/* ============================================
   paullo.dev — Developer Portfolio
   Dark theme with purple/gold accents
   ============================================ */

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

:root {
  --bg-primary: #0d0d0d;
  --bg-secondary: #161618;
  --bg-card: #1c1c1f;
  --bg-card-hover: #222226;
  --text-primary: #e8e8ec;
  --text-secondary: #9a9aa8;
  --text-muted: #6b6b7b;
  --purple: #7c3aed;
  --purple-light: #a78bfa;
  --purple-dark: #2e1065;
  --purple-glow: rgba(124, 58, 237, 0.15);
  --gold: #d4a843;
  --gold-light: #f0d68a;
  --gold-dark: #b8922e;
  --border: #2a2a30;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1100px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--purple-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: 3rem; letter-spacing: -0.03em; }
h2 { font-size: 2rem; letter-spacing: -0.02em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.text-gradient {
  background: linear-gradient(135deg, var(--purple-light), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

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

.section {
  padding: 6rem 0;
}

.section-sm {
  padding: 4rem 0;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: var(--gold);
}

.nav-logo span {
  color: var(--purple-light);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--purple);
  border-radius: 1px;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: var(--transition);
  border-radius: 1px;
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--purple-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(212, 168, 67, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--purple-light);
  margin-bottom: 1.5rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: 100px;
  background: rgba(124, 58, 237, 0.08);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: 1.25rem;
  font-weight: 700;
}

.hero .subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

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

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

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

.btn-primary:hover {
  background: #6d28d9;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(124, 58, 237, 0.3);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--purple);
  transform: translateY(-1px);
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: #1a1a1a;
  font-weight: 600;
}

.btn-gold:hover {
  color: #1a1a1a;
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(212, 168, 67, 0.3);
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
}

.card:hover {
  border-color: rgba(124, 58, 237, 0.3);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* --- App Showcase --- */
.app-hero {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  align-items: center;
}

.app-icon {
  width: 140px;
  height: 140px;
  border-radius: 28px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4),
              0 0 0 1px rgba(124, 58, 237, 0.2);
}

.app-meta {
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.app-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.3rem 0.7rem;
  background: var(--bg-secondary);
  border-radius: 100px;
  border: 1px solid var(--border);
}

.app-badge svg {
  width: 14px;
  height: 14px;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  padding: 1.75rem;
}

.feature-card .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  background: var(--purple-glow);
  color: var(--purple-light);
}

.feature-card h4 {
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* Store buttons */
.store-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.8rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  transition: all var(--transition);
}

.store-btn:hover {
  border-color: var(--purple);
  background: var(--bg-card-hover);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.store-btn .store-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
  line-height: 1;
}

.store-btn .store-name {
  font-size: 1rem;
  font-weight: 600;
  display: block;
  line-height: 1.3;
}

.store-btn svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

/* --- About Page --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
  padding: 1.25rem 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gold);
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tech-tag {
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-secondary);
}

/* --- Contact Page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  transition: all var(--transition);
  margin-bottom: 1rem;
}

.contact-link:hover {
  border-color: var(--purple);
  background: var(--bg-card-hover);
  color: var(--text-primary);
  transform: translateX(4px);
}

.contact-link .contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--purple-glow);
  color: var(--purple-light);
}

.contact-link .contact-icon svg {
  width: 20px;
  height: 20px;
}

.contact-link .contact-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.contact-link .contact-value {
  font-weight: 500;
  font-size: 1rem;
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--purple);
  box-shadow: 0 0 0 3px var(--purple-glow);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* --- Divider --- */
.divider {
  height: 1px;
  background: var(--border);
  margin: 4rem 0;
}

/* Section header */
.section-header {
  margin-bottom: 3rem;
}

.section-header .label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--purple-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.section-header h2 {
  margin-bottom: 0.75rem;
}

.section-header p {
  max-width: 560px;
  font-size: 1.05rem;
}

/* --- Page header (inner pages) --- */
.page-header {
  padding: 8rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--purple-glow) 0%, transparent 70%);
  pointer-events: none;
}

.page-header h1 {
  position: relative;
  z-index: 1;
}

.page-header p {
  position: relative;
  z-index: 1;
  font-size: 1.1rem;
  max-width: 540px;
  margin-top: 1rem;
}

/* --- Utilities --- */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }

/* --- Animations --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeUp 0.6s ease-out forwards;
  opacity: 0;
}

.animate-in:nth-child(2) { animation-delay: 0.1s; }
.animate-in:nth-child(3) { animation-delay: 0.2s; }
.animate-in:nth-child(4) { animation-delay: 0.3s; }
.animate-in:nth-child(5) { animation-delay: 0.4s; }

/* --- Responsive --- */
@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.65rem; }

  .section { padding: 4rem 0; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(13, 13, 13, 0.98);
    backdrop-filter: blur(20px);
    padding: 1.5rem;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open a {
    padding: 0.75rem 0;
    font-size: 1rem;
  }
  .nav-toggle { display: block; }

  .app-hero {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }

  .app-meta { justify-content: center; }
  .store-buttons { justify-content: center; }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .hero-buttons {
    justify-content: flex-start;
  }

  .stat-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 480px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .store-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .store-btn {
    justify-content: center;
  }
}