:root {
  --bg: #020617;
  --bg-elevated: #020617;
  --bg-soft: #020617;
  --surface: #020617;
  --surface-alt: #020617;
  --border-subtle: #1f2937;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.12);
  --accent-strong: #06b6d4;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --text-soft: #6b7280;
  --danger: #f97373;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 999px;
  --shadow-soft: 0 24px 60px rgba(15, 23, 42, 0.8);
  --shadow-subtle: 0 18px 40px rgba(15, 23, 42, 0.7);
  --nav-height: 72px;
}

/* RESET */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: radial-gradient(circle at top, #0f172a 0, #020617 55%, #000 100%);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

/* UTILITIES */

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
}

.section-alt {
  padding: 6rem 0;
  background: radial-gradient(circle at top, #0b1220, #020617 60%);
}

.section-title {
  font-size: clamp(1.9rem, 2.4vw, 2.3rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}

.section-title.center {
  text-align: center;
}

.section-subtitle {
  max-width: 32rem;
  margin: 0.25rem auto 3rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  text-align: center;
}

/* NAVBAR */

.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    rgba(2, 6, 23, 0.95),
    rgba(2, 6, 23, 0.6),
    transparent
  );
  border-bottom: 1px solid rgba(15, 23, 42, 0.8);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 30%;
  background: conic-gradient(from 180deg, #22d3ee, #38bdf8, #6366f1, #22d3ee);
  padding: 2px;
  position: relative;
}

.brand-mark::after {
  content: "";
  inset: 2px;
  border-radius: inherit;
  position: absolute;
  background: #020617;
}

.brand-text {
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-main);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.9rem;
}

.nav-links a {
  position: relative;
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #38bdf8, #6366f1);
  transition: width 0.25s ease;
}

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

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

.nav-toggle {
  display: none;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.8);
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  cursor: pointer;
}

.nav-toggle span {
  width: 18px;
  height: 1.5px;
  border-radius: 999px;
  background: var(--text-main);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* HERO */

.hero {
  padding-top: 5.5rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.4fr);
  gap: 3.5rem;
  align-items: center;
}

.hero-kicker {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent-strong);
  margin-bottom: 0.75rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 4vw, 3rem);
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.hero h1 span {
  background: linear-gradient(120deg, #38bdf8, #818cf8, #22c55e);
  -webkit-background-clip: text;
  color: transparent;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
  max-width: 32rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin: 1.8rem 0 1.4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  padding: 0.7rem 1.35rem;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.15s ease,
    box-shadow 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  cursor: pointer;
}

.btn.primary {
  background: radial-gradient(circle at top left, #38bdf8, #6366f1);
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.6);
  color: #0b1020;
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 24px 50px rgba(37, 99, 235, 0.75);
}

.btn.ghost {
  background: rgba(15, 23, 42, 0.7);
  border-color: rgba(148, 163, 184, 0.4);
  color: var(--text-main);
}

.btn.ghost:hover {
  background: rgba(15, 23, 42, 0.9);
  border-color: rgba(148, 163, 184, 0.7);
}

.btn.full {
  width: 100%;
}

.hero-social {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text-soft);
  font-size: 0.83rem;
}

.hero-social a {
  width: 30px;
  height: 30px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--text-muted);
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease,
    border-color 0.2s ease;
}

.hero-social a:hover {
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-color: rgba(56, 189, 248, 0.7);
  transform: translateY(-1px);
}

/* Hero card */

.hero-card {
  border-radius: 28px;
  background: radial-gradient(circle at top left, #0f172a, #020617 60%);
  border: 1px solid rgba(30, 64, 175, 0.6);
  box-shadow: var(--shadow-soft);
  padding: 1.6rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  min-height: 280px;
}

.hero-avatar {
  width: 84px;
  height: 84px;
  border-radius: 28px;
  background: conic-gradient(from 130deg, #38bdf8, #a855f7, #22c55e, #38bdf8);
  padding: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-avatar span {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: #020617;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.3rem;
  letter-spacing: 0.08em;
}

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.hero-meta h2 {
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.hero-meta p {
  font-size: 0.84rem;
  color: var(--text-soft);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.hero-tags span {
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: rgba(30, 64, 175, 0.5);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--text-muted);
}

/* ABOUT */

.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(0, 2.1fr);
  gap: 3rem;
  align-items: start;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
}

.about-card {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(30, 64, 175, 0.6);
  background: radial-gradient(circle at top left, #0f172a, #020617 70%);
  padding: 1.1rem 1.2rem;
  font-size: 0.9rem;
  box-shadow: var(--shadow-subtle);
}

.about-card h3 {
  font-size: 0.95rem;
  margin-bottom: 0.6rem;
}

.about-card ul {
  list-style: none;
  display: grid;
  gap: 0.25rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* SKILLS */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.skill-group {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(30, 64, 175, 0.6);
  background: radial-gradient(circle at top, #020617, #020617);
  padding: 1.2rem 1.25rem 1.15rem;
  box-shadow: var(--shadow-subtle);
}

.skill-group h3 {
  font-size: 0.98rem;
  margin-bottom: 0.4rem;
}

.skill-group ul {
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: grid;
  gap: 0.25rem;
}

/* PROJECTS */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.6rem;
  margin-top: 2.5rem;
}

.project-card {
  border-radius: 22px;
  border: 1px solid rgba(30, 64, 175, 0.6);
  background: radial-gradient(circle at top left, #020617, #020617 65%);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-subtle);
}

.project-thumb {
  height: 160px;
  background-size: cover;
  background-position: center;
}

.skeleton {
  background-image: linear-gradient(
    120deg,
    rgba(148, 163, 184, 0.08),
    rgba(148, 163, 184, 0.16),
    rgba(148, 163, 184, 0.08)
  );
  animation: shimmer 1.8s infinite linear;
  background-size: 200% 100%;
}

@keyframes shimmer {
  0% {
    background-position: 0% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.project-body {
  padding: 1.1rem 1.1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.project-body h3 {
  font-size: 1rem;
}

.project-body p {
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.project-meta span {
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--text-soft);
}

.project-links {
  margin-top: 0.4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
}

.project-links a {
  text-decoration: none;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

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

/* CONTACT */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.6fr);
  gap: 3rem;
  align-items: flex-start;
}

.contact-info {
  margin-top: 1.4rem;
  display: grid;
  gap: 0.7rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.contact-info div {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.contact-info i {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-form {
  border-radius: 22px;
  border: 1px solid rgba(30, 64, 175, 0.7);
  background: radial-gradient(circle at top left, #020617, #020617 70%);
  padding: 1.4rem 1.4rem 1.2rem;
  box-shadow: var(--shadow-subtle);
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.83rem;
  color: var(--text-soft);
}

.field input,
.field textarea {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(30, 64, 175, 0.9);
  padding: 0.6rem 0.75rem;
  font-size: 0.88rem;
  background: rgba(15, 23, 42, 0.9);
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.field input::placeholder,
.field textarea::placeholder {
  color: rgba(148, 163, 184, 0.7);
}

.field input:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.4);
}

.field textarea {
  resize: vertical;
}

.form-note {
  margin-top: 0.6rem;
  font-size: 0.75rem;
  color: var(--text-soft);
}

/* FOOTER */

.footer {
  border-top: 1px solid rgba(15, 23, 42, 0.9);
  padding: 1.2rem 0 1.4rem;
  background: radial-gradient(circle at bottom, #020617, #000);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-soft);
}

.footer-social {
  display: flex;
  gap: 0.5rem;
}

.footer-social a {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease,
    border-color 0.2s ease;
}

.footer-social a:hover {
  background: var(--accent-soft);
  color: var(--accent-strong);
  transform: translateY(-1px);
  border-color: rgba(56, 189, 248, 0.7);
}

/* REVEAL ANIMATION */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.delay-1 {
  transition-delay: 0.12s;
}

.delay-2 {
  transition-delay: 0.24s;
}

/* RESPONSIVE */

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.8fr);
  }

  .hero-card {
    order: -1;
  }

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

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

  .projects-grid {
    gap: 1.3rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: absolute;
    inset: calc(var(--nav-height) + 8px) 1.5rem auto;
    background: rgba(15, 23, 42, 0.98);
    border-radius: 18px;
    border: 1px solid rgba(30, 64, 175, 0.9);
    padding: 0.7rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.9);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
  }

  .nav-links.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 4rem;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-social {
    flex-wrap: wrap;
  }

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