Attachment List

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0d1117;
  color: #e6edf3;
  min-height: 100vh;
  padding: 32px 16px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.demo {
  width: 100%;
  max-width: 560px;
}

.att-panel {
  background: #161b22;
  border: 1px solid #21262d;
  border-radius: 14px;
  overflow: hidden;
}

.att-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-bottom: 1px solid #21262d;
  background: #1c2128;
}

.att-title {
  font-size: 14px;
  font-weight: 700;
  color: #e6edf3;
}
.att-count {
  font-size: 12px;
  color: #6c7086;
  flex: 1;
}

.att-add-btn {
  background: #21262d;
  border: 1px solid #30363d;
  color: #8b949e;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.15s;
}
.att-add-btn:hover {
  color: #e6edf3;
  border-color: #8b949e;
  background: #30363d;
}

.att-list {
  padding: 8px 0;
}

.att-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  transition: background 0.15s;
}
.att-item:hover {
  background: rgba(255, 255, 255, 0.03);
}

.att-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.att-icon--pdf {
  background: rgba(248, 81, 73, 0.12);
}
.att-icon--doc {
  background: rgba(56, 139, 253, 0.12);
}
.att-icon--xls {
  background: rgba(63, 185, 80, 0.12);
}
.att-icon--img {
  background: rgba(163, 113, 247, 0.12);
}
.att-icon--zip {
  background: rgba(210, 153, 34, 0.12);
}
.att-icon--mp4 {
  background: rgba(99, 102, 241, 0.12);
}
.att-icon--default {
  background: rgba(255, 255, 255, 0.06);
}

.att-info {
  flex: 1;
  min-width: 0;
}
.att-name {
  font-size: 13px;
  font-weight: 600;
  color: #e6edf3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 2px;
}
.att-size {
  font-size: 11px;
  color: #6c7086;
}

.att-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s;
}
.att-item:hover .att-actions {
  opacity: 1;
}

.att-action-btn {
  background: none;
  border: none;
  color: #6c7086;
  font-size: 13px;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.att-action-btn:hover {
  color: #e6edf3;
  background: rgba(255, 255, 255, 0.06);
}
.att-action-btn--del:hover {
  color: #f85149;
  background: rgba(248, 81, 73, 0.08);
}

.att-divider {
  height: 1px;
  background: #21262d;
  margin: 4px 0;
}

.att-empty {
  padding: 32px;
  text-align: center;
  color: #4a555f;
  font-size: 13px;
}

const FILE_ICONS = {
  pdf: "📄",
  doc: "📝",
  docx: "📝",
  xls: "📊",
  xlsx: "📊",
  png: "🖼",
  jpg: "🖼",
  gif: "🖼",
  webp: "🖼",
  svg: "🖼",
  zip: "🗜",
  tar: "🗜",
  gz: "🗜",
  mp4: "🎬",
  mov: "🎬",
  mp3: "🎵",
  default: "📎",
};

const FILE_CLS = {
  pdf: "pdf",
  doc: "doc",
  docx: "doc",
  xls: "xls",
  xlsx: "xls",
  png: "img",
  jpg: "img",
  gif: "img",
  webp: "img",
  svg: "img",
  zip: "zip",
  tar: "zip",
  gz: "zip",
  mp4: "mp4",
  mov: "mp4",
};

let files = [
  { id: 1, name: "contract_signed.pdf", size: "1.2 MB" },
  { id: 2, name: "meeting_notes.docx", size: "48 KB" },
  { id: 3, name: "budget_q1.xlsx", size: "324 KB" },
  { id: 4, name: "hero_banner.png", size: "2.4 MB" },
  { id: 5, name: "source_code.zip", size: "18.6 MB" },
  { id: 6, name: "demo_recording.mp4", size: "94.2 MB" },
];

const DEMO_NAMES = ["design_mockup.png", "api_spec.pdf", "data_export.csv", "readme.md"];
let demoIdx = 0;

function getExt(name) {
  return name.split(".").pop().toLowerCase();
}

function renderList() {
  const list = document.getElementById("attList");
  const count = document.getElementById("attCount");
  count.textContent = `${files.length} file${files.length !== 1 ? "s" : ""}`;

  if (files.length === 0) {
    list.innerHTML = '<div class="att-empty">No attachments yet</div>';
    return;
  }

  list.innerHTML = "";
  files.forEach((f, idx) => {
    const ext = getExt(f.name);
    const icon = FILE_ICONS[ext] || FILE_ICONS.default;
    const cls = FILE_CLS[ext] || "default";

    const item = document.createElement("div");
    item.className = "att-item";
    item.innerHTML = `
      <div class="att-icon att-icon--${cls}">${icon}</div>
      <div class="att-info">
        <div class="att-name">${f.name}</div>
        <div class="att-size">${f.size}</div>
      </div>
      <div class="att-actions">
        <button class="att-action-btn" title="Download" data-id="${f.id}">⬇</button>
        <button class="att-action-btn att-action-btn--del" title="Remove" data-id="${f.id}" data-action="remove">✕</button>
      </div>
    `;

    if (idx < files.length - 1) {
      const div = document.createElement("div");
      div.className = "att-divider";
      list.appendChild(item);
      list.appendChild(div);
    } else {
      list.appendChild(item);
    }
  });
}

document.getElementById("attList").addEventListener("click", (e) => {
  const btn = e.target.closest('[data-action="remove"]');
  if (!btn) return;
  const id = parseInt(btn.dataset.id);
  files = files.filter((f) => f.id !== id);
  renderList();
});

document.getElementById("attAddBtn").addEventListener("click", () => {
  const name = DEMO_NAMES[demoIdx % DEMO_NAMES.length];
  demoIdx++;
  const sizes = ["12 KB", "450 KB", "2.1 MB", "88 KB"];
  files.push({ id: Date.now(), name, size: sizes[demoIdx % sizes.length] });
  renderList();
});

renderList();

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Attachment List</title>
  <link rel="stylesheet" href="style.css" />
</head>
<body>
<div class="demo">
  <div class="att-panel">
    <div class="att-header">
      <span class="att-title">Attachments</span>
      <span class="att-count" id="attCount">0 files</span>
      <button class="att-add-btn" id="attAddBtn">+ Add files</button>
    </div>
    <div class="att-list" id="attList"></div>
  </div>
</div>
<script src="script.js"></script>
</body>
</html>