:root {
  --bg: #0f1117;
  --panel: #181b23;
  --panel-2: #1f2330;
  --border: #2a2f3e;
  --text: #e8eaf0;
  --muted: #9aa1b2;
  --accent: #4f7cff;
  --accent-2: #6b8fff;
  --ok: #2ecc8f;
  --err: #ff5f6b;
  --radius: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px 48px;
}
header { text-align: center; margin: 24px 0 28px; }
header h1 { font-size: 1.7rem; letter-spacing: .5px; }
header h1 span { color: var(--accent); }
header p { color: var(--muted); margin-top: 6px; font-size: .95rem; }

.card {
  width: 100%;
  max-width: 560px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

#dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  outline: none;
}
#dropzone:hover, #dropzone:focus-visible, #dropzone.dragover {
  border-color: var(--accent);
  background: var(--panel-2);
}
#dropzone .icon { font-size: 2.2rem; }
#dropzone p { margin-top: 10px; color: var(--muted); font-size: .95rem; }
#dropzone p b { color: var(--text); }
#dropzone small { display: block; margin-top: 8px; color: var(--muted); font-size: .8rem; }

#preview-wrap { display: none; margin-top: 18px; text-align: center; }
#preview-wrap.show { display: block; }
#preview {
  max-width: 100%;
  max-height: 320px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel-2);
}
#file-meta { margin-top: 10px; color: var(--muted); font-size: .85rem; word-break: break-all; }

.actions { display: none; gap: 10px; margin-top: 16px; }
.actions.show { display: flex; }
button {
  flex: 1;
  padding: 12px 16px;
  border: none;
  border-radius: 10px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter .15s, opacity .15s;
}
button:disabled { opacity: .55; cursor: not-allowed; }
#btn-upload { background: var(--accent); color: #fff; }
#btn-upload:hover:not(:disabled) { filter: brightness(1.12); }
#btn-reset { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); flex: 0 0 auto; }

#progress-wrap { display: none; margin-top: 16px; }
#progress-wrap.show { display: block; }
#progress-bar-bg {
  height: 8px;
  background: var(--panel-2);
  border-radius: 99px;
  overflow: hidden;
}
#progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 99px;
  transition: width .15s;
}
#progress-text { margin-top: 6px; font-size: .8rem; color: var(--muted); text-align: right; }

#result { display: none; margin-top: 18px; }
#result.show { display: block; }
#result .ok-badge { color: var(--ok); font-weight: 600; font-size: .95rem; }
.linkrow {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.linkrow input {
  flex: 1;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 11px 12px;
  font-size: .85rem;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
}
.linkrow button { flex: 0 0 auto; background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
.linkrow button.copied { background: var(--ok); border-color: var(--ok); color: #08281c; }

#error {
  display: none;
  margin-top: 16px;
  background: rgba(255,95,107,.1);
  border: 1px solid rgba(255,95,107,.4);
  color: var(--err);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: .9rem;
}
#error.show { display: block; }

footer { margin-top: 28px; color: var(--muted); font-size: .8rem; text-align: center; }