/* --- The Matrix Mind — single page, responsive --- */
:root {
  --bg: #0a0b0d;
  --bg-elevated: #12141a;
  --surface: #1a1d24;
  --text: #e8eaed;
  --text-muted: #8b8f98;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.15);
  --border: rgba(255, 255, 255, 0.06);
  --font-sans: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --radius-lg: 20px;
  --header-h: 72px;
  --container: min(100% - 2rem, 1100px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  width: var(--container);
  margin-inline: auto;
  padding-inline: 1rem;
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10, 11, 13, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.logo {
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1.5rem;
    gap: 0.5rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    display: block;
    padding: 0.75rem;
    font-size: 1rem;
  }
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--header-h);
  padding-bottom: 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 20%, var(--accent-dim) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-elevated) 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 640px;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.9rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border: 2px solid var(--accent);
}

.btn-primary:hover {
  background: transparent;
  color: var(--accent);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--border);
}

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

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.scroll-line {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* --- Sections common --- */
.section {
  padding: 5rem 0;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
  color: var(--text);
}

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

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

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

.about-lead {
  font-size: 1.2rem;
  color: var(--text) !important;
  margin-bottom: 1.25rem !important;
}

.about-visual {
  aspect-ratio: 1;
  max-width: 320px;
  margin-left: auto;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
}

.matrix-grid {
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(0, 212, 170, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 170, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-visual {
    margin-inline: auto;
    max-width: 280px;
  }

  .section {
    padding: 3.5rem 0;
  }
}

/* --- Services --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color 0.2s, transform 0.2s;
}

.service-card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.service-icon {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.service-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
}

/* --- FAQ --- */
.faq {
  background: var(--bg);
}

.faq-list {
  max-width: 640px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: border-color 0.2s;
}

.faq-item:hover,
.faq-item[open] {
  border-color: var(--accent-dim);
}

.faq-question {
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--text);
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.2s;
}

.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 0;
  margin-left: 0;
}

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

.contact-lead {
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  text-align: center;
}

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

.contact-form {
  max-width: 520px;
  margin: 0 auto 3rem;
}

.form-row {
  margin-bottom: 1.25rem;
}

.form-row label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.form-row .required {
  color: var(--accent);
}

.form-row input,
.form-row textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.form-row input::placeholder,
.form-row textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-row textarea {
  resize: vertical;
  min-height: 120px;
}

.form-message {
  font-size: 0.95rem;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
}

.form-message--success {
  background: var(--accent-dim);
  color: var(--accent);
}

.form-message--error {
  background: rgba(255, 100, 100, 0.1);
  color: #ff8a8a;
}

.btn-submit {
  width: 100%;
  cursor: pointer;
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.contact-direct {
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.contact-direct-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.contact-direct .contact-email {
  display: inline-block;
  margin-bottom: 0.5rem;
}

.contact-email {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  text-decoration: none;
  margin-bottom: 1.5rem;
  transition: opacity 0.2s;
}

.contact-email:hover {
  opacity: 0.85;
}

.contact-phone {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--accent);
  text-decoration: none;
  margin-bottom: 1.5rem;
  transition: opacity 0.2s;
}

.contact-phone:hover {
  opacity: 0.85;
}

.contact-social {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.contact-social a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.contact-social a:hover {
  color: var(--accent);
}

/* --- Footer --- */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.footer p {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
}