/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --clr-bg: #0a0a0a;
  --clr-surface: #111111;
  --clr-border: #222222;
  --clr-accent: #b91c1c;
  --clr-accent-hover: #991b1b;
  --clr-text: #f5f5f5;
  --clr-muted: #888888;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
  --transition: 0.25s ease;
  --max-w: 1100px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  font-size: 1rem;
}

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

ul {
  list-style: none;
}

/* ===== Layout ===== */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
}

.section-alt {
  background: var(--clr-surface);
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 4px;
  background: var(--clr-accent);
  border-radius: 2px;
  margin: 0.6rem auto 0;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn-primary:hover {
  background: var(--clr-accent-hover);
}

.btn-outline {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: transparent;
}

.btn-outline:hover {
  background: var(--clr-accent);
  color: #fff;
}

.btn-sm {
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  border-radius: 8px;
  background: var(--clr-accent);
  color: #fff;
}

.btn-sm:hover {
  background: var(--clr-accent-hover);
}

.btn-full {
  width: 100%;
  text-align: center;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 2rem;
  background: rgba(15, 15, 19, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
  transition: background var(--transition);
}

.nav-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--clr-accent);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--clr-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 1.5rem 4rem;
  background: radial-gradient(ellipse at 60% 40%, rgba(185, 28, 28, 0.1) 0%, transparent 70%);
}

.hero-greeting {
  color: var(--clr-accent);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.hero-name {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.hero-role {
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  color: var(--clr-muted);
  font-weight: 400;
  margin-bottom: 1.2rem;
}

.hero-bio {
  color: var(--clr-muted);
  max-width: 480px;
  margin: 0 auto 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  align-items: center;
}

.avatar-placeholder {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: linear-gradient(135deg, #b91c1c, #7f1d1d);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

.about-text p {
  color: var(--clr-muted);
  margin-bottom: 1rem;
}

.about-text .btn {
  margin-top: 0.5rem;
}

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}

.skill-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-4px);
}

.skill-icon {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--clr-accent);
  background: rgba(185, 28, 28, 0.12);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.skill-card h3 {
  font-size: 1rem;
}

/* ===== Contact ===== */
.contact-email {
  text-align: center;
  color: var(--clr-muted);
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.contact-email a {
  color: var(--clr-accent);
  transition: opacity var(--transition);
}

.contact-email a:hover {
  opacity: 0.8;
}
.contact-form {
  max-width: 560px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--clr-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  color: var(--clr-text);
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--clr-accent);
}

.form-group input.invalid,
.form-group textarea.invalid {
  border-color: #ef4444;
}

.form-error {
  display: block;
  color: #ef4444;
  font-size: 0.8rem;
  margin-top: 0.3rem;
  min-height: 1em;
}

.form-success {
  text-align: center;
  color: #10b981;
  margin-top: 1rem;
  font-weight: 500;
}

.hidden {
  display: none;
}

/* ===== Footer ===== */
.footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--clr-muted);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 0.75rem;
}

.social-links a {
  color: var(--clr-muted);
  transition: color var(--transition);
}

.social-links a:hover {
  color: var(--clr-accent);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    gap: 0;
    position: fixed;
    top: 65px;
    left: 0;
    right: 0;
    background: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    padding: 1rem 0;
  }

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

  .nav-links li a {
    display: block;
    padding: 0.75rem 2rem;
  }

  .hamburger {
    display: flex;
  }

  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .avatar-placeholder {
    margin: 0 auto;
  }
}