@import url('https://fonts.googleapis.com/css2?family=Geist:wght@100..900&display=swap');

/* ─── CSS Variables ─── */
:root {
  --background: hsl(0, 0%, 98%);
  --foreground: hsl(222.2, 47%, 11.2%);
  --card: rgba(255, 255, 255, 0.7);
  --card-foreground: hsl(222.2, 47%, 11.2%);
  --primary: hsl(250, 90%, 60%);
  --gradient-primary: linear-gradient(135deg, hsl(250, 90%, 65%), hsl(320, 90%, 60%), hsl(210, 90%, 60%), hsl(250, 90%, 65%));
  --primary-foreground: hsl(0, 0%, 100%);
  --secondary: rgba(230, 235, 245, 0.5);
  --secondary-foreground: hsl(222.2, 47%, 11.2%);
  --muted: hsl(210, 40%, 96.1%);
  --muted-foreground: hsl(215.4, 16.3%, 46.9%);
  --border: rgba(0, 0, 0, 0.08);
  --input: rgba(0, 0, 0, 0.05);
  --ring: hsl(250, 90%, 60%);
  --radius: 1rem;
  --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.05);
}

.dark {
  --background: hsl(230, 25%, 5%);
  --foreground: hsl(210, 40%, 98%);
  --card: rgba(20, 20, 30, 0.4);
  --card-foreground: hsl(210, 40%, 98%);
  --primary: hsl(250, 100%, 75%);
  --gradient-primary: linear-gradient(135deg, hsl(250, 100%, 75%), hsl(320, 100%, 70%), hsl(190, 100%, 70%), hsl(250, 100%, 75%));
  --primary-foreground: hsl(222, 47%, 11%);
  --secondary: rgba(255, 255, 255, 0.05);
  --secondary-foreground: hsl(210, 40%, 98%);
  --muted: hsl(217.2, 32.6%, 12%);
  --muted-foreground: hsl(215, 20.2%, 65%);
  --border: rgba(255, 255, 255, 0.08);
  --input: rgba(255, 255, 255, 0.05);
  --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

/* ─── Reset & Base ─── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-color: var(--border);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Geist', sans-serif;
  background: var(--background);
  color: var(--foreground);
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
  animation: pageLoad 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--primary) 12%, transparent), transparent 30%),
    radial-gradient(circle at 70% 30%, color-mix(in srgb, hsl(320, 100%, 60%) 10%, transparent), transparent 25%);
  z-index: -1;
  pointer-events: none;
  animation: bgOrbit 30s linear infinite;
}

@keyframes bgOrbit {
  0% {
    transform: rotate(0deg) scale(1);
  }

  50% {
    transform: rotate(180deg) scale(1.1);
  }

  100% {
    transform: rotate(360deg) scale(1);
  }
}

@keyframes pageLoad {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

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

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: hsl(217, 91%, 60%, 0.3);
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--background);
}

::-webkit-scrollbar-thumb {
  background: hsl(217, 91%, 60%, 0.2);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: hsl(217, 91%, 60%, 0.4);
}

/* ─── Layout ─── */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── Navbar ─── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: 4rem;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--background) 80%, transparent);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
}

.nav-links a {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--foreground);
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0%;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary);
  transition: width 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.nav-links a:hover::after {
  width: 100%;
}

#theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 9999px;
  color: var(--foreground);
  transition: background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

#theme-toggle:hover {
  background: var(--secondary);
}

#theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ─── Main content ─── */
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── Reveal animation ─── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* ─── Section divider ─── */
.section-divider {
  border-top: 1px solid var(--border);
}

/* ─── Card surface ─── */
.card-surface {
  background: var(--card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  transition: transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1),
    box-shadow 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.card-surface:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
}

.dark .card-surface:hover {
  box-shadow: 0 10px 30px -10px rgba(255, 255, 255, 0.05);
}

/* ─── Section label ─── */
.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 3rem;
  background: var(--gradient-primary);
  background-size: 300% 300%;
  animation: gradientShift 8s ease infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

/* ─── Hero ─── */
#hero {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 8rem;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 768px) {
  .hero-inner {
    flex-direction: row;
  }
}

.hero-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  width: fit-content;
}

.hero-name {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  background: var(--gradient-primary);
  background-size: 300% 300%;
  animation: gradientShift 8s ease infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  padding-bottom: 0.1em;
  /* Prevent clipping */
}

.hero-bio {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  max-width: 45ch;
  line-height: 1.65;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1rem;
}

.btn-primary {
  position: relative;
  overflow: hidden;
  z-index: 1;
  padding: 0.85rem 1.75rem;
  background: var(--gradient-primary);
  background-size: 300% 300%;
  animation: gradientShift 8s ease infinite;
  color: var(--primary-foreground);
  border-radius: 9999px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
  z-index: -1;
}

.btn-primary:hover {
  opacity: 0.9;
  box-shadow: 0 4px 14px 0 color-mix(in srgb, var(--primary) 40%, transparent);
  transform: translateY(-2px);
}

.btn-primary:hover::after {
  transform: translateX(100%);
}

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

.btn-secondary {
  padding: 0.75rem 1.5rem;
  background: var(--secondary);
  color: var(--secondary-foreground);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-weight: 500;
  transition: background 0.2s, transform 0.2s;
}

.btn-secondary:hover {
  background: var(--muted);
  transform: translateY(-2px);
}

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

.hero-image-wrap {
  position: relative;
  width: 16rem;
  height: 16rem;
  flex-shrink: 0;
  perspective: 1000px;
}

@media (min-width: 768px) {
  .hero-image-wrap {
    width: 20rem;
    height: 20rem;
  }
}

.hero-image-bg {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--primary) 20%, transparent);
  border-radius: var(--radius);
  transform: rotate(3deg);
  animation: floatBg 6s ease-in-out infinite;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

@keyframes floatBg {

  0%,
  100% {
    transform: rotate(3deg) translateY(0);
  }

  50% {
    transform: rotate(3deg) translateY(-15px);
  }
}

.hero-image-wrap:hover .hero-image-bg {
  transform: rotate(6deg) scale(1.05);
}

.hero-image-frame {
  position: absolute;
  inset: 0;
  background: var(--secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.hero-image-wrap:hover .hero-image-frame {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.2);
}

.dark .hero-image-wrap:hover .hero-image-frame {
  box-shadow: 0 20px 40px -10px rgba(255, 255, 255, 0.1);
}

.hero-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.hero-image-wrap:hover .hero-image-frame img {
  transform: scale(1.05);
}

/* ─── About ─── */
#about {
  padding: 6rem 0;
}

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

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.about-grid p {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--muted-foreground);
}

/* ─── Skills ─── */
#skills {
  padding: 6rem 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 768px) {
  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.skill-card {
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.skill-card:hover {
  border-color: color-mix(in srgb, var(--primary) 50%, transparent);
}

.skill-category {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.skill-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-top: 0.5rem;
}

/* ─── Education ─── */
#education {
  padding: 6rem 0;
}

.edu-grid {
  display: grid;
  gap: 6rem;
}

@media (min-width: 768px) {
  .edu-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  padding-left: 2rem;
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  border: 4px solid var(--background);
  background: var(--muted-foreground);
  opacity: 0.3;
}

.timeline-dot.current {
  background: var(--primary);
  opacity: 1;
}

.timeline-year {
  font-size: 0.875rem;
  font-family: monospace;
  color: var(--muted-foreground);
}

.timeline-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 0.25rem;
}

.timeline-place {
  color: var(--muted-foreground);
}

.achievement-card {
  padding: 1.5rem;
}

.achievement-title {
  font-weight: 700;
}

.achievement-sub {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-top: 0.25rem;
}

.achievements-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ─── Projects ─── */
#projects {
  padding: 6rem 0;
}

.projects-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3rem;
}

.projects-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
}

.projects-link:hover {
  text-decoration: underline;
}

.projects-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.project-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
  text-decoration: none;
}

.project-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.project-name {
  font-weight: 700;
  transition: color 0.2s;
}

.project-card:hover .project-name {
  color: var(--primary);
}

.project-stars {
  font-size: 0.75rem;
  font-family: monospace;
  color: var(--muted-foreground);
}

.project-desc {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-lang {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.lang-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--primary);
}

.lang-name {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted-foreground);
}

.project-skeleton {
  height: 8rem;
  background: var(--secondary);
  border-radius: var(--radius);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

/* ─── Contact ─── */
#contact {
  padding: 6rem 0;
}

.contact-grid {
  display: grid;
  gap: 6rem;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-headline {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 2rem;
  background: var(--gradient-primary);
  background-size: 300% 300%;
  animation: gradientShift 8s ease infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-email {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-radius: 0.5rem;
  background: var(--secondary);
  transition: background 0.2s;
}

.contact-email:hover {
  background: var(--muted);
}

.contact-email-label {
  color: var(--muted-foreground);
  font-size: 0.875rem;
}

.contact-email-value {
  font-weight: 500;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  flex: 1;
  padding: 1rem;
  border-radius: 0.5rem;
  background: var(--secondary);
  text-align: center;
  font-weight: 500;
  font-size: 0.875rem;
  transition: background 0.2s;
}

.social-link:hover {
  background: var(--muted);
}

/* ─── Contact Form ─── */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-input,
.form-textarea {
  width: 100%;
  background: var(--secondary);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--foreground);
  outline: none;
  transition: box-shadow 0.2s;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--muted-foreground);
}

.form-input:focus,
.form-textarea:focus {
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 50%, transparent);
}

.form-textarea {
  resize: vertical;
}

.btn-submit {
  width: 100%;
  padding: 1rem;
  background: var(--primary);
  color: var(--primary-foreground);
  border: none;
  border-radius: 0.5rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}

.btn-submit:hover {
  opacity: 0.9;
}

.btn-submit:active {
  transform: scale(0.98);
}

/* ─── Toast ─── */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--foreground);
  color: var(--background);
  padding: 0.75rem 1.25rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.3s, transform 0.3s;
  z-index: 100;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Footer ─── */
footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

footer p+p {
  margin-top: 0.5rem;
}