/* ===== VARIABLES ===== */
:root {
  --bg: #0a0f1a;
  --bg-light: #0f1624;
  --bg-card: #141c2e;
  --border: rgba(78, 168, 200, 0.08);
  --border-hover: rgba(78, 168, 200, 0.15);
  --accent: #4ea8c8;
  --accent-dim: rgba(78, 168, 200, 0.12);
  --white: #e6edf3;
  --silver: #c9d1d9;
  --slate: #8b949e;
  --mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--silver);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.85; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===== LAYOUT ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }
section { padding: 6rem 0; }

/* ===== NAVIGATION ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1.25rem 0;
  transition: background 0.3s, backdrop-filter 0.3s;
}
.nav.scrolled {
  background: rgba(10, 15, 26, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nav .container { display: flex; justify-content: space-between; align-items: center; }
.nav-logo {
  font-size: 1.25rem; font-weight: 700; color: var(--white);
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a {
  font-size: 0.9rem; color: var(--slate); font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); opacity: 1; }
.nav-cta {
  background: var(--accent) !important; color: var(--bg) !important;
  padding: 0.6rem 1.4rem !important; border-radius: 8px;
  font-weight: 600 !important;
}
.nav-cta:hover { opacity: 0.9 !important; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span {
  display: block; width: 24px; height: 2px; background: var(--silver);
  margin: 5px 0; transition: 0.3s;
}

/* ===== HERO ===== */
.hero {
  padding: 10rem 0 6rem;
  position: relative;
}
.hero::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(78, 168, 200, 0.04) 0%, transparent 60%);
  pointer-events: none;
}
.hero-content { max-width: 720px; position: relative; z-index: 1; }
.hero-badge {
  display: inline-block;
  font-family: var(--mono); font-size: 0.8rem; font-weight: 500;
  color: var(--accent); letter-spacing: 0.04em;
  padding: 0.4rem 1rem;
  border: 1px solid var(--border-hover);
  border-radius: 100px;
  margin-bottom: 2rem;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700; line-height: 1.15;
  color: var(--white); letter-spacing: -0.03em;
}
.accent { color: var(--accent); }
.hero-sub {
  font-size: 1.2rem; color: var(--slate);
  margin-top: 1.5rem; max-width: 580px;
  line-height: 1.7;
}
.hero-actions {
  display: flex; gap: 1rem; margin-top: 2.5rem;
  flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.6rem;
  background: var(--accent); color: var(--bg);
  padding: 0.9rem 1.8rem; border-radius: 10px;
  font-weight: 600; font-size: 1rem;
  transition: opacity 0.2s, transform 0.2s;
  border: none; cursor: pointer;
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); color: var(--bg); }
.btn-primary svg { width: 16px; height: 16px; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 0.6rem;
  color: var(--silver);
  padding: 0.9rem 1.8rem; border-radius: 10px;
  font-weight: 600; font-size: 1rem;
  border: 1px solid rgba(201, 209, 217, 0.15);
  transition: border-color 0.2s, color 0.2s;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--white); opacity: 1; }

/* ===== SECTION LABELS ===== */
.section-label {
  display: inline-block;
  font-family: var(--mono); font-size: 0.8rem; font-weight: 500;
  color: var(--accent); letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
section h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700; color: var(--white);
  letter-spacing: -0.02em; line-height: 1.25;
  margin-bottom: 2rem;
}

/* ===== SERVICES GRID ===== */
.services { background: var(--bg-light); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: border-color 0.3s, transform 0.2s;
}
.service-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.service-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-dim);
  border-radius: 12px;
  margin-bottom: 1.5rem;
}
.service-icon svg { width: 24px; height: 24px; stroke: var(--accent); }
.service-card h3 {
  font-size: 1.15rem; font-weight: 600; color: var(--white);
  margin-bottom: 0.75rem;
}
.service-card p { font-size: 0.95rem; color: var(--slate); line-height: 1.7; }

/* ===== APPROACH ===== */
.approach-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 2rem;
}
.approach-text p {
  font-size: 1.1rem; line-height: 1.8; color: var(--silver);
}
.approach-text p + p { margin-top: 1.5rem; }
.approach-steps { display: flex; flex-direction: column; gap: 2rem; }
.approach-step {
  display: flex; gap: 1.25rem; align-items: flex-start;
}
.step-marker {
  font-family: var(--mono); font-size: 0.85rem; font-weight: 500;
  color: var(--accent);
  min-width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-hover);
  border-radius: 10px;
  flex-shrink: 0;
}
.approach-step h4 {
  font-size: 1rem; font-weight: 600; color: var(--white);
  margin-bottom: 0.35rem;
}
.approach-step p { font-size: 0.9rem; color: var(--slate); }

/* ===== TECH STACK ===== */
.stack { background: var(--bg-light); }
.stack-intro {
  font-size: 1.1rem; color: var(--slate); max-width: 640px;
  margin-bottom: 3rem;
}
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.stack-group h4 {
  font-family: var(--mono); font-size: 0.8rem; font-weight: 500;
  color: var(--accent); letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.stack-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  font-family: var(--mono); font-size: 0.8rem; font-weight: 400;
  color: var(--silver);
  padding: 0.35rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
}

/* ===== CONTACT ===== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 2rem;
}
.contact-text p {
  font-size: 1.1rem; line-height: 1.8; color: var(--silver);
}
.contact-details { margin-top: 2rem; }
.contact-detail {
  display: flex; align-items: center; gap: 0.75rem;
  margin-top: 0.75rem;
}
.contact-detail svg { width: 20px; height: 20px; stroke: var(--accent); flex-shrink: 0; }
.contact-detail a { font-size: 0.95rem; color: var(--silver); }
.contact-detail a:hover { color: var(--white); }

/* ===== 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(--slate);
}
.form-group .optional { color: var(--slate); font-weight: 400; font-size: 0.8rem; }
.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  color: var(--white);
  font-family: var(--sans);
  font-size: 0.95rem;
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--slate); opacity: 0.5; }
.form-submit { margin-top: 0.5rem; }

/* ===== FOOTER ===== */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}
.footer-content {
  display: flex; justify-content: space-between; align-items: center;
}
.footer-brand {
  font-size: 1.1rem; font-weight: 700; color: var(--white);
}
.footer-brand span { color: var(--accent); }
.footer-meta {
  font-size: 0.85rem; color: var(--slate);
  display: flex; align-items: center; gap: 0.5rem;
}
.footer-sep { color: rgba(139, 148, 158, 0.3); }
.footer-link { color: var(--slate); }
.footer-link:hover { color: var(--accent); }

/* ===== SERVICES PAGE ===== */
.page-header {
  padding: 10rem 0 4rem;
}
.page-header h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700; color: var(--white);
  letter-spacing: -0.03em;
}
.page-header p {
  font-size: 1.15rem; color: var(--slate);
  margin-top: 1rem; max-width: 580px;
}

.project-types { padding-top: 0; }
.project-type {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  margin-bottom: 2rem;
  background: var(--bg-light);
  transition: border-color 0.3s;
}
.project-type:hover { border-color: var(--border-hover); }
.project-type-header {
  display: flex; align-items: center; gap: 1.25rem;
  margin-bottom: 2rem;
}
.project-type-number {
  font-family: var(--mono); font-size: 0.85rem; font-weight: 500;
  color: var(--accent);
  min-width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border-hover);
  border-radius: 12px;
  flex-shrink: 0;
}
.project-type-header h2 {
  font-size: 1.5rem; margin-bottom: 0;
}
.project-type-content {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 3rem;
}
.project-type-text p {
  font-size: 1rem; color: var(--silver); line-height: 1.8;
}
.project-type-text h4 {
  font-size: 0.9rem; font-weight: 600; color: var(--white);
  margin-top: 1.5rem; margin-bottom: 0.75rem;
}
.project-type-text ul {
  list-style: none; padding: 0;
}
.project-type-text li {
  font-size: 0.9rem; color: var(--slate);
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
}
.project-type-text li::before {
  content: '';
  position: absolute; left: 0; top: 0.75rem;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}
.project-type-details {
  display: flex; flex-direction: column; gap: 1.5rem;
  padding-top: 0.5rem;
}
.detail-block h5 {
  font-family: var(--mono); font-size: 0.75rem; font-weight: 500;
  color: var(--accent); letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}
.detail-block p {
  font-size: 1.1rem; font-weight: 600; color: var(--white);
}

/* ===== PRICING NOTE ===== */
.pricing-note {
  background: var(--bg-light);
}
.pricing-note-content {
  max-width: 640px;
}
.pricing-note-content h2 {
  font-size: 1.75rem;
}
.pricing-note-content p {
  font-size: 1.05rem; color: var(--silver); line-height: 1.8;
}
.pricing-note-content p + p { margin-top: 1.25rem; }
.pricing-note-content .btn-primary { margin-top: 2rem; }

/* ===== REVEAL ANIMATIONS ===== */
.reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .services-grid { grid-template-columns: 1fr; }
  .approach-content { grid-template-columns: 1fr; gap: 3rem; }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-wrapper { grid-template-columns: 1fr; gap: 3rem; }
  .project-type-content { grid-template-columns: 1fr; gap: 2rem; }
  .project-type-details { flex-direction: row; gap: 2rem; }
}

@media (max-width: 640px) {
  section { padding: 4rem 0; }
  .container { padding: 0 1.25rem; }
  .hero { padding: 8rem 0 4rem; }
  .page-header { padding: 8rem 0 3rem; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg);
    justify-content: center; align-items: center;
    gap: 2rem;
    z-index: 99;
  }
  .nav-links.open a { font-size: 1.25rem; color: var(--silver); }
  .nav-toggle { display: block; z-index: 101; }

  .stack-grid { grid-template-columns: 1fr; }
  .project-type { padding: 1.5rem; }
  .project-type-details { flex-direction: column; }
  .footer-content { flex-direction: column; gap: 0.75rem; text-align: center; }
}