:root {
  --color-hero-start: #0f1419;
  --color-hero-end: #1a2332;
  --color-bg: #f8fafc;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-on-dark: #f1f5f9;
  --color-text-on-dark-muted: #94a3b8;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-accent-soft: rgba(59, 130, 246, 0.12);
  --color-border: #e2e8f0;
  --font-sans: 'DM Sans', system-ui, -apple-system, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-pill: 9999px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 24px rgba(15, 23, 42, 0.08);
  --max-width-text: 42rem;
  --max-width-wide: 56rem;
  --max-width-hero: 72rem;
  --transition: 0.2s ease;
  --photo-size: clamp(200px, 28vw, 320px);
}

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

html {
  scroll-behavior: smooth;
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Hero */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100vh;
  padding: var(--space-xl) clamp(1.5rem, 6vw, 5rem);
  color: var(--color-text-on-dark);
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(59, 130, 246, 0.15), transparent),
    linear-gradient(160deg, var(--color-hero-start) 0%, var(--color-hero-end) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent);
  pointer-events: none;
}

.hero__layout {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  width: 100%;
  max-width: var(--max-width-hero);
  margin: 0 auto;
}

.hero__inner {
  flex: 1;
  min-width: 0;
  max-width: var(--max-width-text);
  animation: fade-up 0.7s ease both;
}

.hero__photo {
  flex-shrink: 0;
  margin: 0;
  animation: fade-up 0.7s ease 0.1s both;
}

.hero__photo img {
  display: block;
  width: var(--photo-size);
  height: var(--photo-size);
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid rgba(59, 130, 246, 0.4);
  box-shadow:
    0 0 0 1px rgba(148, 163, 184, 0.15),
    0 16px 48px rgba(0, 0, 0, 0.35);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

.hero__eyebrow {
  margin: 0 0 var(--space-sm);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.hero__title {
  margin: 0 0 var(--space-md);
  font-size: clamp(2.25rem, 5vw + 1rem, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero__lead {
  margin: 0 0 var(--space-lg);
  max-width: 36ch;
  font-size: clamp(1.0625rem, 1.5vw + 0.75rem, 1.25rem);
  color: var(--color-text-on-dark-muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.25;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition:
    background-color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

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

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}

@media (prefers-reduced-motion: no-preference) {
  .btn--primary:hover {
    transform: translateY(-1px);
  }

  .btn--primary:active {
    transform: translateY(0);
  }
}

.btn--primary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.btn--primary:visited {
  color: #fff;
}

.btn--ghost {
  color: var(--color-text-on-dark);
  background: transparent;
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.btn--ghost:hover {
  background: rgba(148, 163, 184, 0.12);
  border-color: rgba(148, 163, 184, 0.6);
}

.btn--ghost:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.btn--ghost:visited {
  color: var(--color-text-on-dark);
}

/* Contact */
.contact {
  flex: 1;
  padding: var(--space-2xl) clamp(1.5rem, 6vw, 5rem);
}

.contact__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  text-align: center;
  animation: fade-up 0.7s ease 0.15s both;
}

.contact__title {
  margin: 0 0 var(--space-md);
  font-size: clamp(1.75rem, 3vw + 1rem, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.contact__text {
  margin: 0 auto var(--space-lg);
  max-width: var(--max-width-text);
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

/* Skills */
.skills {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.skills__title {
  margin: 0 0 var(--space-md);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.skills__tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs);
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.tag {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-accent-soft);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-pill);
}

/* Footer */
.footer {
  padding: var(--space-lg) clamp(1.5rem, 6vw, 5rem);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

.footer p {
  margin: 0;
}

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

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

.footer a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .hero {
    align-items: flex-end;
    padding-bottom: var(--space-xl);
  }

  .hero__layout {
    flex-direction: column-reverse;
    align-items: flex-start;
    gap: var(--space-lg);
  }

  .hero__photo {
    align-self: center;
  }

  .hero__inner {
    padding-bottom: var(--space-sm);
  }

  .contact {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .skills {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
  }
}