:root {
  --color-bg: #d3f1ff;
  --color-surface: #80CEE1;
  --color-muted-surface: #d3f1ff;
  --color-primary: #1e2a47;
  --color-primary-soft: #3d7bff;
  --color-accent: #ffb454;
  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-border: #ffffff;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.18);
  --shadow-card: 0 12px 28px rgba(15, 23, 42, 0.08);
  --transition-fast: 0.18s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.4rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #b3f0ff;
  border-bottom: 1px solid rgba(109, 172, 255, 0.8);
  backdrop-filter: blur(14px);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background: radial-gradient(circle at 20% 20%, var(--color-accent), var(--color-primary-soft));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f9fafb;
  font-weight: 700;
  margin-right: 0.6rem;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--color-primary);
}

.logo-subtitle {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.nav {
  display: none;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: block;
  padding: 0.5rem 0;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: 999px;
  transition: color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary-soft);
}

.nav-link-active {
  color: var(--color-primary);
}

.nav-link-cta {
  font-weight: 600;
}

.theme-toggle {
  border: none;
  background: transparent;
  border-radius: 999px;
  margin-right: 0.6rem;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.theme-toggle-icon {
  transition: transform var(--transition-fast);
}

.nav-toggle {
  border: none;
  background: transparent;
  padding: 0.2rem;
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.nav-toggle-bar {
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-primary);
}

.nav.open {
  display: block;
  position: absolute;
  inset-inline: 0;
  top: 72px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.nav.open .nav-list {
  padding: 0.75rem 1.4rem 1rem;
}

.nav.open .nav-link {
  padding-inline: 0.75rem;
}

.hero {
  padding: 3rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
}

.hero-text {
  max-width: 34rem;
}

.hero-kicker {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-primary-soft);
  font-weight: 600;
}

.hero h1 {
  margin: 0.7rem 0 0.4rem;
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 2.2rem;
  color: var(--color-primary);
}

.hero-highlight {
  position: relative;
  display: inline-block;
}



.hero-subtitle {
  margin: 0 0 1.3rem;
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.4rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.hero-stats dt {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.hero-stats dd {
  margin: 0.15rem 0 0;
  font-size: 0.9rem;
  color: var(--color-primary);
}

.hero-profile {
  display: flex;
  justify-content: center;
}

.profile-card {
  width: 100%;
  max-width: 320px;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top left, rgba(61, 123, 255, 0.16), transparent 55%),
    radial-gradient(circle at bottom right, rgba(255, 180, 84, 0.12), transparent 60%),
    var(--color-surface);
  box-shadow: var(--shadow-card);
  padding: 1.4rem 1.3rem;
}

.profile-avatar {
  width: 62px;
  height: 62px;
  border-radius: 999px;
  background: linear-gradient(135deg, #3b82f6, #ec4899);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f9fafb;
  font-weight: 700;
  font-size: 1.6rem;
  margin-bottom: 0.6rem;
}

.profile-info {
  margin-bottom: 0.5rem;
}

.profile-name {
  margin: 0;
  font-size: 1.2rem;
  color: var(--color-primary);
}

.profile-role {
  margin: 0.1rem 0 0.3rem;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}

.profile-bio {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0 0 0.8rem;
}

.profile-tags {
  list-style: none;
  padding: 0;
  margin: 0 0 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.profile-tags li {
  font-size: 0.78rem;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.16);
  color: var(--color-primary);
}

.profile-footer {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.profile-status-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: #22c55e;
}

.section {
  padding: 2.7rem 0;
}

.section-muted {
  background: var(--color-muted-surface);
}

.section-emphasis {
  background: radial-gradient(circle at top left, #3b82f6, #1e293b);
  color: #e5e7eb;
}

.section-header {
  margin-bottom: 1.6rem;
}

.section-header-tight {
  margin-bottom: 1rem;
}

.section-header h2 {
  margin: 0 0 0.4rem;
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 1.4rem;
  color: var(--color-primary);
}

.section-muted .section-header h2 {
  color: var(--color-primary);
}

.section-header p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.section-emphasis .section-header h2 {
  color: #e5e7eb;
}

.section-emphasis .section-header p {
  color: #cbd5f5;
}

.grid-3 {
  display: grid;
  gap: 1.4rem;
}

.split {
  display: grid;
  gap: 2rem;
  align-items: flex-start;
}

.card {
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: 1.4rem 1.35rem;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(148, 163, 184, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
  border-color: rgba(61, 123, 255, 0.6);
}

.card h3 {
  margin: 0 0 0.45rem;
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.card p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--color-text-muted);
}

.card-accent {
  background: linear-gradient(135deg, rgba(61, 123, 255, 0.05), rgba(255, 180, 84, 0.08)), var(--color-surface);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.3rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #f9fafb;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.55);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 45px rgba(37, 99, 235, 0.7);
}

.btn-ghost {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: rgba(148, 163, 184, 0.7);
}

.btn-ghost:hover {
  border-color: var(--color-primary-soft);
  color: var(--color-primary-soft);
}

.btn-light {
  background: #f9fafb;
  color: #0f172a;
}

.btn-light:hover {
  background: #e5e7eb;
}

.btn-outline {
  border-color: rgba(148, 163, 184, 0.8);
  color: #e5e7eb;
  background: transparent;
}

.btn-outline:hover {
  border-color: rgba(251, 191, 36, 0.8);
  color: #fbbf24;
}

.btn-block {
  width: 100%;
  justify-content: center;
}

.list-pills {
  list-style: none;
  padding: 0;
  margin: 0.7rem 0 0.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.list-pills li {
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.16);
  font-size: 0.85rem;
  color: var(--color-primary);
}

.list-check {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0;
  display: grid;
  gap: 0.35rem;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.list-check li {
  position: relative;
  padding-left: 1.4rem;
}

.list-check li::before {
  content: "✔";
  position: absolute;
  left: 0;
  top: 0.12rem;
  font-size: 0.8rem;
  color: #22c55e;
}

.list-inline {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.page-hero {
  padding: 2.2rem 0 1.7rem;
}

.page-hero h1 {
  margin: 0 0 0.4rem;
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 1.8rem;
  color: var(--color-primary);
}

.page-hero p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.card-photo {
  max-width: 320px;
}

.photo-placeholder {
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #1f2937, #020617);
  color: #e5e7eb;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.96rem;
  box-shadow: var(--shadow-soft);
  padding: 1rem;
}

.photo-caption {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0.7rem 0 0;
}

.about-body h2 {
  margin-top: 0;
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 1.4rem;
  color: var(--color-primary);
}

.about-body h3 {
  margin: 1.2rem 0 0.4rem;
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 1.05rem;
  color: var(--color-primary);
}

.about-body p {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.timeline {
  display: grid;
  gap: 1rem;
  max-width: 680px;
}

.timeline-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  align-items: flex-start;
}

.timeline-year {
  font-size: 0.8rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.08);
  color: #1d4ed8;
  white-space: nowrap;
}

.timeline-content h3 {
  margin: 0 0 0.2rem;
  font-size: 1rem;
  font-family: "Poppins", system-ui, sans-serif;
  color: var(--color-primary);
}

.timeline-content p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.skills-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.9rem;
}

.skill {
  border-radius: var(--radius-md);
  padding: 0.75rem 0.85rem;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(248, 250, 252, 0.9);
}

body.theme-dark .skill {
  background: rgba(15, 23, 42, 0.9);
}

.skill-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.4rem;
  margin-bottom: 0.4rem;
}

.skill-label span:first-child {
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--color-primary);
}

.skill-level {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}

.skill-bar {
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.3);
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #3b82f6, #f97316);
}

.project-grid {
  align-items: stretch;
}

.project-card {
  position: relative;
}

.project-type {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 0.25rem;
}

.project-tech {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.project-tech li {
  font-size: 0.8rem;
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.05);
  color: #1d4ed8;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.project-link {
  font-size: 0.86rem;
  text-decoration: none;
  color: var(--color-primary-soft);
  font-weight: 500;
}

.project-link::after {
  content: " ↗";
  font-size: 0.8em;
}

.list-steps {
  margin: 0.6rem 0 0;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

.list-steps li + li {
  margin-top: 0.4rem;
}

.list-steps h3 {
  margin: 0 0 0.15rem;
  font-size: 0.96rem;
  font-family: "Poppins", system-ui, sans-serif;
  color: var(--color-primary);
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0.7rem 0 0.5rem;
  font-size: 0.95rem;
}

.contact-list li {
  display: flex;
  flex-direction: column;
  margin-bottom: 0.3rem;
}

.contact-list span {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
}

.contact-list a {
  color: var(--color-primary-soft);
  text-decoration: none;
}

.contact-list a:hover {
  text-decoration: underline;
}

.small-text {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: 0.4rem;
}

.contact-card h2 {
  margin-top: 0;
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 1.3rem;
  color: var(--color-primary);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}

.form-field label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--color-primary);
}

.req {
  color: #ef4444;
  margin-left: 0.2rem;
}

.form-field input,
.form-field textarea {
  font: inherit;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.8);
  padding: 0.55rem 0.75rem;
  background: #f9fafb;
  resize: vertical;
}

body.theme-dark .form-field input,
body.theme-dark .form-field textarea {
  background: #020617;
  border-color: rgba(148, 163, 184, 0.7);
  color: var(--color-text);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.6);
}

.form-error {
  min-height: 0.9rem;
  font-size: 0.76rem;
  color: #ef4444;
}

.form-success {
  font-size: 0.84rem;
  color: #16a34a;
  margin: 0.3rem 0 0;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 1.3rem 0 1.5rem;
  margin-top: 2.5rem;
}

.footer-container {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  align-items: flex-start;
  font-size: 0.8rem;
}

.footer-name {
  margin: 0 0 0.15rem;
  font-weight: 500;
  color: var(--color-primary);
}

.footer-text {
  margin: 0;
  color: var(--color-text-muted);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--color-primary-soft);
}

.footer-links a:hover {
  text-decoration: underline;
}

.cta {
  display: grid;
  gap: 1.4rem;
  align-items: center;
}

.cta-text h2 {
  margin: 0 0 0.3rem;
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 1.6rem;
}

.cta-text p {
  margin: 0;
  font-size: 0.96rem;
  color: #cbd5f5;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

@media (min-width: 768px) {
  .nav {
    display: block;
    position: static;
  }

  .nav-list {
    display: flex;
    align-items: center;
    gap: 0.7rem;
  }

  .nav-link {
    padding-inline: 0.8rem;
  }

  .nav-link-cta {
    padding-inline: 1rem;
    background: rgba(37, 99, 235, 0.09);
    color: #1d4ed8;
  }

  .nav-link-cta.nav-link-active {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #f9fafb;
  }

  .nav-toggle {
    display: none;
  }

  .header-container {
    gap: 1rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

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

  .split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
  }

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

  .footer-container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: 3.3rem 0 3.7rem;
  }

  .hero h1 {
    font-size: 2.6rem;
  }

  .page-hero h1 {
    font-size: 2rem;
  }

  .container {
    padding-inline: 1.6rem;
  }
}