/* ============================================
   Antony Britto C J — Professional Portfolio
   ============================================ */

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2234;
  --bg-card-hover: #1f2a40;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --accent-gradient: linear-gradient(135deg, #3b82f6, #6366f1);
  --border: rgba(148, 163, 184, 0.1);
  --border-hover: rgba(59, 130, 246, 0.3);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --nav-height: 72px;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

ul {
  list-style: none;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.nav--scrolled {
  background: rgba(10, 14, 23, 0.95);
  box-shadow: var(--shadow);
}

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

.nav__logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

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

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--text-primary);
}

.nav__cta {
  background: var(--accent-gradient);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600 !important;
}

.nav__cta:hover {
  opacity: 0.9;
  color: #fff !important;
}

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

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
  border-radius: 2px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

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

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
  color: #fff;
}

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

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

.btn--full {
  width: 100%;
}

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

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(59, 130, 246, 0.12), transparent),
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(99, 102, 241, 0.08), transparent);
  pointer-events: none;
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
  padding: 80px 24px;
}

.hero__greeting {
  font-size: 1.1rem;
  color: var(--accent-light);
  font-weight: 500;
  margin-bottom: 8px;
}

.hero__name {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero__title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 20px;
}

.hero__title-sep {
  color: var(--text-muted);
}

.hero__subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero__stats {
  display: flex;
  gap: 40px;
}

.hero__stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent-light);
  font-family: var(--font-mono);
}

.hero__stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero__image-wrap {
  position: relative;
  width: 320px;
  height: 320px;
}

.hero__image-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: var(--accent-gradient);
  opacity: 0.3;
  animation: pulse-ring 3s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.05); opacity: 0.15; }
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--bg-primary);
  position: relative;
  z-index: 1;
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  animation: bounce 2s ease-in-out infinite;
  z-index: 1;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---- Sections ---- */
.section {
  padding: 100px 0;
}

.section__header {
  margin-bottom: 56px;
}

.section__tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* ---- About ---- */
.about__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
}

.about__lead {
  font-size: 1.15rem;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 16px;
}

.about__content p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.about__info {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
}

.about__info-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.about__info-item svg {
  color: var(--accent);
  flex-shrink: 0;
}

.about__highlights {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.about__highlights h3 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--accent-light);
}

.highlights__list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.highlights__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---- Expertise ---- */
.expertise {
  background: var(--bg-secondary);
}

.expertise__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.expertise__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

.expertise__card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.expertise__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: 12px;
  color: var(--accent-light);
  margin-bottom: 16px;
}

.expertise__card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.expertise__card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.expertise__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.expertise__tags span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 4px 10px;
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-light);
  border-radius: 6px;
}

.skills__categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skills__category h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.skills__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skills__list span {
  font-size: 0.85rem;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.skills__list span:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

/* ---- Timeline ---- */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border);
}

.timeline__item {
  position: relative;
  margin-bottom: 40px;
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__marker {
  position: absolute;
  left: -32px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  z-index: 1;
}

.timeline__content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition);
}

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

.timeline__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 12px;
}

.timeline__header h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.timeline__company {
  color: var(--accent-light);
  font-size: 0.9rem;
  font-weight: 500;
}

.timeline__date {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.timeline__content > p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.timeline__content ul li {
  position: relative;
  padding-left: 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.timeline__content ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ---- Projects ---- */
.projects {
  background: var(--bg-secondary);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.project__card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.project__number {
  font-size: 2.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: rgba(59, 130, 246, 0.15);
  line-height: 1;
  margin-bottom: 16px;
}

.project__card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.project__card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.project__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.project__tags span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 4px 10px;
  background: rgba(59, 130, 246, 0.08);
  color: var(--text-muted);
  border-radius: 6px;
}

/* ---- Certifications ---- */
.certs__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.certs__section h3 {
  font-size: 1.1rem;
  margin-bottom: 24px;
  color: var(--accent-light);
}

.certs__list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

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

.certs__badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-glow);
  color: var(--accent-light);
  font-size: 0.7rem;
  font-weight: 700;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.certs__badge.edu {
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
}

.certs__list li div {
  display: flex;
  flex-direction: column;
}

.certs__list li strong {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.certs__list li span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

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

.contact__text p {
  color: var(--text-secondary);
  margin-top: 16px;
  margin-bottom: 32px;
  font-size: 1.05rem;
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact__link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition);
}

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

.contact__link svg {
  flex-shrink: 0;
  color: var(--accent);
}

.contact__form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.form__group {
  margin-bottom: 20px;
}

.form__group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form__group input,
.form__group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
}

.form__group input:focus,
.form__group textarea:focus {
  border-color: var(--accent);
}

.form__group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ---- Footer ---- */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.footer__tagline {
  font-family: var(--font-mono);
  font-size: 0.8rem !important;
}

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .expertise__grid,
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform var(--transition);
  }

  .nav__links.open {
    transform: translateY(0);
  }

  .hero__content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
    padding: 60px 24px;
  }

  .hero__image-wrap {
    width: 240px;
    height: 240px;
    margin: 0 auto;
    order: -1;
  }

  .hero__title {
    justify-content: center;
  }

  .hero__subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__stats {
    justify-content: center;
    gap: 24px;
  }

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

  .expertise__grid,
  .projects__grid {
    grid-template-columns: 1fr;
  }

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

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

  .timeline__header {
    flex-direction: column;
    gap: 8px;
  }

  .footer__inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__stats {
    flex-direction: column;
    gap: 16px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

  .hero__actions .btn {
    width: 100%;
    max-width: 280px;
  }
}