/* ==========================================================================
   PORTOFOLIO MAHASISWA ADKSP - POLITEKNIK KEUANGAN NEGARA STAN
   Aturan:
   - 1 Warna aksen: #0b5fa5
   - Font sistem, tanpa dependensi eksternal (No CDN / No Google Fonts)
   - Aksesibilitas WCAG AA (Kontras >= 4.5:1, Target Sentuh >= 44px)
   - Responsif 375px - 1440px tanpa horizontal scroll
   ========================================================================== */

:root {
  --primary: #0b5fa5;
  --primary-dark: #074375;
  --primary-light: #e8f1f8;
  --primary-border: #bfdbfe;
  
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-alt: #f1f5f9;
  
  --text-main: #0f172a;
  --text-muted: #334155;
  --text-light: #64748b;
  
  --border-color: #e2e8f0;
  --border-card: #cbd5e1;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Aksesibilitas: Outline Fokus Keyboard */
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
}

/* Navigasi */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 68px;
}

.brand-link {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
}

.brand-badge {
  font-size: 0.75rem;
  font-weight: 600;
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--primary-border);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 8px;
  align-items: center;
}

.nav-item a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  min-width: 44px;
  padding: 8px 14px;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.nav-item a:hover {
  color: var(--primary);
  background-color: var(--primary-light);
}

/* Kontainer Utama */
.main-wrapper {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Seksi Global */
.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border-color);
}

.section:last-of-type {
  border-bottom: none;
}

.section-header {
  margin-bottom: 40px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  border: 1px solid var(--primary-border);
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-top: 6px;
  max-width: 680px;
}

/* ==========================================================================
   Seksi 1: Profil (Hero)
   ========================================================================== */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  align-items: center;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-main);
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.4;
  margin-bottom: 18px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 32px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.15s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--text-main);
  border-color: var(--border-card);
}

.btn-secondary:hover {
  background-color: var(--bg-alt);
  color: var(--primary);
  border-color: var(--primary);
}

.hero-photo-wrapper {
  text-align: center;
}

.profile-img {
  width: 260px;
  height: 260px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid #ffffff;
  box-shadow: var(--shadow-lg);
  display: inline-block;
  background-color: var(--bg-alt);
}

/* ==========================================================================
   Seksi 2: Keahlian
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 24px;
}

.skill-card {
  background-color: var(--bg-card);
  padding: 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.skill-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-border);
}

.skill-category {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.skill-pill {
  font-size: 0.85rem;
  font-weight: 500;
  background-color: var(--bg-alt);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

/* ==========================================================================
   Seksi 3: Proyek Analitika Data
   ========================================================================== */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.project-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: grid;
  grid-template-columns: 460px 1fr;
  transition: border-color 0.2s ease;
}

.project-card:hover {
  border-color: var(--primary-border);
}

.project-visual {
  background-color: #0f172a;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}

.project-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-content {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.project-header-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  flex-wrap: wrap;
  gap: 8px;
}

.project-badge {
  font-size: 0.75rem;
  font-weight: 700;
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.project-period {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
}

.project-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 12px;
}

.project-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* Hasil Terukur (Highlight) */
.metrics-box {
  background-color: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 20px;
}

.metrics-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.metrics-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-value {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.metric-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.project-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  font-size: 0.85rem;
  background-color: var(--bg-alt);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.spec-item strong {
  display: block;
  color: var(--text-main);
}

.spec-item span {
  color: var(--text-muted);
}

.project-conclusion {
  font-size: 0.9rem;
  font-style: italic;
  color: var(--text-muted);
  border-top: 1px dashed var(--border-card);
  padding-top: 12px;
  margin-bottom: 20px;
}

.project-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Seksi 4: Unduhan CV
   ========================================================================== */
.cv-box {
  background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 100%);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-lg);
  padding: 44px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-md);
  gap: 32px;
}

.cv-info h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.cv-info p {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 600px;
}

/* ==========================================================================
   Seksi 5: Kontak & Kanal Profesional
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.contact-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 120px;
}

.contact-card:hover {
  border-color: var(--primary);
}

.contact-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.contact-value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  word-break: break-all;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.contact-value:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Seksi 6: Penutup & Footer
   ========================================================================== */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 40px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-academic {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-backtop a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background-color: var(--primary-light);
}

.footer-backtop a:hover {
  background-color: var(--primary);
  color: #ffffff;
}

/* ==========================================================================
   Media Queries & Responsif (375px s.d. 1440px)
   ========================================================================== */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-photo-wrapper {
    order: -1;
  }
  
  .profile-img {
    width: 200px;
    height: 200px;
  }
  
  .hero-meta {
    justify-content: center;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .project-card {
    grid-template-columns: 1fr;
  }
  
  .project-visual {
    min-height: 220px;
  }
  
  .cv-box {
    flex-direction: column;
    text-align: center;
    padding: 32px 24px;
  }
  
  .cv-info p {
    margin-bottom: 20px;
  }
}

@media (max-width: 640px) {
  .nav-container {
    height: auto;
    padding: 12px 16px;
    flex-direction: column;
    gap: 10px;
  }
  
  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
  }
  
  .nav-item a {
    padding: 6px 10px;
    font-size: 0.85rem;
  }
  
  .hero-title {
    font-size: 1.85rem;
  }
  
  .hero-subtitle {
    font-size: 1.05rem;
  }
  
  .section {
    padding: 44px 0;
  }
  
  .section-title {
    font-size: 1.6rem;
  }
  
  .project-content {
    padding: 20px;
  }
  
  .metric-value {
    font-size: 1.2rem;
  }
  
  .btn {
    width: 100%;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}