/* ── Variables ── */
:root {
  --navy:      #1a2b4a;
  --slate:     #4a7fa5;
  --slate-light: #6a9fc5;
  --bg:        #f4f6f8;
  --bg-white:  #ffffff;
  --text:      #2d3748;
  --text-light:#64748b;
  --border:    #e2e8f0;
  --max-w:     1100px;
  --radius:    6px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg-white);
}
img { max-width: 100%; display: block; }
a { color: var(--slate); text-decoration: none; }
a:hover { color: var(--navy); }

/* ── Typography ── */
h1, h2, h3 {
  font-family: 'Playfair Display', serif;
  color: var(--navy);
  line-height: 1.25;
}
h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 600; }
p  { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* ── Layout helpers ── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }
.section    { padding: 5rem 0; }
.section-alt { background: var(--bg); }

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: .8rem 2rem;
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
  transition: background .2s, color .2s, transform .1s;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--slate);
  color: #fff;
  border-color: var(--slate);
}
.btn-primary:hover {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}
.btn-outline:hover {
  background: var(--navy);
  color: #fff;
  transform: translateY(-1px);
}
.btn-white {
  background: #fff;
  color: var(--navy);
  border-color: #fff;
}
.btn-white:hover {
  background: var(--bg);
  border-color: var(--bg);
  color: var(--navy);
}

/* ── Nav ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: .01em;
}
.nav-logo span { color: var(--slate); }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a {
  color: var(--text);
  font-size: .9rem;
  font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover { color: var(--slate); }

/* ── Hero ── */
.hero {
  background: var(--navy);
  color: #fff;
  padding: 6rem 0 5rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(74,127,165,.25) 0%, transparent 65%);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 760px; }
.hero-eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--slate-light);
  margin-bottom: 1.25rem;
}
.hero h1 { color: #fff; margin-bottom: 1.25rem; }
.hero h1 em { color: var(--slate-light); font-style: normal; }
.hero-sub {
  font-size: 1.15rem;
  color: rgba(255,255,255,.8);
  max-width: 580px;
  margin-bottom: 2.25rem;
  line-height: 1.65;
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ── Stakes ── */
.stakes { padding: 4.5rem 0; background: var(--bg); }
.stakes-inner { max-width: 720px; }
.stakes h2 { margin-bottom: 1.25rem; }
.stakes p { font-size: 1.05rem; color: var(--text); }

/* ── Services ── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
  margin-top: 3rem;
}
.service-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: box-shadow .2s, transform .2s;
}
.service-card:hover {
  box-shadow: 0 8px 24px rgba(26,43,74,.08);
  transform: translateY(-2px);
}
.service-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: rgba(74,127,165,.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
}
.service-icon svg { width: 22px; height: 22px; stroke: var(--slate); fill: none; stroke-width: 1.75; }
.service-card h3 { margin-bottom: .6rem; }
.service-card p  { font-size: .95rem; color: var(--text-light); margin: 0; }

/* ── Who It's For ── */
.for-section { background: var(--bg); }
.for-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}
.for-item {
  background: var(--bg-white);
  border-left: 3px solid var(--slate);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.25rem 1.5rem;
}
.for-item h3 { font-size: 1rem; margin-bottom: .3rem; }
.for-item p  { font-size: .88rem; color: var(--text-light); margin: 0; }

/* ── Why DersCo ── */
.why-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.why-text h2 { margin-bottom: 1.25rem; }
.why-text p  { color: var(--text); font-size: 1rem; }
.credentials { display: flex; flex-direction: column; gap: 1rem; }
.credential {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--slate);
}
.credential h3 { font-size: .95rem; margin-bottom: .2rem; color: var(--navy); }
.credential p  { font-size: .88rem; color: var(--text-light); margin: 0; }

/* ── CTA Band ── */
.cta-band {
  background: var(--navy);
  color: #fff;
  padding: 5rem 0;
  text-align: center;
}
.cta-band h2 { color: #fff; margin-bottom: 1rem; }
.cta-band p  { color: rgba(255,255,255,.8); font-size: 1.05rem; margin-bottom: 2rem; max-width: 520px; margin-left: auto; margin-right: auto; }

/* ── Contact ── */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: start;
}
.contact-info h2 { margin-bottom: 1rem; }
.contact-info p  { color: var(--text); font-size: 1rem; }
.contact-info a  { color: var(--slate); }
.contact-info .book-cta { margin-top: 1.5rem; }

form { display: flex; flex-direction: column; gap: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
label { font-size: .85rem; font-weight: 600; color: var(--navy); display: block; margin-bottom: .3rem; }
input, select, textarea {
  width: 100%;
  padding: .7rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: .95rem;
  color: var(--text);
  background: var(--bg-white);
  transition: border-color .2s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--slate);
}
textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: .8rem; color: var(--text-light); }

/* ── Footer ── */
footer {
  background: var(--navy);
  color: rgba(255,255,255,.6);
  padding: 2.5rem 0;
  font-size: .85rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-logo {
  font-family: 'Playfair Display', serif;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
}
.footer-logo span { color: var(--slate-light); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: rgba(255,255,255,.6); transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-legal { width: 100%; text-align: center; margin-top: .5rem; font-size: .78rem; }

/* ── Responsive ── */
@media (max-width: 768px) {
  nav { padding: .75rem 0; }
  .nav-inner { flex-wrap: wrap; justify-content: center; gap: .35rem 1rem; }
  .nav-links { flex-wrap: wrap; justify-content: center; gap: .4rem 1.25rem; }
  .nav-links a { font-size: .85rem; white-space: nowrap; }
  .nav-links .btn { display: none; }
  .why-inner      { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-inner  { grid-template-columns: 1fr; gap: 2rem; }
  .form-row       { grid-template-columns: 1fr; }
  .footer-inner   { flex-direction: column; text-align: center; }
  .footer-links   { justify-content: center; flex-wrap: wrap; }
  .hero-cta .btn-outline { display: none; }
}
@media (max-width: 480px) {
  .section { padding: 3.5rem 0; }
  .for-grid { grid-template-columns: 1fr; }
  .nav-links a:not(.btn) { font-size: .82rem; }
}