/* ==========================================================================
   Base & Reset - Izam Portfolio (High Performance Optimized)
   ========================================================================== */
:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: #151d30;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(59, 130, 246, 0.5);
  
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.25);
  --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition: all 0.25s ease;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --nav-height: 70px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  -webkit-tap-highlight-color: transparent;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  width: 100%;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Typography & Reusables
   ========================================================================== */
.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section {
  padding: 5rem 0;
  position: relative;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title span {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.section-title h2 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.5px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  min-height: 46px;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: #1e293b;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: #334155;
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Navbar (Hardware Accelerated)
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(11, 15, 25, 0.9);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  align-items: center;
  transform: translateZ(0);
  will-change: transform;
}

.navbar.scrolled {
  background: rgba(11, 15, 25, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.35rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  padding: 0.4rem 0.2rem;
}

.nav-link:hover {
  color: var(--primary);
}

.btn-contact {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary) !important;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(59, 130, 246, 0.35);
  font-weight: 600;
}

.btn-contact:hover {
  background: var(--primary);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.45rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: calc(var(--nav-height) + 1.5rem) 0 3.5rem 0;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 1.5rem;
}

.hero-text h1 {
  font-size: clamp(2.1rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 0.5rem;
}

.hero-text h2 {
  font-size: clamp(1.2rem, 3vw, 1.65rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  min-height: 2.2rem;
}

.typed-text {
  color: var(--primary);
  border-right: 2px solid var(--primary);
  padding-right: 4px;
  animation: blink 0.75s step-end infinite;
}

@keyframes blink {
  from, to { border-color: transparent }
  50% { border-color: var(--primary); }
}

.hero-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.25rem;
}

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

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #1e293b;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 1.1rem;
  text-decoration: none;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 4px 15px var(--primary-glow);
}

/* Avatar Card */
.hero-image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.avatar-card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.avatar-img {
  width: 270px;
  height: 340px;
  object-fit: cover;
  object-position: center 20%;
  border-radius: calc(var(--radius-lg) - 4px);
  display: block;
}

.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #1e293b;
  border: 1px solid var(--border-color);
  padding: 0.6rem 0.95rem;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
  white-space: nowrap;
}

.floating-badge i {
  font-size: 1.25rem;
  color: var(--primary);
}

.floating-badge strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.floating-badge small {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.badge-1 {
  bottom: 15px;
  left: -20px;
}

.badge-2 {
  top: 20px;
  right: -20px;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: var(--radius-md);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

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

.icon-box {
  width: 48px;
  height: 48px;
  background: rgba(59, 130, 246, 0.12);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.35rem;
  margin-bottom: 1.2rem;
}

.about-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.65rem;
}

.about-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.skill-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.85rem 1.25rem;
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

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

.skill-item i {
  font-size: 2.5rem;
  margin-bottom: 0.85rem;
}

.skill-item h4 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.skill-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.75rem;
  border-radius: var(--radius-lg);
}

.contact-info h3 {
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  margin-bottom: 0.65rem;
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 1.85rem;
  line-height: 1.65;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-detail-item .icon {
  width: 44px;
  height: 44px;
  background: rgba(59, 130, 246, 0.12);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-detail-item h4 {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-detail-item p {
  margin: 0;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  background: #0b0f19;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  padding: 2.25rem 0;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

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

.footer p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #1e293b;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition);
}

.back-to-top:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ==========================================================================
   RESPONSIVE DESIGN (Tablets & Mobile)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }

  .hero-desc {
    margin: 0 auto 1.85rem;
  }

  .hero-actions {
    justify-content: center;
  }

  .social-links {
    justify-content: center;
  }

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

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

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 2.25rem;
    padding: 2.25rem;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .section {
    padding: 3.5rem 0;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: #111827;
    flex-direction: column;
    padding: 1.75rem 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    display: none;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-link {
    font-size: 1.05rem;
    width: 100%;
    text-align: center;
    padding: 0.5rem 0;
  }

  .btn-contact {
    display: inline-block;
    width: 100%;
    text-align: center;
    padding: 0.7rem 0;
  }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

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

  .about-card {
    padding: 1.6rem;
  }

  .avatar-img {
    width: 240px;
    height: 300px;
  }

  .badge-1 {
    bottom: 10px;
    left: -10px;
  }

  .badge-2 {
    top: 10px;
    right: -10px;
  }

  .contact-wrapper {
    padding: 1.6rem;
  }

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

@media (max-width: 480px) {
  .hero-actions .btn {
    width: 100%;
  }

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

  .avatar-img {
    width: 210px;
    height: 260px;
  }

  .floating-badge {
    position: static;
    margin: 0.5rem auto 0;
    width: 95%;
    justify-content: center;
  }

  .hero-image-wrapper {
    flex-direction: column;
    align-items: center;
  }
}