Saya sudah lihat struktur HTML Anda. Saya akan membuatkan `style.css` dengan tema teknologi komputer & jaringan yang keren — dengan gaya cyber/tech, grid pattern halus, font modern, animasi smooth, dan dark/light mode toggle yang berfungsi penuh.
Action: file_editor create /app/style.css --file-text "/* =========================================================
   PORTFOLIO RADITYO — TKJ / NETWORK THEME
   Author style: tech, cyber, circuit-inspired
   ========================================================= */

/* ---------- IMPORT FONTS ---------- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ---------- ROOT VARIABLES (LIGHT MODE) ---------- */
:root {
  --bg: #f4f7fb;
  --bg-grid: rgba(15, 23, 42, 0.05);
  --surface: #ffffff;
  --surface-2: #eef2f8;
  --border: #d8e0ec;
  --text: #0f172a;
  --text-muted: #475569;
  --accent: #0ea5b7;          /* teal-cyan */
  --accent-2: #1e40af;        /* deep navy-blue */
  --accent-glow: rgba(14, 165, 183, 0.35);
  --danger: #ef4444;
  --shadow-sm: 0 4px 14px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.10);
  --radius: 14px;
  --radius-lg: 20px;
}

/* ---------- DARK MODE ---------- */
body.dark {
  --bg: #070b14;
  --bg-grid: rgba(0, 212, 255, 0.06);
  --surface: #0f1626;
  --surface-2: #131c30;
  --border: #1e2a44;
  --text: #e6edf6;
  --text-muted: #94a3b8;
  --accent: #22d3ee;
  --accent-2: #38bdf8;
  --accent-glow: rgba(34, 211, 238, 0.35);
  --shadow-sm: 0 4px 18px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 18px 40px rgba(0, 0, 0, 0.55);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  background-image:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 42px 42px;
  background-attachment: fixed;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

/* radial glow accents on background */
body::before {
  content: \"\";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 12% 8%, var(--accent-glow), transparent 40%),
    radial-gradient(circle at 88% 92%, var(--accent-glow), transparent 45%);
  opacity: 0.55;
  z-index: 0;
}

/* ---------- DARK MODE TOGGLE BUTTON ---------- */
.toggle-btn {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 50;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
}
.toggle-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- CONTAINER ---------- */
.container {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0 auto;
  padding: 80px 24px 100px;
}

/* ---------- PROFILE HEADER ---------- */
.profile {
  position: relative;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 60px 28px 40px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  margin-bottom: 40px;
}

/* circuit accent line */
.profile::before {
  content: \"\";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), var(--accent), transparent);
  background-size: 200% 100%;
  animation: scanline 5s linear infinite;
}
@keyframes scanline {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.profile-img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--surface);
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  box-shadow: 0 0 0 4px var(--surface), 0 8px 30px var(--accent-glow);
  margin-bottom: 22px;
  transition: transform 0.4s ease;
}
.profile-img:hover { transform: scale(1.05) rotate(-2deg); }

.profile h1 {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.profile .subtitle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}
.profile .subtitle::before { content: \"> \"; opacity: 0.7; }

/* ---------- BUTTONS ---------- */
.btn-download,
.btn-contact {
  display: inline-block;
  padding: 12px 26px;
  margin: 6px 6px 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-decoration: none;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
  border: 1px solid transparent;
}

.btn-download {
  background: var(--accent);
  color: #04141a;
  box-shadow: 0 6px 20px var(--accent-glow);
}
.btn-download:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px var(--accent-glow);
}

.btn-contact {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-contact:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}

/* ---------- SECTIONS ---------- */
section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
section:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

section h2 {
  position: relative;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-left: 18px;
  letter-spacing: -0.01em;
}
section h2::before {
  content: \"\";
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 4px;
  border-radius: 4px;
  background: linear-gradient(var(--accent), var(--accent-2));
}
section h2::after {
  content: \" //\";
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 400;
}

section p { color: var(--text-muted); margin-bottom: 8px; }
section p strong { color: var(--text); font-weight: 600; }

/* ---------- LIST ---------- */
.list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 8px;
}
.list li {
  position: relative;
  padding: 14px 16px 14px 44px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14.5px;
  color: var(--text);
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
.list li::before {
  content: \"▸\";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}
.list li:hover {
  transform: translateX(4px);
  border-color: var(--accent);
  background: var(--surface);
}

/* ---------- CARDS ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-top: 10px;
}
.card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.card::before {
  content: \"\";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent, var(--accent), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 30px var(--accent-glow);
}
.card:hover::before { opacity: 1; }

Saya perbesar ukuran gambar di card organisasi:
Action: file_editor str_replace /app/style.css --old-str ".card img {
  width: 70px;
  height: 70px;
  object-fit: contain;
  margin-bottom: 12px;
  filter: drop-shadow(0 4px 10px rgba(0,0,0,0.15));
}" --new-str ".card img {
  width: 130px;
  height: 130px;
  object-fit: contain;
  margin: 4px auto 16px;
  display: block;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  filter: drop-shadow(0 6px 14px rgba(0,0,0,0.18));
  transition: transform 0.35s ease, border-color 0.3s ease;
}
.card:hover img {
  transform: scale(1.08);
  border-color: var(--accent);
}"
Observation: Edit was successful.
/* ---------- IG-SLIDER ---------- */
.ig-slider {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.ig-slides {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.65, 0, 0.35, 1);
  width: 100%;
}
.ig-slides img {
  flex: 0 0 100%;
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
}
.dots {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(6px);
  padding: 6px 12px;
  border-radius: 999px;
}
.dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: background 0.25s ease, transform 0.25s ease;
}
.dots span.active {
  background: var(--accent);
  transform: scale(1.3);
  box-shadow: 0 0 10px var(--accent);
}

/* ---------- CONTACT FORM ---------- */
#contact form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 8px;
}
#contact input,
#contact textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}
#contact input::placeholder,
#contact textarea::placeholder { color: var(--text-muted); }
#contact input:focus,
#contact textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
  background: var(--surface);
}
#contact textarea { min-height: 130px; resize: vertical; }

#contact button[type=\"submit\"] {
  align-self: flex-start;
  padding: 13px 30px;
  background: var(--accent);
  color: #04141a;
  border: none;
  border-radius: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.5px;
  cursor: pointer;
  box-shadow: 0 6px 20px var(--accent-glow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
#contact button[type=\"submit\"]:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px var(--accent-glow);
}

/* ---------- ENTRANCE ANIMATION ---------- */
.profile, section {
  animation: fadeUp 0.7s ease both;
}
section:nth-of-type(1) { animation-delay: 0.05s; }
section:nth-of-type(2) { animation-delay: 0.10s; }
section:nth-of-type(3) { animation-delay: 0.15s; }
section:nth-of-type(4) { animation-delay: 0.20s; }
section:nth-of-type(5) { animation-delay: 0.25s; }
section:nth-of-type(6) { animation-delay: 0.30s; }
section:nth-of-type(7) { animation-delay: 0.35s; }
section:nth-of-type(8) { animation-delay: 0.40s; }
section:nth-of-type(9) { animation-delay: 0.45s; }

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

/* ---------- TEXT SELECTION ---------- */
::selection { background: var(--accent); color: #04141a; }

/* ---------- SCROLLBAR ---------- */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 720px) {
  .container { padding: 70px 16px 80px; }
  .profile { padding: 50px 20px 30px; }
  .profile-img { width: 120px; height: 120px; }
  section { padding: 28px 20px; }
  section h2 { font-size: 19px; }
  .ig-slides img { height: 280px; }
  .toggle-btn { top: 14px; right: 14px; padding: 8px 14px; font-size: 12px; }
  .btn-download, .btn-contact { display: block; width: 100%; margin: 8px 0 0; }
}
"
Observation: Create successful: /app/style.css