:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #eef0f3;
  --border: #dde1e6;
  --text: #1a1d21;
  --text-dim: #6b7280;
  --accent: #3d6ee0;
  --accent-hover: #2f5bc4;
  --danger: #d84a43;
  --danger-hover: #c03a34;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: #e4e7eb; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: transparent; border-color: var(--border); color: var(--danger); }
.btn-danger:hover { background: rgba(216, 74, 67, 0.08); border-color: var(--danger); }
.btn-ghost { background: transparent; }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 10px; font-size: 13px; }

/* Логотип */
.logo {
  display: block;
  height: 120px;
  max-width: 100%;
  width: auto;
  margin: 0 auto 14px;
  object-fit: contain;
}
.topbar .logo {
  height: 28px;
  margin: 0;
}
.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Login */
.screen { min-height: 100vh; }
#login-screen { display: flex; align-items: center; justify-content: center; padding: 24px; }
.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 1px 3px rgba(16, 24, 40, 0.06), 0 8px 24px rgba(16, 24, 40, 0.04);
}
.login-card h1 { margin: 0 0 4px; font-size: 20px; text-align: center; }
.subtitle { margin: 0 0 20px; color: var(--text-dim); font-size: 14px; text-align: center; }
.login-card label {
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--text-dim);
}
.login-card input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
.login-card input:focus { outline: none; border-color: var(--accent); }
.error { color: var(--danger); font-size: 13px; margin: -4px 0 12px; }

/* App */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.topbar h1 { font-size: 18px; margin: 0; }
.content { max-width: 720px; margin: 0 auto; padding: 24px; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 14px;
  padding: 36px 20px;
  text-align: center;
  margin-bottom: 24px;
  background: var(--surface);
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.dragover {
  border-color: var(--accent);
  background: rgba(61, 110, 224, 0.06);
}
.dropzone-title { font-size: 16px; margin: 0 0 4px; }
.dropzone-sub { color: var(--text-dim); font-size: 13px; margin: 0 0 14px; }

.file-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.file-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.file-icon { font-size: 22px; flex-shrink: 0; }
.file-info { flex: 1; min-width: 0; }
.file-name { font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta { font-size: 12px; color: var(--text-dim); margin-top: 2px; }
.file-actions { display: flex; gap: 8px; flex-shrink: 0; }

.empty-state { color: var(--text-dim); text-align: center; padding: 24px; }

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  border: 1px solid var(--border);
  color: var(--surface);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  box-shadow: 0 4px 16px rgba(16, 24, 40, 0.16);
}
.toast.error { border-color: var(--danger); background: var(--danger); color: #fff; }

/* Public share page */
.share-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.share-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(16, 24, 40, 0.06), 0 8px 24px rgba(16, 24, 40, 0.04);
}
.share-card h1 {
  font-size: 18px;
  margin: 0 0 6px;
  word-break: break-word;
}
.share-card .meta { color: var(--text-dim); font-size: 13px; margin: 0 0 20px; }
.share-actions { display: flex; gap: 10px; justify-content: center; }