/* ── Custom properties ── */
:root {
  --bg:           #0d1117;
  --bg-alt:       #010409;
  --surface:      #161b22;
  --surface-2:    #21262d;
  --border:       #30363d;
  --accent:       #4b8fef;
  --accent-hover: #74aeff;
  --accent-pink:  #d4168c;
  --gradient:     linear-gradient(120deg, #d4168c, #4b8fef);
  --text:         #e6edf3;
  --text-muted:   #8b949e;
  --radius:       10px;
  --shadow:       0 4px 24px rgba(0, 0, 0, .5);
  --transition:   0.2s ease;
  --nav-h:        64px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

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

ul { list-style: none; }

/* ── Utilities ── */
.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.accent { color: var(--accent); }

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section {
  padding-block: 6rem;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  border: 1.5px solid var(--border);
  color: var(--text);
  background: transparent;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

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

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.btn-accent {
  background: var(--accent-pink);
  border-color: var(--accent-pink);
  color: #fff;
}

.btn-accent:hover {
  background: #e83da5;
  border-color: #e83da5;
  color: #fff;
}

.btn-full { width: 100%; }

/* ── Header / Nav ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: opacity var(--transition);
}

.nav-logo:hover { opacity: 0.8; }

.logo-img {
  height: 40px;
  width: auto;
  display: block;
}

.logo-img--footer {
  height: 36px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* Mobile nav open */
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Disable backdrop-filter when nav is open so the fixed overlay escapes the stacking context */
body.nav-open .site-header {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: var(--bg);
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* Subtle dot-grid background */
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.4;
  pointer-events: none;
}

/* Glow overlay */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 40%, rgba(75, 143, 239, 0.07), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-block: 5rem;
  max-width: 720px;
}

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero-headline {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
  line-height: 1.75;
}

/* ── About ── */
.about { background: var(--bg-alt); }

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

.about-text h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 1.25rem;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* Terminal widget */
.terminal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.terminal-bar {
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.terminal-bar span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border);
}

.terminal-bar span:nth-child(1) { background: #ff5f57; }
.terminal-bar span:nth-child(2) { background: #febc2e; }
.terminal-bar span:nth-child(3) { background: #28c840; }

.terminal-body {
  padding: 1.5rem;
  font-family: 'Menlo', 'Consolas', 'Monaco', monospace;
  font-size: 0.82rem;
  line-height: 1.85;
  overflow-x: auto;
}

.t-prompt  { color: var(--accent-pink); }
.t-comment { color: var(--text-muted); }
.t-ok      { color: #28c840; }
.t-err     { color: #ff5f57; }
.t-dim     { color: var(--text-muted); }
.t-accent  { color: var(--accent); }

/* ── Hero dual-button ── */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

/* ── Services ── */
.services h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 3rem;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 32px rgba(75, 143, 239, 0.12);
  transform: translateY(-3px);
}

.card-icon {
  width: 44px;
  height: 44px;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin-top: auto;
}

.card-tags li {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: rgba(75, 143, 239, 0.08);
  border: 1px solid rgba(75, 143, 239, 0.25);
  border-radius: 4px;
  padding: 0.2rem 0.55rem;
}

/* ── Process ── */
.process { background: var(--bg-alt); }

.process h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 3rem;
}

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

.process-step {
  border-left: 2px solid var(--border);
  padding-left: 1.5rem;
  transition: border-color var(--transition);
}

.process-step:hover { border-left-color: var(--accent); }

.step-number {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-variant-numeric: tabular-nums;
}

.process-step h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── Contact ── */
.contact { background: var(--bg-alt); }

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

.contact-text h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

.contact-text p {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.linkedin-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  transition: opacity var(--transition);
}

.linkedin-link:hover { opacity: 0.75; }

.linkedin-link svg {
  width: 20px;
  height: 20px;
}

/* Thank-you message */
.form-thankyou {
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
}

.thankyou-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.form-thankyou p:last-child {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.7rem 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(75, 143, 239, 0.15);
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2.5rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-nav {
  display: flex;
  gap: 1.5rem;
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .section { padding-block: 4rem; }

  /* Nav */
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 0;
    z-index: 99;
    background: var(--bg);
    flex-direction: column;
    justify-content: center;
    gap: 2.5rem;
    font-size: 1.2rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
  }

  body.nav-open .nav-links {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a.btn { font-size: 1.1rem; }

  /* Layouts */
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .services-grid,
  .process-steps {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero-headline { font-size: 2rem; }
}