/* ============================================================
   Stephane Belliveau — styles.css
   Theme: minimalist black/white, dark mode default
   Dark/light toggled via [data-theme="dark"] on <html>
   ============================================================ */

/* ── Theme Variables ────────────────────────────────────── */
:root,
[data-theme="dark"] {
  --bg:           #0a0a0a;
  --bg-surface:   #111111;
  --bg-raised:    #1a1a1a;
  --border:       #2a2a2a;
  --border-mid:   #333333;
  --text:         #f0f0f0;
  --text-muted:   #b0b0b0;
  --text-subtle:  #888888;
  --accent:       #ffffff;
  --accent-inv:   #000000;
  --hero-bg:      #000000;
  --hero-text:    #ffffff;
  --hero-sub:     #bbbbbb;
  --btn-primary-bg:    #ffffff;
  --btn-primary-text:  #000000;
  --btn-primary-hover: #e0e0e0;
  --btn-secondary-border: #777777;
  --btn-secondary-text:   #eeeeee;
  --btn-secondary-hover-bg:   #ffffff;
  --btn-secondary-hover-text: #000000;
  --nav-bg:       #000000;
  --nav-text:     #cccccc;
  --nav-hover:    #ffffff;
  --nav-border:   #1f1f1f;
  --footer-bg:    #000000;
  --footer-text:  #999999;
  --footer-link:  #cccccc;
  --card-bg:      #111111;
  --card-border:  #222222;
  --card-hover-shadow: 0 4px 20px rgba(255,255,255,0.06);
  --input-bg:     #111111;
  --input-border: #333333;
  --input-focus:  #ffffff;
  --demo-bg:      #0a0a0a;
  --demo-grid:    rgba(255,255,255,0.04);
  --demo-axis:    #555555;
  --demo-label:   #b0b0b0;
  --demo-btn-border: #555555;
  --btn-highlight: #777777;
  --service-icon-shadow: 0 12px 22px rgba(0,0,0,0.42);
  --service-icon-shadow-hover: 0 16px 28px rgba(0,0,0,0.5);
}

[data-theme="light"] {
  --bg:           #ffffff;
  --bg-surface:   #fafafa;
  --bg-raised:    #f4f4f4;
  --border:       #e5e5e5;
  --border-mid:   #d0d0d0;
  --text:         #0a0a0a;
  --text-muted:   #444444;
  --text-subtle:  #666666;
  --accent:       #000000;
  --accent-inv:   #ffffff;
  --hero-bg:      #0a0a0a;
  --hero-text:    #ffffff;
  --hero-sub:     #cccccc;
  --btn-primary-bg:    #000000;
  --btn-primary-text:  #ffffff;
  --btn-primary-hover: #333333;
  --btn-secondary-border: #cccccc;
  --btn-secondary-text:   #333333;
  --btn-secondary-hover-bg:   #000000;
  --btn-secondary-hover-text: #ffffff;
  --nav-bg:       #ffffff;
  --nav-text:     #333333;
  --nav-hover:    #000000;
  --nav-border:   #eeeeee;
  --footer-bg:    #0a0a0a;
  --footer-text:  #aaaaaa;
  --footer-link:  #cccccc;
  --card-bg:      #ffffff;
  --card-border:  #e5e5e5;
  --card-hover-shadow: 0 4px 20px rgba(0,0,0,0.08);
  --input-bg:     #ffffff;
  --input-border: #d0d0d0;
  --input-focus:  #000000;
  --demo-bg:      #ffffff;
  --demo-grid:    rgba(0,0,0,0.04);
  --demo-axis:    #999999;
  --demo-label:   #555555;
  --demo-btn-border: #c0c0c0;
  --btn-highlight: #aaaaaa;
  --service-icon-shadow: 0 12px 20px rgba(17,17,17,0.14);
  --service-icon-shadow-hover: 0 16px 28px rgba(17,17,17,0.22);
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 1rem;
  transition: background 0.2s, color 0.2s;
}
img { max-width: 100%; display: block; }
a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; }
a:hover { opacity: 0.7; }
ul, ol { list-style: none; }

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: 0.5rem;
  transform: translateY(-150%);
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border: 1px solid var(--btn-primary-bg);
  border-radius: 4px;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1;
  padding: 0.55rem 0.8rem;
  text-decoration: none;
  z-index: 1000;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
.lang-toggle:focus-visible,
.theme-toggle:focus-visible,
.nav-toggle:focus-visible,
.btn:focus-visible,
.demo-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Utilities ─────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}
.hidden { display: none !important; }
.center-image {
  margin-inline: auto;
}
.required { color: #888; margin-left: 2px; }

/* ── Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.6rem 1.35rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s, opacity 0.15s, box-shadow 0.15s;
  border: 1px solid transparent;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.btn:hover,
.demo-btn:hover,
.nav-cta:hover,
.btn-linkedin:hover,
.lang-toggle:hover,
.theme-toggle:hover {
  box-shadow: 0 0 0 2px var(--btn-highlight);
  opacity: 1;
  text-decoration: none;
}

.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border-color: var(--btn-primary-bg);
}

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

.btn-demo {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border-mid);
  font-size: 0.82rem;
  padding: 0.4rem 0.9rem;
  margin-top: 1rem;
}

/* Demo page action buttons — clean minimalist style */
.demo-btn {
  display: inline-block;
  padding: 0.38rem 0.9rem;
  border: 1px solid var(--demo-btn-border);
  border-radius: 3px;
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s;
  line-height: 1.4;
}
.demo-btn.active,
.demo-btn[style*="opacity: 1"],
.demo-btn[style*="opacity:1"] {
  border-color: var(--text-muted);
  color: var(--text);
}

.btn-linkedin {
  background: #0a66c2;
  color: #fff;
  border-color: #0a66c2;
}

/* ── Header ────────────────────────────────────────────── */
.site-header {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.65rem;
  gap: 1rem;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--nav-hover);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}
.site-logo:hover { opacity: 0.8; }
.logo-img {
  display: block;
  height: 34px;
  width: auto;
  transition: transform 0.18s ease;
}
.site-logo:hover .logo-img,
.site-logo:focus-visible .logo-img {
  transform: translateY(-1px);
}
.logo-text { color: var(--nav-hover); }

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Language toggle */
.lang-toggle {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--nav-text);
  border: 1px solid var(--border-mid);
  padding: 0.3rem 0.65rem;
  border-radius: 3px;
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: color 0.15s, border-color 0.15s, box-shadow 0.15s;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-mid);
  color: var(--nav-text);
  cursor: pointer;
  padding: 0.3rem 0.6rem;
  border-radius: 3px;
  font-size: 0.9rem;
  line-height: 1;
  transition: color 0.15s, border-color 0.15s, box-shadow 0.15s;
  display: flex;
  gap: 0.1rem;
  align-items: center;
}

/* Show/hide correct icon per theme */
[data-theme="dark"]  .theme-icon--light  { display: none; }
[data-theme="dark"]  .theme-icon--dark   { display: inline; }
[data-theme="light"] .theme-icon--dark   { display: none; }
[data-theme="light"] .theme-icon--light  { display: inline; }

.primary-nav { margin-left: auto; }
.primary-nav ul {
  display: flex;
  gap: 0.1rem;
  align-items: center;
}
.primary-nav a {
  color: var(--nav-text);
  padding: 0.4rem 0.7rem;
  border-radius: 3px;
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s, background 0.15s;
}
.primary-nav a:hover,
.primary-nav a[aria-current="page"] { color: var(--nav-hover); background: var(--bg-raised); }
.nav-cta {
  background: var(--btn-primary-bg) !important;
  color: var(--btn-primary-text) !important;
  margin-left: 0.35rem;
  transition: color 0.15s, background 0.15s, box-shadow 0.15s;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--border-mid);
  cursor: pointer;
  padding: 0.4rem 0.5rem;
  border-radius: 3px;
}
.nav-toggle span { display: block; width: 20px; height: 1.5px; background: var(--nav-text); border-radius: 1px; }

/* ── Hero ──────────────────────────────────────────────── */
.hero {
  background: var(--hero-bg);
  color: var(--hero-text);
  padding: 5.5rem 0 4.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.hero-headline {
  font-size: clamp(1.6rem, 3.2vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  max-width: 800px;
  margin-inline: auto;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--hero-text);
}
.hero-subheadline {
  font-size: 1rem;
  color: var(--hero-sub);
  max-width: 620px;
  margin-inline: auto;
  margin-bottom: 2.25rem;
  line-height: 1.7;
  font-weight: 400;
}
.hero-actions { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }

/* Hero secondary button always needs to contrast against dark hero bg */
.hero .btn-primary,
.hero .btn-secondary {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
}

/* ── Section Shared ────────────────────────────────────── */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  letter-spacing: -0.02em;
}
.section-subtitle { color: var(--text-muted); margin-bottom: 2.5rem; font-size: 0.95rem; }

/* ── Services ──────────────────────────────────────────── */
.services { padding: 4.5rem 0; border-bottom: 1px solid var(--border); }
.service-groups {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}
.service-group {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.service-group-header {
  width: 100%;
  max-width: none;
}
.service-group-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.45rem;
}
.service-group-description {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}
.service-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
.service-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 6px;
  padding: 1.75rem;
  transition: box-shadow 0.2s, border-color 0.2s;
  display: flex;
  flex-direction: column;
}
.service-card:hover { box-shadow: var(--card-hover-shadow); border-color: var(--border-mid); }
.service-card-link {
  display: inline-flex;
  align-self: flex-start;
  text-decoration: none;
  border-radius: 8px;
}
.service-card-link:hover { opacity: 1; }

/* ── Service Card Icons — geometric poster tiles ─────────── */
.service-card-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 1.1rem;
  flex-shrink: 0;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100% 100%;
  box-shadow: var(--service-icon-shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.service-card:hover .service-card-icon,
.service-card-link:hover .service-card-icon,
.service-card-link:focus-visible .service-card-icon {
  transform: translateY(-2px);
  box-shadow: var(--service-icon-shadow-hover);
}

.service-card-icon--monitor {
  background-image: url("/assets/images/service-icons/monitor.svg");
}

.service-card-icon--code {
  background-image: url("/assets/images/service-icons/code.svg");
}

.service-card-icon--chart {
  background-image: url("/assets/images/service-icons/chart.svg");
}

.service-card-icon--topology {
  background-image: url("/assets/images/service-icons/topology.svg");
}

.service-card-icon--transform {
  background-image: url("/assets/images/service-icons/transform.svg");
}

.service-card-icon--backup {
  background-image: url("/assets/images/service-icons/backup.svg");
}

.service-card-icon--reconcile {
  background-image: url("/assets/images/service-icons/reconcile.svg");
}

.service-card-icon--api {
  background-image: url("/assets/images/service-icons/api.svg");
}

.service-card-icon--gantt {
  background-image: url("/assets/images/service-icons/gantt.svg");
}

.service-card-icon--health {
  background-image: url("/assets/images/service-icons/health.svg");
}
.service-card-title { font-size: 1rem; font-weight: 700; margin-bottom: 0.65rem; letter-spacing: -0.01em; }
.service-card-title-link {
  color: var(--text);
  text-decoration: none;
}
.service-card-title-link:hover {
  opacity: 1;
  text-decoration: underline;
}
.service-card-description { color: var(--text-muted); font-size: 0.88rem; line-height: 1.65; flex: 1; }

/* ── Recent Posts ──────────────────────────────────────── */
.recent-posts { padding: 4.5rem 0; border-bottom: 1px solid var(--border); }
.post-list { display: flex; flex-direction: column; gap: 1rem; }
.post-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 6px;
  padding: 1.35rem 1.5rem;
}
.post-card-date {
  display: block; font-size: 0.75rem; color: var(--text-subtle);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.35rem;
}
.post-card-title { font-size: 1rem; font-weight: 600; margin-bottom: 0.4rem; }
.post-card-title a { color: var(--text); text-decoration: none; }
.post-card-title a:hover { opacity: 0.7; }
.post-card-excerpt { color: var(--text-muted); font-size: 0.88rem; }
.no-posts { color: var(--text-muted); font-size: 0.9rem; }

/* ── CTA Banner ─────────────────────────────────────────── */
.cta-banner {
  background: var(--hero-bg);
  color: var(--hero-text);
  padding: 4.5rem 0;
  text-align: center;
  border-top: 1px solid var(--border);
}
.cta-banner h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.65rem; letter-spacing: -0.02em; }
.cta-banner p { color: var(--hero-sub); margin-bottom: 1.75rem; font-size: 0.95rem; }

/* ── Page Hero ─────────────────────────────────────────── */
.page-hero {
  background: var(--hero-bg);
  color: var(--hero-text);
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; margin-bottom: 0.4rem; letter-spacing: -0.02em; }
.page-hero-sub { color: var(--hero-sub); font-size: 0.95rem; }

/* ── About ──────────────────────────────────────────────── */
.about-content { padding: 4rem 0; }
.about-grid { display: grid; grid-template-columns: 1fr 300px; gap: 3rem; align-items: start; }
.about-bio h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 0.2rem; letter-spacing: -0.02em; }
.about-credential { color: var(--text-muted); font-size: 0.82rem; margin-bottom: 1.5rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }
.about-bio p { margin-bottom: 1.1rem; line-height: 1.75; color: var(--text); font-size: 0.95rem; }
.about-links { display: flex; gap: 0.65rem; flex-wrap: wrap; margin-top: 1.75rem; }
.about-highlights { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 6px; padding: 1.5rem; }
.about-highlights h3 {
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-subtle); margin-bottom: 0.65rem; margin-top: 1.25rem;
}
.about-highlights h3:first-child { margin-top: 0; }
.expertise-list li { font-size: 0.85rem; padding: 0.3rem 0; border-bottom: 1px solid var(--border); color: var(--text-muted); }
.expertise-list li:last-child { border-bottom: none; }

/* ── Blog ───────────────────────────────────────────────── */
.blog-listing { padding: 4rem 0; }
.post-list-item { border-bottom: 1px solid var(--border); padding-bottom: 2rem; margin-bottom: 2rem; }
.post-list-item:last-child { border-bottom: none; }
.post-read-more { font-size: 0.85rem; font-weight: 600; margin-top: 0.5rem; display: inline-block; text-decoration: none; color: var(--text-muted); }
.post-read-more:hover { color: var(--text); opacity: 1; }

/* ── Single Post ────────────────────────────────────────── */
.post-header { background: var(--hero-bg); color: var(--hero-text); padding: 3rem 0 2.5rem; border-bottom: 1px solid var(--border); }
.post-date { display: block; font-size: 0.75rem; color: var(--text-subtle); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.5rem; }
.post-title { font-size: clamp(1.4rem, 2.8vw, 2rem); font-weight: 700; letter-spacing: -0.02em; }
.post-description { color: var(--hero-sub); font-size: 0.95rem; margin-top: 0.5rem; }
.post-body { padding: 3rem 0; max-width: 720px; }
.post-body h2 { font-size: 1.3rem; margin: 2rem 0 0.65rem; font-weight: 700; letter-spacing: -0.01em; }
.post-body h3 { font-size: 1.05rem; margin: 1.5rem 0 0.5rem; font-weight: 600; }
.post-body p { margin-bottom: 1rem; line-height: 1.8; font-size: 0.95rem; color: var(--text); }
.post-media { margin: 0 0 1.5rem; }
.post-media img {
  margin-inline: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.post-body ul, .post-body ol { padding-left: 1.5rem; margin-bottom: 1rem; list-style: disc; }
.post-body ol { list-style: decimal; }
.post-body li { margin-bottom: 0.4rem; line-height: 1.7; font-size: 0.95rem; }
.post-body code { font-family: 'Courier New', monospace; background: var(--bg-raised); border: 1px solid var(--border); padding: 0.1em 0.35em; border-radius: 3px; font-size: 0.85em; }
.post-body pre { background: var(--bg-raised); border: 1px solid var(--border); padding: 1.25rem; border-radius: 6px; overflow-x: auto; margin-bottom: 1.5rem; }
.post-body pre code { background: none; border: none; padding: 0; font-size: 0.88rem; }
.post-footer { padding-bottom: 3rem; }

/* ── Contact ────────────────────────────────────────────── */
.contact-section { padding: 4rem 0; }
.contact-grid { display: grid; grid-template-columns: 1fr 280px; gap: 3rem; align-items: start; }
.contact-form { display: flex; flex-direction: column; gap: 1.1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.form-group label { font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); }
.form-group input, .form-group textarea {
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.9rem;
  background: var(--input-bg);
  color: var(--text);
  transition: border-color 0.15s;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--input-focus); }
.form-group textarea { resize: vertical; min-height: 130px; }
.contact-recaptcha { min-height: 78px; }
.form-disclosure {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 42rem;
}
.form-disclosure a { color: var(--text); }
.btn-submit { align-self: flex-start; }
.contact-info h2 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.65rem; letter-spacing: -0.01em; }
.contact-info > p { color: var(--text-muted); font-size: 0.88rem; margin-bottom: 1.5rem; }
.contact-details { display: flex; flex-direction: column; gap: 1rem; }
.contact-details li { display: flex; flex-direction: column; gap: 0.2rem; }
.contact-detail-label { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-subtle); }
.contact-response-note { margin-top: 1.5rem; font-size: 0.82rem; color: var(--text-subtle); }

/* ── Thank You ──────────────────────────────────────────── */
.thank-you-section { padding: 4rem 0; }
.thank-you-content { max-width: 480px; }
.thank-you-content p { margin-bottom: 1.5rem; font-size: 0.95rem; color: var(--text-muted); }

/* ── Privacy ────────────────────────────────────────────── */
.privacy-content { padding: 4rem 0; }
.privacy-content .container { max-width: 780px; }
.privacy-content h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 2rem 0 0.65rem;
  letter-spacing: -0.01em;
}
.privacy-content p,
.privacy-content li {
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.75;
}
.privacy-content p { margin-bottom: 1rem; }
.privacy-content ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

/* ── Demo Pages ─────────────────────────────────────────── */
.demo-page { padding: 3rem 0 4rem; }
.demo-page .container { max-width: 1000px; }
.demo-intro { color: var(--text-muted); font-size: 0.92rem; max-width: none; margin-bottom: 2.5rem; line-height: 1.7; }
.demo-chart-wrapper {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 6px;
  padding: 1.5rem;
  overflow: hidden;
}
.demo-controls {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.demo-controls .btn { font-size: 0.82rem; padding: 0.35rem 0.85rem; }
.demo-legend {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.demo-legend-item { display: flex; align-items: center; gap: 0.4rem; font-size: 0.78rem; color: var(--text-muted); }
.demo-legend-swatch { width: 24px; height: 2px; border-radius: 1px; }
.demo-tooltip {
  position: fixed;
  background: var(--bg-raised);
  border: 1px solid var(--border-mid);
  border-radius: 5px;
  padding: 0.6rem 0.9rem;
  font-size: 0.78rem;
  color: var(--text);
  pointer-events: none;
  z-index: 200;
  max-width: 200px;
  line-height: 1.6;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.demo-tooltip strong { display: block; margin-bottom: 0.25rem; font-size: 0.8rem; }

/* ── Footer ─────────────────────────────────────────────── */
.site-footer { background: var(--footer-bg); border-top: 1px solid var(--border); padding-top: 2.5rem; }
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.footer-title { display: block; font-size: 0.95rem; font-weight: 700; color: var(--footer-link); margin-bottom: 0.35rem; }
.footer-tagline { font-size: 0.78rem; color: var(--footer-text); max-width: 280px; line-height: 1.5; }
.footer-nav ul { display: flex; flex-direction: column; gap: 0.35rem; }
.footer-nav a, .footer-links a { color: var(--footer-link); font-size: 0.82rem; text-decoration: none; }
.footer-nav a:hover, .footer-links a:hover { color: #fff; opacity: 1; }
.footer-connect-label { font-size: 0.65rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--footer-text); margin-bottom: 0.5rem; }
.footer-links { display: flex; flex-direction: column; gap: 0.35rem; }
.footer-bottom { padding: 0.85rem 0; }
.footer-bottom p { font-size: 0.75rem; color: var(--footer-text); text-align: center; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .primary-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--nav-border);
    padding: 0.75rem 1.25rem 1rem;
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; gap: 0.15rem; }
  .nav-cta { margin-left: 0; }

  .hero { padding: 3.5rem 0 3rem; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .about-highlights { order: -1; }
  .footer-inner { grid-template-columns: 1fr; gap: 1.5rem; }

  /* Demo page: tighter padding */
  .demo-page { padding: 2rem 0 3rem; }
  .demo-page .container { max-width: 100%; }
  .demo-intro { font-size: 0.86rem; margin-bottom: 1.5rem; }

  /* Demo chart containers & SVGs: allow smaller heights on mobile */
  [id^="chart-"] { min-height: auto !important; max-height: none; }
  [id^="chart-"] svg { min-height: 300px !important; }

  /* Demo charts: allow horizontal scroll for wide SVGs */
  .demo-chart-wrapper,
  [id^="chart-"] {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Demo buttons: allow wrapping, smaller text */
  .demo-btn { font-size: 0.76rem; padding: 0.32rem 0.65rem; }

  /* Demo tooltip: narrower, keep on screen */
  .demo-tooltip { max-width: 170px; font-size: 0.72rem; }
  .demo-tooltip strong { font-size: 0.74rem; }

  /* Demo legend: tighter spacing */
  .demo-legend { gap: 0.75rem; }
  .demo-legend-item { font-size: 0.72rem; }

  /* Page hero: tighter */
  .page-hero { padding: 2rem 0 1.5rem; }
  .page-hero h1 { font-size: 1.3rem; }
}

@media (max-width: 820px) {
  .service-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 820px) and (orientation: landscape) and (max-height: 500px) {
  .service-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
  }
  .service-card { padding: 1.25rem; }
  .service-card-title { font-size: 0.92rem; }
  .service-card-description { font-size: 0.82rem; }
  .btn-demo { font-size: 0.76rem; padding: 0.35rem 0.7rem; }
}

@media (max-width: 620px) {
  .service-cards { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  /* Header: shrink logo text and tighten controls gap on narrow screens */
  .logo-text { font-size: 0.88rem; }
  .header-controls { gap: 0.35rem; }

  .hero-headline { font-size: 1.5rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .about-links { flex-direction: column; }
  .btn-submit { width: 100%; text-align: center; }
  .demo-controls { flex-direction: column; align-items: flex-start; }

  /* Container: reduce side padding on very small screens */
  .container { padding-inline: 0.75rem; }

  /* Service cards: reduce card padding */
  .service-card { padding: 1.25rem; }
  .service-card-title { font-size: 0.92rem; }
  .service-card-description { font-size: 0.82rem; }
  .btn-demo { font-size: 0.76rem; padding: 0.35rem 0.7rem; }

  /* Demo page: further reduce */
  .demo-page .container { padding-inline: 0.5rem; }

  /* Demo chart containers: ensure scroll for wide SVGs on small screens */
  [id^="chart-"] {
    overflow-x: auto;
  }

  /* Demo buttons: stack fully and allow auto-margin reset */
  .demo-btn { font-size: 0.74rem; padding: 0.3rem 0.6rem; }
  [id$="-controls"] span[id$="-status"],
  [id$="-controls"] span[style*="margin-left:auto"] {
    margin-left: 0 !important;
    width: 100%;
  }

  /* Demo tooltip: prevent edge clipping */
  .demo-tooltip { max-width: 150px; font-size: 0.7rem; }

  /* Node info overlay panels: don't overflow container */
  [id$="-node-info"] {
    min-width: 0 !important;
    max-width: calc(100% - 24px) !important;
    font-size: 0.76rem !important;
    right: 6px !important;
    top: 6px !important;
    padding: 0.5rem 0.75rem !important;
  }

  /* Detail panels: scroll horizontally */
  [id$="-detail"], [id$="-detail-panel"], [id$="-detail-body"] {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    font-size: 0.78rem;
  }
}
