/* ============================================================
   VERMEULEN CONSULTING — styles
   Palette: slate + teal accent, no purple
   ============================================================ */

/* --- Reset & base ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --slate-50:  #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --slate-950: #020617;

  --teal:      #0d9488;
  --teal-dark: #0f766e;
  --teal-light:#99f6e4;

  --text:      var(--slate-800);
  --muted:     var(--slate-500);
  --border:    var(--slate-200);

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 10px;
  --transition: 220ms ease;
  --max-w: 1100px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  color: var(--text);
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* --- Typography ------------------------------------------- */
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 700; line-height: 1.1; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 700; letter-spacing: -0.025em; line-height: 1.2; }
h3 { font-size: 1.1rem; font-weight: 600; letter-spacing: -0.01em; }
h4 { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
p  { color: var(--slate-600); }

/* --- Utility ---------------------------------------------- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal);
  margin-bottom: 0.5rem;
}
.section-label.light { color: var(--teal-light); }

.section-header {
  max-width: 560px;
  margin-bottom: 3.5rem;
}
.section-header h2 { margin-bottom: 0.75rem; }
.section-sub { font-size: 1.05rem; color: var(--slate-500); }

/* --- Buttons ---------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              box-shadow var(--transition), transform var(--transition);
  border: none;
}
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--teal);
  color: #fff;
}
.btn-primary:hover { background: var(--teal-dark); box-shadow: 0 4px 20px rgba(13,148,136,.3); }

.btn-ghost {
  background: transparent;
  color: var(--slate-300);
  border: 1px solid rgba(255,255,255,0.2);
}
.btn-ghost:hover { background: rgba(255,255,255,0.07); color: #fff; border-color: rgba(255,255,255,0.35); }

.btn-full { width: 100%; justify-content: center; }

/* --- Scroll reveal ---------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   NAV
   ============================================================ */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.75rem 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
#nav.scrolled {
  background: rgba(2,6,23,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.07);
  padding: 1.1rem 0;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: 1rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-logo img { border-radius: 5px; flex-shrink: 0; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--slate-300);
  transition: color var(--transition);
}
.nav-links a:hover { color: #fff; }

.nav-cta {
  background: var(--teal) !important;
  color: #fff !important;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius);
}
.nav-cta:hover { background: var(--teal-dark) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* Mobile nav */
@media (max-width: 680px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--slate-950);
    border-top: 1px solid rgba(255,255,255,0.07);
    padding: 1rem 1.5rem 1.5rem;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 0.65rem 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .nav-links a:last-child { border-bottom: none; }
  .nav-cta { margin-top: 0.5rem; text-align: center; }
}

/* ============================================================
   HERO
   ============================================================ */
#hero {
  min-height: 100svh;
  background: var(--slate-950);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 7rem 1.5rem 5rem;
}

/* Subtle grid texture */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* Teal glow */
#hero::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(13,148,136,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  z-index: 1;
  max-width: 750px;
}

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin-bottom: 1.25rem;
}

#hero h1 {
  color: #fff;
  margin-bottom: 1.25rem;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--slate-400);
  max-width: 540px;
  margin-bottom: 2.25rem;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}
.hero-scroll-hint span {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--teal), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 1; }
  50%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ============================================================
   SERVICES
   ============================================================ */
#services {
  padding: 6rem 0;
  background: #fff;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.service-card {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
  border-color: var(--teal);
  box-shadow: 0 4px 24px rgba(13,148,136,0.08);
  transform: translateY(-2px);
}

.service-icon {
  width: 40px;
  height: 40px;
  color: var(--teal);
  margin-bottom: 1.25rem;
}
.service-icon svg { width: 100%; height: 100%; }

.service-card h3 {
  color: var(--slate-800);
  margin-bottom: 0.6rem;
}
.service-card p {
  font-size: 0.95rem;
  line-height: 1.65;
}

@media (max-width: 640px) {
  .services-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   ABOUT
   ============================================================ */
#about {
  padding: 6rem 0;
  background: var(--slate-50);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text h2 { margin-bottom: 1.25rem; }
.about-text p { margin-bottom: 1rem; font-size: 0.975rem; line-height: 1.75; }
.about-text p:last-of-type { margin-bottom: 0; }

.about-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.25rem;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.4;
  display: block;
  max-width: 110px;
}

.about-certs { padding-top: 0.25rem; }
.about-certs .section-label { margin-bottom: 1.25rem; }

.cert-list { display: flex; flex-direction: column; gap: 0; }
.cert-list li {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 0 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}
.cert-list li:first-child { border-top: 1px solid var(--border); }

.cert-org {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--teal);
  grid-column: 1;
  grid-row: 1;
}
.cert-name {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--slate-700);
  grid-column: 1;
  grid-row: 2;
  margin-top: 0.2rem;
}
.cert-year {
  font-size: 0.8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  grid-column: 2;
  grid-row: 1 / 3;
  align-self: center;
}

@media (max-width: 780px) {
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
}

/* ============================================================
   SKILLS
   ============================================================ */
#skills {
  padding: 6rem 0;
  background: #fff;
}

.skills-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem 3rem;
}

.skill-group h4 { margin-bottom: 0.85rem; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--slate-600);
  background: var(--slate-100);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.75rem;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.tag:hover {
  background: rgba(13,148,136,0.08);
  color: var(--teal-dark);
  border-color: rgba(13,148,136,0.3);
}

@media (max-width: 580px) {
  .skills-categories { grid-template-columns: 1fr; }
}

/* ============================================================
   CONTACT
   ============================================================ */
#contact {
  padding: 9rem 0 6rem;
  background: var(--slate-900);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.contact-text h2 {
  color: #fff;
  margin-bottom: 1rem;
}
.contact-text p {
  color: var(--slate-400);
  font-size: 0.975rem;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--slate-400);
  transition: color var(--transition);
}
.contact-link svg { width: 18px; height: 18px; flex-shrink: 0; }
.contact-link:hover { color: var(--teal-light); }

/* Form */
.contact-form {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.form-group label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--slate-300);
}
.optional {
  color: var(--slate-500);
  font-weight: 400;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  font-family: var(--font);
  font-size: 0.9rem;
  color: #fff;
  outline: none;
  transition: border-color var(--transition), background var(--transition);
  width: 100%;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--slate-600); }
.contact-form select { color: var(--slate-400); cursor: pointer; appearance: none; }
.contact-form select option { background: var(--slate-800); color: #fff; }

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--teal);
  background: rgba(13,148,136,0.07);
}

.contact-form textarea { resize: vertical; min-height: 110px; }

.btn-label  { display: block; }
.btn-sending { display: none; }
.contact-form.submitting .btn-label  { display: none; }
.contact-form.submitting .btn-sending { display: block; }
.contact-form.submitting button { opacity: 0.7; pointer-events: none; }

.form-success {
  font-size: 0.875rem;
  color: var(--teal-light);
  min-height: 1.2em;
  text-align: center;
}

@media (max-width: 780px) {
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
}
@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 1.5rem; }
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--slate-950);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 1.75rem 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-logo {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-300);
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--slate-600);
}
.footer-nav {
  display: flex;
  gap: 1.5rem;
}
.footer-nav a {
  font-size: 0.8rem;
  color: var(--slate-500);
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--slate-300); }

@media (max-width: 580px) {
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}