Upload Progress

*,
*::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;
}

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

/* Dropzone */
.up-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 36px 20px;
  border-bottom: 1px solid #21262d;
  text-align: center;
  transition: background 0.2s;
}
.up-dropzone.dragover {
  background: rgba(99, 102, 241, 0.06);
}

.up-dz-icon {
  width: 48px;
  height: 48px;
  background: rgba(99, 102, 241, 0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 4px;
}

.up-dz-text {
  font-size: 14px;
  color: #8b949e;
}
.up-dz-link {
  background: none;
  border: none;
  color: #6366f1;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
}
.up-dz-link:hover {
  color: #818cf8;
}
.up-dz-sub {
  font-size: 12px;
  color: #4a555f;
}

/* Upload list */
.up-list {
  display: flex;
  flex-direction: column;
}

.up-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid #21262d;
  animation: up-in 0.25s ease;
}
@keyframes up-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.up-item:last-child {
  border-bottom: none;
}

.up-item-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.up-item-body {
  flex: 1;
  min-width: 0;
}

.up-item-name {
  font-size: 13px;
  font-weight: 600;
  color: #e6edf3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 6px;
}

.up-bar-wrap {
  height: 5px;
  background: #21262d;
  border-radius: 3px;
  overflow: hidden;
}

.up-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s ease;
  background: #6366f1;
}
.up-bar-fill--done {
  background: #3fb950;
}
.up-bar-fill--error {
  background: #f85149;
}

.up-item-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 4px;
}

.up-item-status {
  font-size: 11px;
  color: #6c7086;
}
.up-item-status--done {
  color: #3fb950;
}
.up-item-status--error {
  color: #f85149;
}
.up-item-pct {
  font-size: 11px;
  color: #6c7086;
  font-family: Menlo, monospace;
}

.up-item-remove {
  background: none;
  border: none;
  color: #4a555f;
  font-size: 14px;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: all 0.15s;
  flex-shrink: 0;
}
.up-item-remove:hover {
  color: #f85149;
  background: rgba(248, 81, 73, 0.08);
}

/* Footer */
.up-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-top: 1px solid #21262d;
  background: #1c2128;
  gap: 12px;
  flex-wrap: wrap;
}

.up-summary {
  font-size: 12px;
  color: #6c7086;
}
.up-footer-actions {
  display: flex;
  gap: 8px;
}

.up-btn {
  padding: 7px 16px;
  background: #6366f1;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
.up-btn:hover {
  opacity: 0.85;
}
.up-btn--ghost {
  background: #21262d;
  color: #8b949e;
  border: 1px solid #30363d;
}
.up-btn--ghost:hover {
  opacity: 1;
  color: #e6edf3;
  border-color: #8b949e;
}

const DEMO_FILES = [
  { name: "report_q1_2026.pdf", size: "4.2 MB", icon: "📄" },
  { name: "hero_image.png", size: "2.8 MB", icon: "🖼" },
  { name: "data_export.xlsx", size: "1.1 MB", icon: "📊" },
  { name: "presentation.pptx", size: "8.6 MB", icon: "📋" },
  { name: "source_archive.zip", size: "22.4 MB", icon: "🗜" },
];

let items = [];
let demoIdx = 0;

function renderItems() {
  const list = document.getElementById("upList");
  const footer = document.getElementById("upFooter");
  const summary = document.getElementById("upSummary");

  list.innerHTML = "";

  if (items.length === 0) {
    footer.hidden = true;
    return;
  }
  footer.hidden = false;

  const done = items.filter((i) => i.status === "done").length;
  const err = items.filter((i) => i.status === "error").length;
  summary.textContent = `${done} of ${items.length} complete${err ? ` · ${err} failed` : ""}`;

  items.forEach((item) => {
    const div = document.createElement("div");
    div.className = "up-item";
    div.id = `up-item-${item.id}`;

    const pctStr =
      item.status === "done" ? "100%" : item.status === "error" ? "Failed" : `${item.pct}%`;
    const fillCls =
      item.status === "done"
        ? "up-bar-fill--done"
        : item.status === "error"
          ? "up-bar-fill--error"
          : "";
    const statusCls =
      item.status === "done"
        ? "up-item-status--done"
        : item.status === "error"
          ? "up-item-status--error"
          : "";
    const statusText =
      item.status === "done"
        ? "✓ Complete"
        : item.status === "error"
          ? "✕ Failed"
          : item.status === "pending"
            ? "Waiting…"
            : "Uploading…";

    div.innerHTML = `
      <div class="up-item-icon">${item.icon}</div>
      <div class="up-item-body">
        <div class="up-item-name">${item.name}</div>
        <div class="up-bar-wrap">
          <div class="up-bar-fill ${fillCls}" style="width:${item.status === "done" ? 100 : item.pct}%"></div>
        </div>
        <div class="up-item-meta">
          <span class="up-item-status ${statusCls}">${statusText}</span>
          <span class="up-item-pct">${item.size} · ${pctStr}</span>
        </div>
      </div>
      <button class="up-item-remove" data-id="${item.id}" title="Remove">✕</button>
    `;
    list.appendChild(div);
  });
}

function startUpload(item) {
  item.status = "uploading";
  item.pct = 0;
  renderItems();

  const speed = 8 + Math.random() * 14;
  const interval = setInterval(() => {
    item.pct = Math.min(item.pct + speed * (0.8 + Math.random() * 0.4), 99);
    renderItems();

    if (item.pct >= 99) {
      clearInterval(interval);
      setTimeout(
        () => {
          item.status = Math.random() > 0.15 ? "done" : "error";
          item.pct = 100;
          renderItems();
        },
        300 + Math.random() * 400
      );
    }
  }, 120);
}

document.getElementById("upSimBtn").addEventListener("click", () => {
  const f = DEMO_FILES[demoIdx % DEMO_FILES.length];
  demoIdx++;
  const item = { id: Date.now(), ...f, pct: 0, status: "pending" };
  items.push(item);
  renderItems();
  setTimeout(() => startUpload(item), 400);
});

document.getElementById("upUploadAllBtn").addEventListener("click", () => {
  const pending = items.filter((i) => i.status === "pending" || i.status === "error");
  pending.forEach((item, i) => {
    setTimeout(() => startUpload(item), i * 300);
  });
});

document.getElementById("upClearBtn").addEventListener("click", () => {
  items = items.filter((i) => i.status === "uploading");
  renderItems();
});

document.getElementById("upList").addEventListener("click", (e) => {
  const btn = e.target.closest("[data-id]");
  if (!btn) return;
  const id = parseInt(btn.dataset.id);
  items = items.filter((i) => i.id !== id);
  renderItems();
});

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Upload Progress</title>
  <link rel="stylesheet" href="style.css" />
</head>
<body>
<div class="demo">
  <div class="up-panel">
    <div class="up-dropzone" id="upDropzone">
      <div class="up-dz-icon">⬆</div>
      <p class="up-dz-text">Drop files here or <button class="up-dz-link" id="upSimBtn">simulate upload</button></p>
      <p class="up-dz-sub">Supports PDF, DOC, XLS, images up to 50MB</p>
    </div>

    <div class="up-list" id="upList"></div>

    <div class="up-footer" id="upFooter" hidden>
      <div class="up-summary" id="upSummary"></div>
      <div class="up-footer-actions">
        <button class="up-btn up-btn--ghost" id="upClearBtn">Clear all</button>
        <button class="up-btn" id="upUploadAllBtn">Upload all</button>
      </div>
    </div>
  </div>
</div>
<script src="script.js"></script>
</body>
</html>