panels (content sections) ============ */

.panel { padding: clamp(4rem, 9vw, 7rem) 0; }

.panel--blue     { background: var(--blue); }
.panel--lavender { background: var(--lavender); }
.panel--green    { background: var(--green); }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2.25rem;
}

.section-num {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink-soft);
  opacity: 0.55;
  letter-spacing: 0.1em;
}

.section-head h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
}

.prose {
  max-width: 72ch;
  font-size: 1.02rem;
  color: var(--ink);
}

.prose p + p { margin-top: 1.15rem; }

/* Services layout */
.services-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 3rem;
  align-items: start;
}

.services-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem 2rem;
}

.services-list li {
  position: relative;
  padding-left: 1.6rem;
  font-size: 0.98rem;
}

.services-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lavender-deep);
}

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

.contact {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(4rem, 9vw, 6.5rem) 0;
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
}

.contact-logo {
  height: auto;
  width: min(340px, 100%);
  margin-inline: auto;
  filter: invert(1) brightness(1.6);
}

.contact h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 1.25rem;
}

.contact address {
  font-style: normal;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1.25rem;
}

.contact-links { font-size: 1.05rem; }

.contact-links a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
  transition: border-color 0.25s ease, color 0.25s ease;
}

.contact-links a:hover {
  color: #9fdbe4;
  border-color: #9fdbe4;
}

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

.site-footer {
  background: var(--ink);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 1.25rem 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.back-to-top {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.25s ease;
}
.back-to-top:hover { color: #9fdbe4; }

/* ============ Reveal on scroll ============ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-scroll-hint { display: none; }
}

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

@media (max-width: 900px) {
  .services-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
}

@media (max-width: 760px) {
  :root { --header-h: 64px; }

  .brand-logo { height: 36px; }

  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 32px rgba(22, 24, 29, 0.1);
    padding: 0.5rem 1.5rem 1rem;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
  }

  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav .nav-link {
    padding: 0.9rem 0.25rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--line);
  }
  .site-nav .nav-link:last-child { border-bottom: 0; }

  .nav-cta {
    text-align: center;
    margin-top: 0.75rem;
    border-radius: 999px;
  }
  .nav-cta::after { display: none; }

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

  .hero-scroll-hint { display: none; }
}

@media (max-width: 420px) {
  .hero-actions .btn { width: 100%; text-align: center; }
  .footer-inner { justify-content: center; text-align: center; }
}