:root {
  --bg: #0f172a;
  --bg-soft: #111c33;
  --surface: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #38bdf8;
  --primary-dark: #0ea5e9;
  --radius: 14px;
  --shadow: 0 10px 25px rgba(15, 23, 42, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, #020617 100%);
  color: var(--text);
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}

.logo {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 1.2rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #ffffff;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(148, 163, 184, 0.3);
  color: var(--text);
  border-radius: 10px;
  padding: 0.2rem 0.55rem;
  font-size: 1.1rem;
}

.hero {
  padding: 4rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.badge {
  display: inline-block;
  background: rgba(56, 189, 248, 0.14);
  color: #7dd3fc;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem;
}

h1 {
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  line-height: 1.2;
  margin: 0.8rem 0 1rem;
}

h2 {
  font-size: clamp(1.55rem, 3.2vw, 2.2rem);
  margin: 0 0 0.55rem;
}

h3 {
  margin-top: 0;
  margin-bottom: 0.7rem;
}

.hero-text,
.section-lead {
  color: var(--muted);
  max-width: 62ch;
}

.hero-actions {
  margin-top: 1.4rem;
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.button {
  text-decoration: none;
  border: none;
  cursor: pointer;
  padding: 0.75rem 1.15rem;
  border-radius: 10px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--primary);
  color: #022c42;
}

.button-primary:hover {
  background: var(--primary-dark);
}

.button-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.hero-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: rgba(17, 28, 51, 0.56);
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

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

.card,
.project-card,
.contact-form {
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: var(--radius);
  padding: 1.1rem;
}

.project-card p {
  color: var(--muted);
}

.project-card a {
  color: #7dd3fc;
  text-decoration: none;
  font-weight: 600;
}

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

.skills-grid {
  margin-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.skills-grid span {
  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  color: #dbeafe;
  background: rgba(30, 41, 59, 0.55);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 1.2rem;
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 0.55rem;
}

label {
  font-weight: 600;
  font-size: 0.95rem;
}

input,
textarea {
  width: 100%;
  padding: 0.75rem;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(15, 23, 42, 0.8);
  color: var(--text);
  font-family: inherit;
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(56, 189, 248, 0.3);
  border-color: var(--primary);
}

.form-notice {
  min-height: 1.2rem;
  margin: 0.2rem 0 0;
  color: #7dd3fc;
  font-size: 0.95rem;
}

.site-footer {
  padding: 1.3rem 0 2rem;
  text-align: center;
  color: var(--muted);
}

@media (max-width: 920px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 680px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    right: 4%;
    display: none;
    flex-direction: column;
    background: #020617;
    border: 1px solid rgba(148, 163, 184, 0.22);
    padding: 0.8rem;
    border-radius: 12px;
    min-width: 180px;
  }

  .nav-links.open {
    display: flex;
  }

  .about-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }
}