/* ============================================================
   WEB METRICS CONSULTING — style.css
   Meridian Signal Design System
   ============================================================ */

/* ── CUSTOM PROPERTIES ─────────────────────────────────────── */
:root {
  --dark:        #0C1220;
  --indigo:      #1A2B4A;
  --slate:       #4E6480;
  --light-slate: #8FA3BC;
  --amber:       #C8874A;
  --amber-light: #D9A06E;
  --cream:       #F5F1EA;
  --white:       #FFFFFF;

  --font-main: 'Work Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  --nav-h:   72px;
  --max-w:   1200px;
  --section-pad: 100px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 6px;
}

/* ── RESET ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--dark);
  color: var(--cream);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── TYPOGRAPHY ─────────────────────────────────────────────── */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.15; }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); letter-spacing: -0.02em; }
h3 { font-size: 1.2rem; font-weight: 600; }
p  { font-size: 1rem; line-height: 1.7; }

.label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}

/* ── LAYOUT HELPERS ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}
.section-header {
  max-width: 680px;
  margin-bottom: 64px;
}
.section-header .label { margin-bottom: 14px; display: block; }
.section-header h2 { margin-bottom: 18px; }
.section-header p  { color: var(--light-slate); font-size: 1.05rem; }

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--amber);
  color: var(--dark);
}
.btn-primary:hover {
  background: var(--amber-light);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(200,135,74,0.25);
}
.btn-ghost {
  background: transparent;
  color: var(--cream);
  border: 1.5px solid rgba(245,241,234,0.20);
}
.btn-ghost:hover {
  border-color: rgba(245,241,234,0.50);
  background: rgba(245,241,234,0.05);
}

/* ── AMBER RULE ─────────────────────────────────────────────── */
.amber-rule {
  width: 40px;
  height: 2px;
  background: var(--amber);
  margin-bottom: 24px;
}

/* ── SCROLL REVEAL ──────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.10s; }
.reveal-delay-2 { transition-delay: 0.20s; }
.reveal-delay-3 { transition-delay: 0.30s; }
.reveal-delay-4 { transition-delay: 0.40s; }
.reveal-delay-5 { transition-delay: 0.50s; }

/* ════════════════════════════════════════════════════════════
   NAV
   ════════════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: background 0.35s var(--ease), backdrop-filter 0.35s var(--ease),
              border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(12, 18, 32, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-color: rgba(78, 100, 128, 0.18);
  box-shadow: 0 4px 32px rgba(0,0,0,0.25);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 13px;
  flex-shrink: 0;
}
.nav-logo svg { flex-shrink: 0; }
.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
  gap: 3px;
}
.nav-logo-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--cream);
  letter-spacing: -0.01em;
}
.nav-logo-sub {
  font-size: 0.60rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--light-slate);
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--light-slate);
  transition: color 0.2s;
  letter-spacing: 0.01em;
}
.nav-links a:hover { color: var(--cream); }
.nav-cta { margin-left: 16px; padding: 10px 22px; font-size: 0.85rem; }

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 2px;
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--cream);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile nav drawer */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: rgba(12, 18, 32, 0.98);
  backdrop-filter: blur(14px);
  padding: 28px 32px 36px;
  border-bottom: 1px solid rgba(78,100,128,0.18);
  flex-direction: column;
  gap: 0;
  z-index: 99;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  padding: 14px 0;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--light-slate);
  border-bottom: 1px solid rgba(78,100,128,0.12);
  transition: color 0.2s;
}
.nav-mobile a:hover { color: var(--cream); }
.nav-mobile .btn { margin-top: 20px; width: fit-content; }

/* ════════════════════════════════════════════════════════════
   HERO
   ════════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--dark);
  overflow: hidden;
  padding-top: var(--nav-h);
}

/* Radial glow */
.hero::before {
  content: '';
  position: absolute;
  top: 50%; left: -5%;
  transform: translateY(-50%);
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(26,43,74,0.55) 0%, transparent 70%);
  pointer-events: none;
}

.hero-bg-diamond {
  position: absolute;
  right: -4%;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0.07;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding: 80px 0;
}
.hero-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.hero-label-dot {
  width: 6px; height: 6px;
  background: var(--amber);
  border-radius: 50%;
  flex-shrink: 0;
}
.hero h1 {
  margin-bottom: 24px;
  color: var(--cream);
}
.hero h1 span { color: var(--amber); }
.hero-sub {
  font-size: 1.12rem;
  color: var(--light-slate);
  max-width: 560px;
  line-height: 1.75;
  margin-bottom: 44px;
}
.hero-ctas {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.35;
  animation: scrollBounce 2.2s ease-in-out infinite;
}
.hero-scroll span { font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; }
.hero-scroll svg { width: 16px; height: 16px; }
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* Stats row */
.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 60px;
  padding-top: 48px;
  border-top: 1px solid rgba(78,100,128,0.18);
  flex-wrap: wrap;
}
.hero-stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--cream);
  letter-spacing: -0.03em;
  line-height: 1;
}
.hero-stat-num span { color: var(--amber); }
.hero-stat-label {
  font-size: 0.82rem;
  color: var(--light-slate);
  margin-top: 6px;
  letter-spacing: 0.01em;
}

/* ════════════════════════════════════════════════════════════
   SERVICES
   ════════════════════════════════════════════════════════════ */
.services {
  background: var(--cream);
  padding: var(--section-pad) 0;
  color: var(--dark);
}
.services .section-header p { color: var(--slate); }
.services .label { color: var(--amber); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.service-card {
  background: var(--white);
  padding: 40px 36px;
  transition: box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.service-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--amber);
  transition: width 0.35s var(--ease);
}
.service-card:hover::after { width: 100%; }
.service-card:hover {
  box-shadow: 0 12px 40px rgba(26,43,74,0.10);
  transform: translateY(-2px);
}
.service-icon {
  width: 44px; height: 44px;
  background: var(--cream);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.service-icon svg { width: 22px; height: 22px; color: var(--indigo); }
.service-card h3 {
  color: var(--indigo);
  margin-bottom: 14px;
  font-size: 1.08rem;
}
.service-card p {
  color: var(--slate);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 24px;
}
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.service-tag {
  font-size: 0.70rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  color: var(--slate);
  background: var(--cream);
  padding: 4px 10px;
  border-radius: 3px;
  text-transform: uppercase;
}

/* Last row: 2 cards centered */
.services-grid .service-card:nth-child(4) { grid-column: 1 / 2; }
.services-grid .service-card:nth-child(5) { grid-column: 2 / 3; }

/* ════════════════════════════════════════════════════════════
   CASE STUDIES
   ════════════════════════════════════════════════════════════ */
.case-studies {
  background: var(--indigo);
  padding: var(--section-pad) 0;
}
.case-studies .section-header p { color: var(--light-slate); }

.cs-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.cs-card {
  background: rgba(12,18,32,0.45);
  border: 1px solid rgba(143,163,188,0.12);
  padding: 52px 52px;
  display: grid;
  grid-template-columns: 1fr 1.8fr;
  gap: 60px;
  align-items: start;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.cs-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0;
  width: 3px; height: 0;
  background: var(--amber);
  transition: height 0.45s var(--ease);
}
.cs-card:hover::before { height: 100%; }
.cs-card:hover {
  background: rgba(12,18,32,0.65);
  border-color: rgba(200,135,74,0.18);
}
.cs-card-number {
  font-size: 4.5rem;
  font-weight: 700;
  color: rgba(143,163,188,0.10);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.04em;
}
.cs-card-left { padding-top: 4px; }
.cs-card .label { display: block; margin-bottom: 16px; }
.cs-card h3 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--cream);
  line-height: 1.25;
  margin-bottom: 20px;
}
.cs-card-meta { margin-top: 32px; }
.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.cs-tag {
  font-size: 0.70rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  color: var(--amber);
  border: 1px solid rgba(200,135,74,0.30);
  padding: 4px 11px;
  border-radius: 3px;
  text-transform: uppercase;
}
.cs-card-right { display: flex; flex-direction: column; gap: 28px; }
.cs-block-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.cs-block-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(200,135,74,0.18);
}
.cs-block p {
  color: var(--light-slate);
  font-size: 0.95rem;
  line-height: 1.75;
}
.cs-result p { color: var(--cream); }

/* ════════════════════════════════════════════════════════════
   ARTICLES
   ════════════════════════════════════════════════════════════ */
.articles {
  background: var(--cream);
  padding: var(--section-pad) 0;
  color: var(--dark);
}
.articles .section-header p { color: var(--slate); }
.articles .label { color: var(--amber); }

.articles-coming {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(200,135,74,0.12);
  border: 1px solid rgba(200,135,74,0.25);
  color: var(--amber);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 3px;
  margin-top: 18px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.article-card {
  background: var(--white);
  padding: 36px 32px;
  transition: box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.article-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--amber);
  transition: width 0.35s var(--ease);
}
.article-card:hover::after { width: 100%; }
.article-card:hover {
  box-shadow: 0 8px 30px rgba(26,43,74,0.08);
  transform: translateY(-2px);
}
.article-cat {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 16px;
  display: block;
}
.article-card h3 {
  font-size: 1.02rem;
  color: var(--indigo);
  line-height: 1.40;
  margin-bottom: 14px;
  font-weight: 600;
}
.article-card p {
  font-size: 0.88rem;
  color: var(--slate);
  line-height: 1.65;
  margin-bottom: 22px;
}
.article-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--light-slate);
  border: 1px solid rgba(143,163,188,0.25);
  padding: 4px 10px;
  border-radius: 3px;
}

/* ════════════════════════════════════════════════════════════
   CONTACT
   ════════════════════════════════════════════════════════════ */
.contact {
  background: var(--dark);
  padding: var(--section-pad) 0;
  position: relative;
  overflow: hidden;
}
.contact::before {
  content: '';
  position: absolute;
  top: 50%; right: -10%;
  transform: translateY(-50%);
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(26,43,74,0.40) 0%, transparent 70%);
  pointer-events: none;
}
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 80px;
  align-items: start;
  position: relative;
  z-index: 1;
}
.contact-left .label { display: block; margin-bottom: 14px; }
.contact-left h2 { margin-bottom: 20px; }
.contact-left p { color: var(--light-slate); font-size: 1rem; line-height: 1.75; margin-bottom: 36px; }

.contact-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.contact-detail svg { width: 16px; height: 16px; color: var(--amber); flex-shrink: 0; }
.contact-detail span { font-size: 0.90rem; color: var(--light-slate); }
.contact-detail a { color: var(--light-slate); transition: color 0.2s; }
.contact-detail a:hover { color: var(--amber); }

.contact-form {
  background: rgba(26,43,74,0.45);
  border: 1px solid rgba(143,163,188,0.14);
  border-radius: var(--radius);
  padding: 44px 40px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}
.form-group label {
  font-size: 0.80rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--light-slate);
  text-transform: uppercase;
}
.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(12,18,32,0.60);
  border: 1px solid rgba(143,163,188,0.18);
  border-radius: var(--radius);
  color: var(--cream);
  font-family: var(--font-main);
  font-size: 0.93rem;
  padding: 12px 16px;
  outline: none;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
  width: 100%;
  appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238FA3BC' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}
.form-group select option { background: var(--indigo); color: var(--cream); }
.form-group textarea { min-height: 130px; resize: vertical; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: rgba(200,135,74,0.50);
  box-shadow: 0 0 0 3px rgba(200,135,74,0.08);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(143,163,188,0.45); }
.form-submit { width: 100%; justify-content: center; padding: 15px 28px; font-size: 0.95rem; margin-top: 4px; }
.form-note {
  text-align: center;
  margin-top: 14px;
  font-size: 0.78rem;
  color: rgba(143,163,188,0.45);
}

/* Form states */
.form-success {
  display: none;
  text-align: center;
  padding: 32px 24px;
  color: var(--cream);
}
.form-success.visible { display: block; }
.form-success svg { width: 44px; height: 44px; color: var(--amber); margin: 0 auto 16px; }

/* ════════════════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════════════════ */
.footer {
  background: rgba(26,43,74,0.50);
  border-top: 1px solid rgba(78,100,128,0.18);
  padding: 56px 0 36px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 52px;
}
.footer-brand { max-width: 300px; }
.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.footer-brand p {
  font-size: 0.88rem;
  color: var(--light-slate);
  line-height: 1.7;
  margin-bottom: 24px;
}
.footer-col h4 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cream);
  margin-bottom: 18px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a {
  font-size: 0.87rem;
  color: var(--light-slate);
  transition: color 0.2s;
}
.footer-col ul li a:hover { color: var(--amber); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid rgba(78,100,128,0.14);
  flex-wrap: wrap;
  gap: 14px;
}
.footer-bottom p {
  font-size: 0.80rem;
  color: rgba(143,163,188,0.45);
}
.footer-bottom a {
  color: rgba(143,163,188,0.45);
  transition: color 0.2s;
}
.footer-bottom a:hover { color: var(--amber); }

/* ════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid .service-card:nth-child(4) { grid-column: auto; }
  .services-grid .service-card:nth-child(5) { grid-column: auto; }
  .cs-card { grid-template-columns: 1fr; gap: 32px; padding: 40px; }
  .cs-card-number { font-size: 3rem; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --section-pad: 72px; }
  .container { padding: 0 20px; }

  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  .hero-content { padding: 60px 0; }
  .hero-bg-diamond { display: none; }
  .hero-stats { gap: 28px; }

  .services-grid { grid-template-columns: 1fr; }
  .service-card { padding: 32px 28px; }

  .cs-card { padding: 32px 28px; }

  .articles-grid { grid-template-columns: 1fr; }

  .contact-inner { grid-template-columns: 1fr; gap: 48px; }
  .contact-form { padding: 32px 24px; }
  .form-row { grid-template-columns: 1fr; }

  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  h1 { font-size: 2.1rem; }
  .hero-ctas { flex-direction: column; }
  .footer-inner { grid-template-columns: 1fr; }
}