/* ============================================================
   BASE
   ============================================================ */

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

:root {
  --accent:        #8B77C8;
  --accent-light:  #A897D8;
  --accent-dim:    rgba(139, 119, 200, 0.15);
  --text:          #F0EFF4;
  --text-secondary:#9B99A8;
  --bg:            #16151A;
  --bg-alt:        #1C1B22;
  --bg-card:       #1E1C26;
  --border:        #2E2B3A;
  --border-hover:  #3E3A52;
  --nav-height:    60px;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 960px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-light);
}

ul {
  list-style: none;
}

/* Focus states — accessibility */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ============================================================
   LAYOUT
   ============================================================ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 88px 0;
}

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.section-heading {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 40px;
}

.section-sub {
  color: var(--text-secondary);
  margin-bottom: 40px;
  font-size: 15px;
  margin-top: 4px;
}

/* ============================================================
   NAVIGATION
   ============================================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(22, 21, 26, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav-name {
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
  letter-spacing: -0.01em;
  transition: color 0.15s;
}

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

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.15s;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  padding: calc(var(--nav-height) + 80px) 0 64px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(139, 119, 200, 0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 24px;
  max-width: 780px;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 620px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-block;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}

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

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-hover);
}

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

/* ============================================================
   ABOUT
   ============================================================ */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 268px;
  gap: 64px;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-size: 16px;
  max-width: 58ch;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-text strong {
  color: var(--text);
  font-weight: 600;
}

.meta-list {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
}

.meta-list dt {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 14px 16px 3px;
}

.meta-list dd {
  font-size: 14px;
  color: var(--text);
  padding: 0 16px 14px;
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
}

.meta-list dd:last-child {
  border-bottom: none;
}

/* ============================================================
   PROJECTS
   ============================================================ */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: 16px;
}

.project-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  background: var(--bg-card);
  transition: border-color 0.2s, background 0.2s;
  cursor: default;
}

.project-card:not(.project-card--coming-soon) {
  cursor: pointer;
}

.project-card:hover {
  border-color: var(--border-hover);
  background: #221F2E;
}

.project-card--coming-soon {
  opacity: 0.6;
}

.project-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.project-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-light);
  background: var(--accent-dim);
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.02em;
}

.project-status {
  font-size: 12px;
  color: var(--text-secondary);
}

.project-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.4;
}

.project-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.project-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  transition: color 0.15s;
}

.project-link:hover {
  color: var(--accent-light);
}

.project-link--disabled {
  color: var(--text-secondary);
  pointer-events: none;
  cursor: default;
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */

.section-testimonials {
  padding: 64px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.testimonial {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  position: relative;
}

.testimonial::before {
  content: '\201C';
  position: absolute;
  top: 16px;
  left: 24px;
  font-size: 64px;
  line-height: 1;
  color: var(--accent);
  opacity: 0.25;
  font-family: Georgia, serif;
}

.testimonial p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  padding-top: 8px;
}

.testimonial footer {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.testimonial-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.testimonial-role {
  font-size: 12px;
  color: var(--text-secondary);
}

/* ============================================================
   SKILLS
   ============================================================ */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px 56px;
}

.skill-group-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  display: block;
  position: relative;
}

.skill-group-title::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--accent);
}

.skill-list li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  line-height: 1.4;
}

.skill-list li:last-child {
  border-bottom: none;
}

/* ============================================================
   CERTIFICATIONS
   ============================================================ */

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 48px 56px;
}

.cert-group-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  display: block;
  position: relative;
}

.cert-group-title::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--accent);
}

.cert-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.cert-list li:last-child {
  border-bottom: none;
}

.cert-name {
  color: var(--text);
  font-weight: 500;
  flex-shrink: 0;
}

.cert-issuer {
  color: var(--text-secondary);
  font-size: 13px;
  text-align: right;
}

/* ============================================================
   CONTACT
   ============================================================ */

.contact-sub {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 36px;
  max-width: 52ch;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-links a {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.15s;
}

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

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.site-footer p {
  font-size: 13px;
  color: var(--text-secondary);
}

.site-footer a {
  color: var(--text-secondary);
  transition: color 0.15s;
}

.site-footer a:hover {
  color: var(--accent);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
  }

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

  .nav-toggle {
    display: flex;
  }

  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px 32px;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .cert-grid {
    grid-template-columns: 1fr;
  }

  .cert-list li {
    flex-direction: column;
    gap: 2px;
  }

  .cert-issuer {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 28px;
  }

  .section {
    padding: 64px 0;
  }
}