:root {
  color-scheme: dark;
  --bg: #0B141A;
  --card: #12222B;
  --accent: #14B8A6;
  --glow: #2DD4BF;
  --text-main: #E6FFFA;
  --text-secondary: #9CA3AF;
  --border: rgba(255, 255, 255, 0.08);
  --bg-gradient: linear-gradient(135deg, #0B141A, #12222B);
  --glow-soft: rgba(45, 212, 191, 0.16);
  --glow-strong: rgba(45, 212, 191, 0.25);
  --card-shadow: 0 22px 60px rgba(0, 0, 0, 0.28);
  --radius: 16px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --container: 1180px;
  --section-space: 112px;
  --transition: 0.3s ease;
  --danger: #fb7185;
  --success-bg: rgba(20, 184, 166, 0.12);
  --danger-bg: rgba(251, 113, 133, 0.1);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 18%, rgba(45, 212, 191, 0.12), transparent 18%),
    radial-gradient(circle at 82% 14%, rgba(20, 184, 166, 0.08), transparent 20%),
    var(--bg-gradient);
  color: var(--text-main);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(45, 212, 191, 0.08), transparent 32%);
  pointer-events: none;
  z-index: 0;
}

body.loading {
  overflow: hidden;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition), text-shadow var(--transition), border-color var(--transition), opacity var(--transition);
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 3px;
}

.site-loader {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 30%, rgba(45, 212, 191, 0.14), transparent 28%),
    var(--bg-gradient);
  transition: opacity 0.45s ease, visibility 0.45s ease;
}

.site-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-mark {
  display: grid;
  justify-items: center;
  gap: 1rem;
}

.loader-ring {
  width: 62px;
  height: 62px;
  border: 3px solid rgba(255, 255, 255, 0.08);
  border-top-color: var(--glow);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  box-shadow: 0 0 22px rgba(45, 212, 191, 0.18);
}

.loader-text {
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.page-shell {
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(10px);
  background: rgba(11, 20, 26, 0.68);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.nav-wrap.scrolled {
  background: rgba(11, 20, 26, 0.88);
  border-color: var(--border);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.22);
}

.navbar {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.brand:hover {
  color: var(--glow);
  text-shadow: 0 0 18px rgba(45, 212, 191, 0.32);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition), box-shadow var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-main);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
  box-shadow: 0 0 14px rgba(45, 212, 191, 0.4);
}

.mobile-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(18, 34, 43, 0.88);
  color: var(--text-main);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.28rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.mobile-toggle span {
  width: 18px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--text-main);
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-toggle:hover {
  border-color: rgba(45, 212, 191, 0.4);
  box-shadow: 0 0 18px rgba(45, 212, 191, 0.14);
}

.mobile-toggle.open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-toggle.open span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.section {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
  padding: var(--section-space) 0;
}

.section-heading {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 2rem;
}

.section-title {
  margin: 0;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.section-heading h2 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
  line-height: 1.15;
}

.surface-card {
  position: relative;
  background: rgba(18, 34, 43, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
}

.hero {
  min-height: calc(100vh - 80px);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  align-items: center;
  gap: 3rem;
  padding-top: 7rem;
}

.hero-copy {
  max-width: 700px;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3rem, 6vw, 5.2rem);
  line-height: 0.96;
}

.gradient-text {
  background: linear-gradient(135deg, var(--text-main), var(--glow));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.animated-title {
  margin: 1rem 0 0;
  min-height: 3.5rem;
  color: var(--glow);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 600;
}

.hero-text {
  margin: 1.5rem 0 2.5rem;
  max-width: 580px;
  color: var(--text-secondary);
  font-size: 1.02rem;
}

.hero-actions,
.contact-actions,
.project-actions,
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn,
.btn-secondary,
.project-btn,
.filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.9rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition), opacity var(--transition);
}

.btn {
  background: var(--accent);
  color: #081116;
}

.btn:hover {
  transform: translateY(-2px) scale(1.02);
  background: var(--glow);
  color: #081116;
  box-shadow: 0 0 20px rgba(45, 212, 191, 0.3);
}

.btn:disabled {
  opacity: 0.7;
  cursor: wait;
  transform: none;
  box-shadow: none;
}

.btn-secondary,
.project-btn,
.filter-chip {
  border-color: rgba(20, 184, 166, 0.45);
  background: transparent;
  color: var(--accent);
}

.btn-secondary:hover,
.project-btn:hover,
.filter-chip:hover {
  transform: translateY(-2px) scale(1.02);
  background: rgba(20, 184, 166, 0.12);
  color: var(--glow);
  box-shadow: 0 0 20px rgba(45, 212, 191, 0.22);
}

.resume-btn {
  box-shadow: 0 0 18px rgba(45, 212, 191, 0.16);
}

.project-btn-disabled {
  pointer-events: none;
  opacity: 0.5;
}

.link-muted {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.filter-chip {
  cursor: pointer;
}

.filter-chip.active {
  background: rgba(20, 184, 166, 0.16);
  color: var(--text-main);
  border-color: rgba(45, 212, 191, 0.35);
  box-shadow: 0 0 18px rgba(45, 212, 191, 0.16);
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 420px;
}

.profile-glow {
  position: absolute;
  width: min(78vw, 360px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(45, 212, 191, 0.34), rgba(45, 212, 191, 0.08) 45%, transparent 72%);
  filter: blur(12px);
}

.profile-image-container {
  position: relative;
  padding: 1rem;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(45, 212, 191, 0.16), rgba(18, 34, 43, 0.24));
  border: 1px solid rgba(45, 212, 191, 0.18);
  box-shadow: 0 0 36px rgba(45, 212, 191, 0.14);
}

.profile-image {
  width: min(78vw, 320px);
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid rgba(230, 255, 250, 0.08);
  box-shadow: 0 0 30px rgba(45, 212, 191, 0.22);
}

.section-content,
.timeline,
.project-grid,
.cert-grid,
.skill-grid,
.contact-grid {
  display: grid;
  gap: 1.5rem;
}

.about-copy,
.contact-copy,
.timeline-card,
.project-card,
.cert-card,
.skill-card,
.contact-card {
  padding: 1.6rem;
}

.about-copy p,
.contact-copy p,
.timeline-card p,
.project-card p,
.cert-card p {
  margin: 0;
  color: var(--text-secondary);
}

.about-copy {
  max-width: 760px;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.about-copy p + p,
.contact-copy p + p {
  margin-top: 1rem;
}

.timeline-card,
.project-card,
.cert-card,
.skill-card,
.contact-card,
.contact-copy,
.social-link,
.tech-pill,
.skill-pill {
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition), color var(--transition);
}

.timeline-card:hover,
.project-card:hover,
.cert-card:hover,
.skill-card:hover,
.contact-card:hover,
.contact-copy:hover {
  transform: translateY(-6px);
  box-shadow: 0 0 20px var(--glow-strong);
  border-color: rgba(45, 212, 191, 0.2);
}

.timeline-card h3,
.project-card h3,
.cert-card h3,
.skill-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.2rem;
}

.timeline-card span,
.project-header span,
.cert-card span {
  color: var(--accent);
  font-size: 0.95rem;
}

.project-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.project-card,
.cert-card,
.skill-card {
  display: grid;
  gap: 1rem;
}

.project-card.is-hidden {
  display: none;
}

.project-header {
  display: grid;
  gap: 0.35rem;
}

.tech-list,
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.tech-pill,
.skill-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0.55rem 0.95rem;
  border-radius: 20px;
  background: rgba(20, 184, 166, 0.1);
  border: 1px solid rgba(20, 184, 166, 0.18);
  color: var(--accent);
  font-size: 0.9rem;
  line-height: 1.2;
}

.tech-pill:hover,
.skill-pill:hover {
  background: rgba(20, 184, 166, 0.18);
  color: var(--glow);
  box-shadow: 0 0 16px rgba(45, 212, 191, 0.2);
}

.project-actions {
  margin-top: 0.25rem;
}

.project-actions .project-btn {
  min-width: 132px;
}

.cert-grid,
.skill-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contact-grid {
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  align-items: start;
}

.contact-actions {
  margin-top: 1.5rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.4rem;
}

.social-link {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: rgba(20, 184, 166, 0.08);
  border: 1px solid rgba(20, 184, 166, 0.14);
  border-radius: var(--radius-sm);
}

.social-link:hover {
  transform: translateY(-3px);
  background: rgba(20, 184, 166, 0.14);
  box-shadow: 0 0 18px rgba(45, 212, 191, 0.2);
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.form-group {
  display: grid;
  gap: 0.5rem;
}

.form-group label {
  color: var(--text-main);
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(18, 34, 43, 0.92);
  color: var(--text-main);
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(156, 163, 175, 0.78);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.14), 0 0 20px rgba(45, 212, 191, 0.2);
  background: rgba(18, 34, 43, 1);
}

.form-group input.invalid,
.form-group textarea.invalid {
  border-color: rgba(251, 113, 133, 0.56);
  box-shadow: 0 0 0 3px rgba(251, 113, 133, 0.08);
}

.field-error {
  min-height: 1.1rem;
  margin: 0;
  color: var(--danger);
  font-size: 0.85rem;
}

.form-success,
.form-error {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  color: var(--text-main);
}

.form-success {
  border: 1px solid rgba(20, 184, 166, 0.24);
  background: var(--success-bg);
}

.form-error {
  border: 1px solid rgba(251, 113, 133, 0.24);
  background: var(--danger-bg);
}

.footer {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
  padding: 0 0 2.5rem;
  color: var(--text-secondary);
  text-align: center;
}

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (max-width: 980px) {
  :root {
    --section-space: 96px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .hero-copy {
    max-width: 100%;
  }

  .hero-actions,
  .contact-actions,
  .project-filters {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
    min-height: 340px;
  }

  .contact-grid,
  .cert-grid,
  .skill-grid,
  .project-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  :root {
    --section-space: 84px;
  }

  .mobile-toggle {
    display: inline-flex;
  }

  .nav-list {
    position: fixed;
    top: 76px;
    left: 1rem;
    right: 1rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem;
    background: rgba(18, 34, 43, 0.96);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition);
  }

  .nav-list.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    padding: 0.75rem 0.25rem;
  }

  .section-heading h2 {
    font-size: clamp(1.7rem, 6vw, 2.3rem);
  }

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

@media (max-width: 560px) {
  .navbar,
  .section,
  .footer {
    width: min(var(--container), calc(100% - 1.25rem));
  }

  .hero {
    min-height: auto;
    padding-top: 6rem;
  }

  .hero h1 {
    font-size: clamp(2.5rem, 13vw, 3.5rem);
  }

  .animated-title {
    min-height: 2.8rem;
    font-size: 1.35rem;
  }

  .btn,
  .btn-secondary,
  .project-btn,
  .filter-chip {
    width: 100%;
  }

  .about-copy,
  .contact-copy,
  .timeline-card,
  .project-card,
  .cert-card,
  .skill-card,
  .contact-card {
    padding: 1.25rem;
  }

  .profile-image {
    width: min(72vw, 250px);
  }

  .project-actions {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}