* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: var(--line-height-normal);
  font-size: var(--font-size-base);
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: var(--line-height-tight);
  letter-spacing: -0.03em;
  font-weight: 700;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: var(--line-height-tight);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.75rem);
  line-height: var(--line-height-tight);
  font-weight: 600;
}

p {
  color: var(--color-text-muted);
}

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

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

:where(a, button, input, textarea):focus-visible {
  outline: 2px solid color-mix(in srgb, var(--color-accent) 55%, #ffffff);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

ul {
  margin: 0;
  padding: 0;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.site-shell {
  min-height: 100vh;
}

.site-main {
  min-height: calc(100vh - 240px);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  transition: background-color var(--transition-normal), backdrop-filter var(--transition-normal), border-color var(--transition-normal);
}

.site-header.is-scrolled {
  background-color: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 65%, transparent);
}

.site-nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav__brand {
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.site-nav__brand span {
  color: var(--color-accent);
}

.site-nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  color: var(--color-text);
  cursor: pointer;
}

.site-nav__list {
  list-style: none;
  display: none;
  flex-direction: column;
  position: fixed;
  top: 76px;
  right: 0;
  left: 0;
  padding: var(--space-lg);
  gap: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  backdrop-filter: blur(12px);
}

.site-nav__list.is-open {
  display: flex;
}

.site-nav__list a {
  color: var(--color-text-muted);
  font-weight: 500;
  position: relative;
  padding-bottom: 0.25rem;
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
  background: color-mix(in srgb, var(--color-accent) 75%, #ffffff);
}

.site-nav__list a:hover,
.site-nav__list a.is-active {
  color: var(--color-text);
}

.site-nav__list a:hover::after,
.site-nav__list a.is-active::after {
  transform: scaleX(1);
}

.hero {
  position: relative;
  overflow: hidden;
}

.hero--gradient {
  padding: 10rem 0 6rem;
  background: linear-gradient(140deg, var(--color-gradient-a), var(--color-gradient-b) 48%, var(--color-gradient-c));
}

.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.35;
  pointer-events: none;
}

.hero__glow--left {
  width: 320px;
  height: 320px;
  top: 8%;
  left: -60px;
  background: #7c3aed;
}

.hero__glow--right {
  width: 380px;
  height: 380px;
  bottom: -80px;
  right: -40px;
  background: #2563eb;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 880px;
}

.hero__kicker {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-accent-hover);
}

.hero__subtitle {
  margin-top: var(--space-lg);
  background: linear-gradient(90deg, #c4b5fd 0%, #93c5fd 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__description {
  margin: var(--space-xl) auto 0;
  max-width: 760px;
  font-size: var(--font-size-lg);
}

.hero__actions {
  margin-top: var(--space-2xl);
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  padding: 0.85rem 1.75rem;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.button--primary {
  background: #7c3aed;
  color: #f8fafc;
  box-shadow: var(--shadow-lg);
}

.button--primary:hover {
  background: #6d28d9;
  color: #f8fafc;
  transform: translateY(-2px) scale(1.02);
}

.button--ghost {
  border-color: #a78bfa;
  color: #c4b5fd;
  background: transparent;
}

.button--ghost:hover {
  background: color-mix(in srgb, #7c3aed 18%, transparent);
}

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

.hero__social {
  list-style: none;
  margin-top: var(--space-2xl);
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
}

.hero__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  color: var(--color-accent);
  transition: all var(--transition-fast);
  border: 1px solid color-mix(in srgb, var(--color-accent) 30%, transparent);
}

.hero__social a:hover {
  background: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--color-accent) 30%, transparent);
}

.hero__social a svg {
  width: 20px;
  height: 20px;
}

.section-dark,
.section-light {
  padding: 6rem 0;
}

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

.section-light {
  background: color-mix(in srgb, var(--color-surface-alt) 55%, var(--color-bg));
}

.section-header {
  margin-bottom: var(--space-2xl);
  text-align: center;
}

.section-header p {
  margin-top: var(--space-sm);
  font-size: var(--font-size-lg);
}

.page-hero {
  padding: 9rem 0 4rem;
}

.page-hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  text-align: center;
}

.page-hero p {
  margin: var(--space-md) auto 0;
  max-width: 760px;
  text-align: center;
  font-size: var(--font-size-lg);
}

.page-hero--dark {
  background: linear-gradient(140deg, var(--color-gradient-a), #1d4ed8 60%, var(--color-gradient-c));
}

.page-hero--light {
  background: color-mix(in srgb, var(--color-surface-alt) 65%, var(--color-bg));
}

.page-hero--gradient {
  background: linear-gradient(140deg, var(--color-gradient-a), var(--color-gradient-b) 50%, var(--color-gradient-c));
}

/* About Hero */
.about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.about-hero__image {
  width: 100%;
  max-width: 360px;
  margin: 0 auto;
}

.about-hero__image img {
  width: 100%;
  height: auto;
  border-radius: 50%;
  border: 4px solid var(--color-accent);
  box-shadow: var(--shadow-lg);
  display: block;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.about-hero__content h1 {
  text-align: left;
  margin-bottom: var(--space-lg);
}

.about-hero__content p {
  margin-bottom: var(--space-md);
  max-width: none;
  text-align: left;
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
}

.about-hero__content p:last-child {
  margin-bottom: 0;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.project-card {
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-border));
  box-shadow: var(--shadow-md);
}

.project-card--featured {
  border-color: color-mix(in srgb, var(--color-accent) 35%, var(--color-border));
}

.project-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.project-card__image {
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card__image {
  transform: scale(1.06);
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, color-mix(in srgb, var(--color-bg) 70%, transparent));
}

.project-card__body {
  padding: var(--space-xl);
}

.project-card__title {
  font-size: var(--font-size-xl);
}

.project-card__tagline {
  margin-top: var(--space-sm);
}

.project-card__tech {
  margin-top: var(--space-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.project-card__links {
  margin-top: var(--space-lg);
  display: flex;
  gap: var(--space-lg);
}

.project-card__link {
  color: var(--color-text-muted);
  font-weight: 500;
}

.project-card__link--accent {
  color: var(--color-accent-hover);
}

.skill-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-accent) 16%, transparent);
  color: color-mix(in srgb, var(--color-accent-hover) 80%, white);
  border: 1px solid color-mix(in srgb, var(--color-accent) 22%, var(--color-border));
  font-size: var(--font-size-sm);
}

.skills-overview {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.skills-category {
  background: linear-gradient(160deg, color-mix(in srgb, var(--color-surface-alt) 70%, transparent), color-mix(in srgb, var(--color-surface) 88%, transparent));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.skills-category:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--color-accent) 30%, var(--color-border));
}

.skills-category h3 {
  margin-bottom: var(--space-md);
}

.skills-category__items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.experience-item {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: var(--space-xl);
}

.experience-item + .experience-item {
  margin-top: var(--space-lg);
}

.experience-item__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.experience-item__header p {
  font-size: var(--font-size-sm);
  color: var(--color-accent-hover);
}

.experience-item__dot {
  color: var(--color-text-muted);
  font-weight: 400;
}

.experience-item ul {
  margin-top: var(--space-md);
  padding-left: 1.2rem;
}

.experience-item li {
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.project-detail {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
}

.project-detail__tagline {
  margin-top: var(--space-md);
  font-size: var(--font-size-lg);
}

.project-detail__image {
  margin: var(--space-xl) 0;
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--color-border) 65%, transparent);
}

.project-detail__tech {
  margin-top: var(--space-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.project-detail__links {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid color-mix(in srgb, var(--color-border) 70%, transparent);
}

.project-detail__links ul {
  list-style: none;
  display: grid;
  gap: var(--space-sm);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.contact-card,
.contact-form {
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: var(--space-xl);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.contact-card:hover,
.contact-form:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--color-accent) 28%, var(--color-border));
}

.contact-card h2 {
  margin-bottom: var(--space-md);
}

.contact-list {
  list-style: none;
  margin-top: var(--space-lg);
  display: grid;
  gap: var(--space-md);
}

.contact-list li {
  display: grid;
  gap: 0.15rem;
}

.contact-list span {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.contact-form {
  display: grid;
  gap: var(--space-sm);
}

.contact-form label {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-top: var(--space-sm);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface-alt) 70%, transparent);
  color: var(--color-text);
  padding: 0.75rem 0.9rem;
  font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--color-accent) 42%, transparent);
  outline-offset: 1px;
}

/* Flash messages */
.flash-messages {
  margin-bottom: var(--space-lg);
}

.flash-message {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
  border-left: 4px solid;
}

.flash-message--success {
  background: color-mix(in srgb, #10b981 15%, var(--color-surface));
  border-color: #10b981;
  color: #d1fae5;
}

.flash-message--error {
  background: color-mix(in srgb, #ef4444 15%, var(--color-surface));
  border-color: #ef4444;
  color: #fee2e2;
}

/* Form validation */
.form-group {
  margin-bottom: var(--space-md);
}

.form-control {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface-alt) 70%, transparent);
  color: var(--color-text);
  padding: 0.75rem 0.9rem;
  font: inherit;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: 2px solid color-mix(in srgb, var(--color-accent) 42%, transparent);
  outline-offset: 1px;
  border-color: var(--color-accent);
}

.form-control.is-invalid {
  border-color: #ef4444;
  background: color-mix(in srgb, #ef4444 8%, var(--color-surface-alt));
}

.form-control.is-invalid:focus {
  outline-color: color-mix(in srgb, #ef4444 42%, transparent);
}

.invalid-feedback {
  color: #fca5a5;
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  display: block;
}

.form-notice {
  margin-top: var(--space-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-align: center;
}

.site-footer {
  border-top: 1px solid color-mix(in srgb, var(--color-border) 75%, transparent);
  padding: var(--space-2xl) 0;
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
}

.site-footer__inner {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.site-footer__inner p {
  font-size: var(--font-size-sm);
}

.site-footer__social {
  list-style: none;
  display: flex;
  gap: var(--space-lg);
}

.site-footer__social a {
  color: var(--color-text-muted);
}

.site-footer__social a:hover {
  color: var(--color-text);
}

@media (min-width: 768px) {
  .site-nav__toggle {
    display: none;
  }

  .site-nav__list {
    position: static;
    display: flex;
    flex-direction: row;
    background: transparent;
    border: 0;
    padding: 0;
    gap: var(--space-xl);
    backdrop-filter: none;
  }

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

  .about-hero {
    grid-template-columns: 300px 1fr;
    gap: 4rem;
  }

  .about-hero__image {
    max-width: 300px;
  }

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

  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .experience-item__header {
    flex-direction: row;
    justify-content: space-between;
    align-items: start;
  }
}

@media (max-width: 640px) {
  .hero--gradient {
    padding: 8.25rem 0 4.75rem;
  }

  .hero__glow--left,
  .hero__glow--right {
    opacity: 0.24;
    filter: blur(56px);
  }

  .hero__social {
    gap: var(--space-lg);
    flex-wrap: wrap;
  }

  .section-dark,
  .section-light,
  .page-hero {
    padding-top: 5rem;
    padding-bottom: 4rem;
  }
}

@media (min-width: 1024px) {
  .project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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