/*
Theme Name: MercuryAI Labs
Theme URI: https://mercuryai.example.com
Author: MercuryAI Labs
Author URI: https://mercuryai.example.com
Description: A distinctive, editable WordPress theme for MercuryAI Labs — an AI-first technology company. Built around a "liquid mercury" visual identity: graphite surfaces, a chrome/cobalt gradient signature, and warm amber accents. Fully editable via the WordPress Customizer (hero copy, colors, logo, menus, contact info) with no code required.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
Tested up to: 6.6
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: mercuryai
Tags: one-column, custom-colors, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready

This theme, like WordPress, is licensed under the GPL.
Use it to make something cool, have fun, and share what you've learned.
*/

/* ==========================================================================
   0. DESIGN TOKENS
   Edit these variables to restyle the entire site. Colors can also be
   changed without code via Appearance -> Customize -> Brand Colors.
   ========================================================================== */

:root {
  /* Core surfaces — deep graphite, not pure black */
  --mai-ink: #0b0d12;
  --mai-graphite: #12151c;
  --mai-graphite-2: #1b202b;
  --mai-graphite-3: #262d3a;
  --mai-border: #262b36;

  /* Text */
  --mai-text: #eef1f5;
  --mai-text-muted: #9aa5b4;
  --mai-text-faint: #626c7c;

  /* Liquid-metal / chrome accent (the "mercury" signature) */
  --mai-chrome-1: #f4f6f8;
  --mai-chrome-2: #c9d3dd;
  --mai-chrome-3: #6b7a90;

  /* Signal — cobalt (primary interactive accent) */
  --mai-cobalt: #4c7eff;
  --mai-cobalt-soft: #8fb0ff;
  --mai-cobalt-dim: rgba(76, 126, 255, 0.14);

  /* Spark — warm accent for calls to action */
  --mai-amber: #ffb74d;
  --mai-amber-dim: rgba(255, 183, 77, 0.16);

  /* Typography */
  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  /* Layout */
  --container-w: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --space-section: clamp(64px, 9vw, 128px);
}

/* ==========================================================================
   1. RESET & BASE
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--mai-ink);
  color: var(--mai-text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.6rem, 5vw, 4.6rem); }
h2 { font-size: clamp(2rem, 3.4vw, 2.9rem); }
h3 { font-size: 1.35rem; }

p { margin: 0 0 1em; color: var(--mai-text-muted); }

button { font-family: inherit; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--mai-cobalt-soft);
  outline-offset: 3px;
  border-radius: 4px;
}

.screen-reader-text {
  position: absolute !important;
  clip: rect(1px, 1px, 1px, 1px);
  width: 1px; height: 1px;
  overflow: hidden;
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mai-cobalt-soft);
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mai-amber);
  box-shadow: 0 0 10px 2px var(--mai-amber-dim);
}

section {
  padding: var(--space-section) 0;
  position: relative;
}

.section-head {
  max-width: 640px;
  margin-bottom: 56px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ==========================================================================
   2. BUTTONS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(120deg, var(--mai-amber), #ffcf85);
  color: #201200;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -10px rgba(255, 183, 77, 0.55);
}

.btn-ghost {
  background: transparent;
  color: var(--mai-text);
  border-color: var(--mai-border);
}

.btn-ghost:hover {
  border-color: var(--mai-cobalt-soft);
  background: var(--mai-cobalt-dim);
}

.btn-arrow {
  transition: transform 0.25s ease;
}
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ==========================================================================
   3. HEADER / NAVIGATION
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 20px 0;
  background: rgba(11, 13, 18, 0.6);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease, padding 0.3s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--mai-border);
  padding: 14px 0;
  background: rgba(11, 13, 18, 0.85);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-branding {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--mai-text);
}

.site-branding img {
  max-height: 34px;
  width: auto;
}

.site-branding-link,
.site-name-link {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: conic-gradient(from 220deg, var(--mai-chrome-1), var(--mai-cobalt), var(--mai-chrome-2), var(--mai-chrome-1));
  flex-shrink: 0;
}

.main-navigation ul {
  display: flex;
  align-items: center;
  gap: 34px;
}

.main-navigation a {
  font-size: 0.95rem;
  color: var(--mai-text-muted);
  transition: color 0.2s ease;
  position: relative;
}

.main-navigation a:hover,
.main-navigation .current-menu-item > a {
  color: var(--mai-text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--mai-border);
  border-radius: 8px;
  width: 42px;
  height: 42px;
  color: var(--mai-text);
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   4. HERO — signature liquid-mercury orb
   ========================================================================== */

.hero {
  padding-top: clamp(56px, 8vw, 104px);
  padding-bottom: clamp(56px, 8vw, 104px);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.hero-copy p.lede {
  font-size: 1.15rem;
  max-width: 480px;
  color: var(--mai-text-muted);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  min-height: 440px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-bottom: 28px;
}

.network-diagram {
  width: 100%;
  max-width: 420px;
  height: auto;
  overflow: visible;
}

.network-diagram .edge {
  fill: none;
  stroke: var(--mai-border);
  stroke-width: 1.4;
}

.network-diagram .pulse {
  filter: drop-shadow(0 0 6px currentColor);
}

.network-diagram .pulse-in {
  fill: var(--mai-cobalt-soft);
  color: var(--mai-cobalt-soft);
}

.network-diagram .pulse-out {
  fill: var(--mai-amber);
  color: var(--mai-amber);
}

.network-diagram .node {
  stroke-width: 1.6;
  stroke: var(--mai-chrome-2);
  animation: node-glow 2.6s ease-in-out infinite;
}

.network-diagram .node-in {
  fill: var(--mai-graphite-2);
  stroke: var(--mai-cobalt-soft);
  animation-delay: 0s;
}

.network-diagram .node-hidden {
  fill: var(--mai-graphite-2);
  stroke: var(--mai-chrome-1);
  animation-delay: 1.05s;
}

.network-diagram .node-out {
  fill: var(--mai-graphite-2);
  stroke: var(--mai-amber);
  animation-delay: 2.2s;
}

.network-labels {
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 6px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mai-text-faint);
}

.network-labels span:last-child { color: var(--mai-amber); opacity: 0.8; }
.network-labels span:first-child { color: var(--mai-cobalt-soft); opacity: 0.8; }

.trust-bar {
  padding: 32px 0 0;
  border-top: 1px solid var(--mai-border);
  margin-top: 56px;
}

.trust-bar .trust-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mai-text-faint);
  margin-bottom: 20px;
}

.trust-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: center;
  opacity: 0.7;
}

.trust-logos span {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--mai-text-muted);
  font-size: 1.05rem;
}

/* ==========================================================================
   5. APPROACH — automate / optimize / accelerate (a real sequence)
   ========================================================================== */

.approach-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--mai-border);
  border: 1px solid var(--mai-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.approach-item {
  background: var(--mai-graphite);
  padding: 40px 34px;
  position: relative;
}

.approach-step {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--mai-cobalt-soft);
  letter-spacing: 0.1em;
  margin-bottom: 22px;
  display: block;
}

.approach-item h3 {
  margin-bottom: 10px;
}

.approach-item p {
  margin: 0;
  font-size: 0.96rem;
}

/* ==========================================================================
   6. CAPABILITY CARDS
   ========================================================================== */

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.capability-card {
  background: var(--mai-graphite);
  border: 1px solid var(--mai-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.capability-card:hover {
  transform: translateY(-4px);
  border-color: var(--mai-cobalt-soft);
  background: var(--mai-graphite-2);
}

.capability-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--mai-cobalt-dim);
  color: var(--mai-cobalt-soft);
  margin-bottom: 22px;
}

.capability-icon svg { width: 22px; height: 22px; }

.capability-card h3 { margin-bottom: 10px; }
.capability-card p { font-size: 0.96rem; margin: 0; }

/* ==========================================================================
   7. ABOUT / MISSION SPLIT
   ========================================================================== */

.about-split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: center;
}

.about-visual {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  border: 1px solid var(--mai-border);
  position: relative;
  overflow: hidden;
  background: var(--mai-graphite);
}

.about-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-visual-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
  background:
    radial-gradient(circle at 30% 20%, rgba(76,126,255,0.35), transparent 55%),
    radial-gradient(circle at 75% 80%, rgba(255,183,77,0.25), transparent 55%),
    var(--mai-graphite);
}

.about-visual-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--mai-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--mai-border) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.4;
}

.brand-mark-lg {
  position: relative;
  z-index: 1;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  margin-bottom: 28px;
  background: conic-gradient(from 220deg, var(--mai-chrome-1), var(--mai-cobalt), var(--mai-chrome-2), var(--mai-chrome-1));
  animation: mark-pulse 4s ease-in-out infinite;
}

.about-visual-quote {
  position: relative;
  z-index: 1;
  max-width: 280px;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.3rem;
  line-height: 1.35;
  color: var(--mai-text);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.about-stat .stat-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--mai-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.about-stat p {
  margin: 6px 0 0;
  font-size: 0.95rem;
}

/* ==========================================================================
   8. SOLUTIONS
   ========================================================================== */

.solutions-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--mai-border);
}

.solution-row {
  display: grid;
  grid-template-columns: 90px 1fr 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 30px 8px;
  border-bottom: 1px solid var(--mai-border);
  transition: background 0.25s ease;
}

.solution-row:hover {
  background: var(--mai-graphite);
}

.solution-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--mai-cobalt-soft);
}

.solution-row h3 { margin: 0; }
.solution-row p { margin: 0; font-size: 0.93rem; }

.solution-row .btn-arrow-link {
  color: var(--mai-text-muted);
  font-size: 1.3rem;
  transition: transform 0.25s ease, color 0.25s ease;
}

.solution-row:hover .btn-arrow-link {
  transform: translateX(4px);
  color: var(--mai-amber);
}

/* ==========================================================================
   9. CTA BANNER
   ========================================================================== */

.cta-banner {
  border-radius: var(--radius-lg);
  padding: 72px 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: var(--mai-graphite);
  border: 1px solid var(--mai-border);
}

.cta-banner::before {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  top: -220px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(76,126,255,0.35), transparent 60%);
  pointer-events: none;
}

.cta-banner h2 {
  max-width: 620px;
  margin: 0 auto 16px;
}

.cta-banner p {
  max-width: 520px;
  margin: 0 auto 32px;
}

.cta-banner .hero-actions { justify-content: center; margin-top: 0; }

/* ==========================================================================
   10. CONTACT
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 26px;
  margin-top: 32px;
}

.contact-info-item .stat-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--mai-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 6px;
}

.contact-info-item a,
.contact-info-item span.value {
  font-size: 1.05rem;
  color: var(--mai-text);
}

.contact-form {
  background: var(--mai-graphite);
  border: 1px solid var(--mai-border);
  border-radius: var(--radius-md);
  padding: 36px;
}

.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 18px;
}

.contact-form label {
  display: block;
  font-size: 0.82rem;
  color: var(--mai-text-faint);
  margin-bottom: 8px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background: var(--mai-ink);
  border: 1px solid var(--mai-border);
  border-radius: var(--radius-sm);
  padding: 13px 14px;
  color: var(--mai-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--mai-cobalt-soft);
  outline: none;
}

.contact-form textarea { min-height: 120px; resize: vertical; }

.contact-form .field-full { margin-bottom: 18px; }

.form-note {
  font-size: 0.82rem;
  color: var(--mai-text-faint);
  margin-top: 14px;
}

/* ==========================================================================
   11. FOOTER
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--mai-border);
  padding: 72px 0 32px;
  margin-top: 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 40px;
  padding-bottom: 56px;
}

.footer-brand .site-branding { margin-bottom: 16px; }
.footer-brand p { max-width: 320px; font-size: 0.92rem; }

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--mai-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.25s ease, color 0.25s ease;
  color: var(--mai-text-muted);
}

.footer-social a:hover {
  border-color: var(--mai-cobalt-soft);
  color: var(--mai-cobalt-soft);
}

.footer-social svg { width: 16px; height: 16px; }

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--mai-text-faint);
  margin-bottom: 20px;
  font-weight: 500;
}

.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a,
.footer-col li { color: var(--mai-text-muted); font-size: 0.94rem; }
.footer-col a:hover { color: var(--mai-text); }

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--mai-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--mai-text-faint);
}

.footer-bottom nav ul { display: flex; gap: 22px; }

/* ==========================================================================
   12. BLOG / SINGLE / PAGE CONTENT
   ========================================================================== */

.page-hero {
  padding: 72px 0 40px;
  border-bottom: 1px solid var(--mai-border);
}

.page-hero h1 { margin-bottom: 14px; }
.page-hero .meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--mai-text-faint);
}

.entry-content,
.page-content {
  max-width: 760px;
  margin: 56px auto 0;
  font-size: 1.05rem;
}

.entry-content h2, .page-content h2 { margin-top: 1.6em; }
.entry-content h3, .page-content h3 { margin-top: 1.4em; }
.entry-content img, .page-content img {
  border-radius: var(--radius-md);
  margin: 28px 0;
}
.entry-content a, .page-content a {
  color: var(--mai-cobalt-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.entry-content blockquote, .page-content blockquote {
  border-left: 3px solid var(--mai-cobalt);
  padding-left: 20px;
  color: var(--mai-text-muted);
  font-style: italic;
  margin: 28px 0;
}
.entry-content code, .page-content code {
  font-family: var(--font-mono);
  background: var(--mai-graphite);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.post-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.post-list article {
  padding-bottom: 40px;
  border-bottom: 1px solid var(--mai-border);
}

.post-list .meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--mai-text-faint);
  margin-bottom: 10px;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 56px;
}

.pagination a, .pagination span {
  padding: 10px 16px;
  border: 1px solid var(--mai-border);
  border-radius: 8px;
  font-size: 0.9rem;
}

.error-404 {
  text-align: center;
  padding: 120px 0;
}

.error-404 .code {
  font-family: var(--font-mono);
  color: var(--mai-cobalt-soft);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
}

/* ==========================================================================
   13. WIDGETS / SEARCH
   ========================================================================== */

.search-form {
  display: flex;
  gap: 10px;
  max-width: 420px;
}

.search-form input[type="search"] {
  flex: 1;
  background: var(--mai-graphite);
  border: 1px solid var(--mai-border);
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--mai-text);
}

.search-form button {
  background: var(--mai-cobalt);
  border: none;
  color: #fff;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 600;
}

/* ==========================================================================
   14. ANIMATIONS
   ========================================================================== */

@keyframes node-glow {
  0%, 100% { filter: drop-shadow(0 0 0 transparent); opacity: 0.85; }
  30% { filter: drop-shadow(0 0 7px currentColor); opacity: 1; }
}

@keyframes mark-pulse {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 0 transparent); }
  50% { transform: scale(1.05); filter: drop-shadow(0 0 20px rgba(76, 126, 255, 0.45)); }
}

.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; }
  .network-diagram .node,
  .brand-mark-lg,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .network-diagram .pulse {
    display: none;
  }
}

/* ==========================================================================
   15. RESPONSIVE
   ========================================================================== */

@media (max-width: 960px) {
  .hero-grid,
  .about-split,
  .contact-grid { grid-template-columns: 1fr; }

  .hero-visual { min-height: 320px; order: -1; }
  .network-diagram { max-width: 300px; }

  .approach-list { grid-template-columns: 1fr; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }

  .solution-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 720px) {
  .main-navigation { display: none; }
  .menu-toggle { display: flex; }
  .header-actions .btn-ghost { display: none; }

  .capability-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 36px; }
  .contact-form .form-row { grid-template-columns: 1fr; }
  .cta-banner { padding: 48px 24px; }
}

/* Mobile nav drawer, toggled via JS with .nav-open on body */
@media (max-width: 720px) {
  body.nav-open .main-navigation {
    display: block;
    position: fixed;
    inset: 0;
    top: 74px;
    background: var(--mai-ink);
    padding: 40px 28px;
    z-index: 99;
  }
  body.nav-open .main-navigation ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 26px;
  }
  body.nav-open .main-navigation a { font-size: 1.3rem; }
}