:root {
  color-scheme: light;
  --bg: #f8f9fb;
  --card: #ffffff;
  --card-border: #e2e4e9;
  --text: #1a1d24;
  --muted: #5e6472;
  --accent: #1e3a5f;
  --accent-strong: #16304d;
  --accent-soft: #e8edf3;
  --accent-fill: #1e3a5f;
  --accent-fill-hover: #16304d;
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.05);
  --shadow-hover: 0 18px 40px rgba(15, 23, 42, 0.1);
  --radius: 1rem;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #14161b;
  --card: #1c1f26;
  --card-border: #2b2f38;
  --text: #e8e9ec;
  --muted: #9a9fab;
  --accent: #7a9cc4;
  --accent-strong: #9db8d6;
  --accent-soft: rgba(122, 156, 196, 0.14);
  --accent-fill: #35547c;
  --accent-fill-hover: #40638f;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 18px 44px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background 0.25s ease, color 0.25s ease;
}

svg {
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent-fill);
  color: white;
  padding: 0.6rem 1rem;
  border-radius: 0 0 0.5rem 0;
  z-index: 200;
}

.skip-link:focus {
  left: 0;
}

/* Navbar */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--card) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
}

.navbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 0.6rem;
  background: var(--accent-fill);
  color: white;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  color: var(--accent) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  display: block;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}

.theme-toggle .icon-moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: inline-flex;
}

/* Hero */

.hero {
  position: relative;
  overflow: hidden;
  padding: 5rem 1.5rem 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 50% at 20% 0%, var(--accent-soft), transparent 70%),
    radial-gradient(50% 40% at 90% 10%, var(--accent-soft), transparent 70%);
  z-index: -1;
}

.hero-content {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin: 0 0 0.75rem;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.5vw, 3.1rem);
  line-height: 1.15;
  margin: 0 0 1.1rem;
  font-weight: 800;
}

.intro {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0 auto 2rem;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  border-radius: 0.7rem;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--accent-fill);
  color: white;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  background: var(--accent-fill-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-lg {
  padding: 1rem 1.8rem;
  font-size: 1.05rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  max-width: 760px;
  margin: 0 auto;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.2rem 1rem;
  box-shadow: var(--shadow);
}

.stat-value {
  display: block;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--accent-strong);
  margin-bottom: 0.3rem;
}

.stat-label {
  color: var(--muted);
  font-size: 0.85rem;
}

/* Sections */

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-alt {
  background: var(--accent-soft);
  max-width: none;
  border-radius: 0;
}

.section-alt > * {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.section h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin: 0 0 0.5rem;
  text-align: center;
}

.section-sub {
  color: var(--muted);
  text-align: center;
  max-width: 560px;
  margin: 0 auto 2.5rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.3rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.6rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 0.7rem;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 1rem;
}

.card-icon svg {
  width: 1.3em;
  height: 1.3em;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.card p {
  color: var(--muted);
  margin: 0;
  font-size: 0.95rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.step {
  text-align: center;
  padding: 1rem;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: var(--accent-fill);
  color: white;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.step p {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0;
}

.portfolio-cta {
  display: flex;
  justify-content: center;
}

.contact-section {
  text-align: center;
}

/* Footer */

.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--card-border);
}

/* Responsive nav */

@media (max-width: 760px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card);
    border-bottom: 1px solid var(--card-border);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem;
    gap: 1rem;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }
}