:root {
  --bg: #0f1221;
  --bg-alt: #151a2f;
  --card: #1d2440;
  --text: #eef1ff;
  --muted: #b4bddf;
  --primary: #6ea8fe;
  --primary-strong: #4f8cf8;
  --border: #2f3a67;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

body.light {
  --bg: #f7f9ff;
  --bg-alt: #ffffff;
  --card: #ffffff;
  --text: #10152b;
  --muted: #4c577e;
  --primary: #255ddf;
  --primary-strong: #1e4fbe;
  --border: #dbe3ff;
  --shadow: 0 10px 24px rgba(26, 44, 95, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
}

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

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

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--bg-alt);
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin-top: 0;
}

h2 {
  font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.2rem);
  margin-bottom: 1.4rem;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--border);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.logo {
  font-weight: 800;
  color: var(--text);
  font-size: 1.2rem;
}

.logo span {
  color: var(--primary);
}

.nav {
  display: flex;
  gap: 1rem;
}

.nav a {
  color: var(--muted);
  font-weight: 500;
  padding: 0.4rem 0.6rem;
  border-radius: 8px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav a.active,
.nav a:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--primary) 20%, transparent);
  text-decoration: none;
}

.menu-toggle,
.theme-toggle {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
}

.theme-toggle {
  width: 42px;
  height: 42px;
  font-size: 1rem;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 8px;
  flex-direction: column;
  justify-content: space-between;
}

.menu-toggle span {
  display: block;
  height: 3px;
  border-radius: 999px;
  background: var(--text);
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
}

.eyebrow {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.hero h1 {
  font-size: clamp(2rem, 1.2rem + 4vw, 3.3rem);
  margin-bottom: 0.8rem;
}

.subtitle {
  color: var(--muted);
  max-width: 560px;
}

.impact {
  font-size: 1.05rem;
  font-style: italic;
  margin: 1rem 0 1.8rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.1rem;
  border-radius: 10px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-strong);
}

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

.hero-avatar img {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 22px;
  box-shadow: var(--shadow);
  margin-left: auto;
}

.chip-list {
  margin-top: 1.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.chip {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  font-size: 0.9rem;
}

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

.skill-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.skill-card p {
  color: var(--muted);
  margin: 0.3rem 0 0.8rem;
}

.progress {
  height: 9px;
  background: color-mix(in srgb, var(--muted) 20%, transparent);
  border-radius: 999px;
  overflow: hidden;
}

.progress span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-strong));
}

.projects-grid {
  display: grid;
  gap: 1rem;
}

.project-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.project-card img {
  border-radius: 10px;
  width: 100%;
  height: 100%;
  min-height: 140px;
  object-fit: cover;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.contact-form {
  display: grid;
  gap: 0.55rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
}

.contact-form input,
.contact-form textarea {
  background: var(--bg-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--primary) 40%, transparent);
  border-color: var(--primary);
}

.feedback {
  min-height: 1.4rem;
  margin: 0.3rem 0 0;
  font-weight: 600;
}

.feedback.success {
  color: #19c37d;
}

.feedback.error {
  color: #ff6b6b;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 1.2rem 0;
  text-align: center;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 950px) {
  .hero-grid,
  .contact-grid,
  .project-card {
    grid-template-columns: 1fr;
  }

  .hero-avatar img {
    margin: 0 auto;
    max-width: 300px;
  }

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

@media (max-width: 760px) {
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: absolute;
    top: 72px;
    right: 4%;
    width: min(280px, 92%);
    border: 1px solid var(--border);
    background: var(--card);
    border-radius: 12px;
    padding: 0.8rem;
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
  }

  .nav.open {
    display: flex;
  }

  .theme-toggle {
    margin-left: auto;
  }

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