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

html {
  scroll-behavior: smooth;
}

/* =====================================================
   CSS VARIABLES — mengatur warna, ukuran, dan font
   ===================================================== */
:root {
  /* Warna utama */
  --color-white: #ffffff;
  --color-bg-alt: #f4f6fa;
  --color-border: #e3e8f0;

  --color-primary: #2f5fe0;
  --color-primary-dark: #1f45b0;
  --color-primary-soft: #eaf0fd;

  --color-text: #1c2436;
  --color-text-muted: #5b667a;
  --color-text-faint: #8892a3;

  /* Tipografi */
  --font-display: Georgia, "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "Courier New", Courier, monospace;

  /* Ukuran */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;

  --shadow-sm: 0 2px 8px rgba(28, 36, 54, 0.06);
  --shadow-md: 0 10px 30px rgba(28, 36, 54, 0.08);
  --shadow-lg: 0 22px 48px rgba(28, 36, 54, 0.14);

  --transition-base: 0.3s ease;

  --container-width: 1140px;
  --section-padding: 6.5rem 0;

  --navbar-height: 76px;
}

/* =====================================================
   TYPOGRAPHY
   ===================================================== */
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-text);
  line-height: 1.2;
  font-weight: 700;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  color: var(--color-text-muted);
  max-width: 620px;
  font-size: 1.02rem;
}

.section-head {
  margin-bottom: 3rem;
}

.section-head.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-head.center .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    background-color var(--transition-base), color var(--transition-base),
    border-color var(--transition-base);
}

.btn img {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: var(--color-white);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.btn-outline img {
  filter: none;
}

/* =====================================================
   NAVBAR
   ===================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--navbar-height);
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.navbar-brand span {
  color: var(--color-primary);
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.navbar-menu a {
  position: relative;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.4rem 0.05rem;
  transition: color var(--transition-base);
}

.navbar-menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.navbar-menu a:hover,
.navbar-menu a:focus-visible {
  color: var(--color-text);
}

.navbar-menu a:hover::after,
.navbar-menu a:focus-visible::after {
  width: 100%;
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
  padding-top: calc(var(--navbar-height) + 5rem);
  padding-bottom: 5rem;
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-white) 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 3.5rem;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.hero-name {
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  margin-bottom: 0.5rem;
}

.hero-role {
  font-size: 1.25rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 1.4rem;
}

.hero-desc {
  color: var(--color-text-muted);
  max-width: 520px;
  margin-bottom: 2.2rem;
  font-size: 1.02rem;
}

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

.hero-photo-wrap {
  position: relative;
  justify-self: center;
}

.hero-photo-ring {
  position: absolute;
  inset: -18px;
  border: 1.5px dashed var(--color-primary);
  border-radius: 50%;
  opacity: 0.35;
}

.hero-photo {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  overflow: hidden;
  border: 6px solid var(--color-white);
  box-shadow: var(--shadow-lg);
  background-color: var(--color-bg-alt);
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* =====================================================
   ABOUT SECTION
   ===================================================== */
.about {
  padding: var(--section-padding);
}

.about .container {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3.5rem;
  align-items: start;
}

.about-intro p {
  color: var(--color-text-muted);
  margin-bottom: 1.1rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.about-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.about-card h3 {
  font-size: 1.02rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

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

/* =====================================================
   SKILLS SECTION
   ===================================================== */
.skills {
  padding: var(--section-padding);
  background-color: var(--color-bg-alt);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.5rem;
}

.skill-category h3 {
  font-size: 1rem;
  text-align: center;
  margin-bottom: 1.25rem;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.82rem;
}

.skill-card-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.skill-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.1rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  border: 1px solid var(--color-border);
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-soft);
}

.skill-card-top {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.7rem;
}

.skill-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.skill-name {
  font-size: 0.92rem;
  font-weight: 600;
}

.skill-level {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.skill-level-label {
  font-size: 0.74rem;
  color: var(--color-text-faint);
  font-family: var(--font-mono);
}

.skill-dots {
  display: flex;
  gap: 0.3rem;
}

.skill-dots span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-border);
}

.skill-dots span.filled {
  background-color: var(--color-primary);
}

/* =====================================================
   PROJECTS SECTION
   ===================================================== */
.projects {
  padding: var(--section-padding);
}

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

.project-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.project-thumb {
  overflow: hidden;
  aspect-ratio: 3 / 2;
}

.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.project-card:hover .project-thumb img {
  transform: scale(1.06);
}

.project-body {
  padding: 1.5rem;
}

.project-body h3 {
  font-size: 1.12rem;
  margin-bottom: 0.5rem;
}

.project-body p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.3rem;
}

.project-tech span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.28rem 0.65rem;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

.project-links {
  display: flex;
  gap: 0.75rem;
}

.project-links .btn {
  padding: 0.6rem 1.15rem;
  font-size: 0.85rem;
}

/* =====================================================
   EDUCATION — TIMELINE
   ===================================================== */
.education {
  padding: var(--section-padding);
  background-color: var(--color-bg-alt);
}

.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 2.4rem;
  border-left: 2px solid var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.6rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -2.55rem;
  top: 0.35rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--color-white);
  border: 3px solid var(--color-primary);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: 0.3rem;
  display: block;
}

.timeline-item h3 {
  font-size: 1.08rem;
  margin-bottom: 0.3rem;
}

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

/* =====================================================
   CERTIFICATES
   ===================================================== */
.certificates {
  padding: var(--section-padding);
}

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.certificate-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.certificate-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.certificate-card img {
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* =====================================================
   CONTACT SECTION
   ===================================================== */
.contact {
  padding: var(--section-padding);
  background-color: var(--color-bg-alt);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  text-align: center;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.2rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-soft);
}

.contact-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-soft);
  border-radius: 50%;
}

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

.contact-card span.contact-label {
  font-size: 0.78rem;
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-card span.contact-value {
  font-size: 0.92rem;
  font-weight: 600;
  word-break: break-word;
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--color-border);
}

.footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-copy {
  font-size: 0.86rem;
  color: var(--color-text-faint);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-nav a {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

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

.footer-social {
  display: flex;
  gap: 0.9rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.footer-social a:hover {
  background-color: var(--color-primary-soft);
  transform: translateY(-3px);
}

.footer-social img {
  width: 17px;
  height: 17px;
}

/* =====================================================
   RESPONSIVE — TABLET
   ===================================================== */
@media (max-width: 992px) {
  :root {
    --section-padding: 5rem 0;
  }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-photo-wrap {
    order: -1;
  }

  .hero-photo {
    width: 240px;
    height: 240px;
  }

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

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

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

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

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

  .navbar-menu {
    gap: 1.3rem;
  }
}

/* =====================================================
   RESPONSIVE — MOBILE
   ===================================================== */
@media (max-width: 640px) {
  :root {
    --section-padding: 3.75rem 0;
  }

  .navbar .container {
    flex-direction: column;
    justify-content: center;
    height: auto;
    padding-top: 0.85rem;
    padding-bottom: 0.85rem;
    gap: 0.6rem;
  }

  .navbar {
    height: auto;
    position: sticky;
  }

  .hero {
    padding-top: 2.5rem;
  }

  .navbar-menu {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.9rem 1.2rem;
  }

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

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

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

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

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

  .footer .container {
    flex-direction: column;
    text-align: center;
  }

  .footer-nav {
    justify-content: center;
  }
}

/* =====================================================
   ACCESSIBILITY — focus states
   ===================================================== */
a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}