:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-tertiary: #e8e8e8;
  --text-primary: #131313;
  --text-secondary: #666666;
  --link: #6a3da3;
  --border-primary: #cccccc;
  --border-secondary: #e0e0e0;
  --error-bg: #ffe5e5;
  --error-border: #ffcccc;
  --error-text: #cc0000;
  --warning-bg: #fffaeb;
  --warning-border: #ffe4a3;
  --warning-text: #8b6914;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #131313;
    --bg-secondary: #222222;
    --bg-tertiary: #333333;
    --text-primary: #eeeeee;
    --text-secondary: #888888;
    --link: #aa85cc;
    --border-primary: #444444;
    --border-secondary: #333333;
    --error-bg: #2a1111;
    --error-border: #6a1111;
    --error-text: #ff6666;
    --warning-bg: #2a2211;
    --warning-border: #6a6a11;
    --warning-text: #ffdd66;
  }
}

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

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    font-size: 13px;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 8px;
}

h1 { margin-bottom: 20px; font-size: 24px; }
h2 { margin-top: 24px; margin-bottom: 12px; font-size: 20px; }
h3 { margin-top: 16px; margin-bottom: 8px; font-size: 16px; }
h4 { margin-top: 12px; margin-bottom: 8px; font-size: 14px; }
p { margin-bottom: 12px; }

section {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 2px solid var(--border-primary);
}

section:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

a {
  color: var(--link);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

code {
  background: var(--bg-secondary);
  padding: 2px;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
}

pre {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  padding: 4px;
  overflow-x: auto;
  border-radius: 4px;
  margin: 8px 0;
}

pre code {
  background: none;
  padding: 0;
}

ul { padding-left: 1em; }

input, select, button {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
}
select, button { padding: 0 3px;}
fieldset { padding: 8px; border: 1px solid var(--border-primary); }

button { cursor: pointer; }
button:hover { background: var(--bg-tertiary); }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 2px 4px; text-align: left; white-space: nowrap; }
td { border-top: 1px solid var(--border-secondary); }
th { background: var(--bg-secondary); }
th.sortable { cursor: pointer; user-select: none; }
th.sortable:hover { background: var(--bg-tertiary); }
th:first-child, td:first-child { width: 100%; white-space: normal; }
footer { text-align: center; margin-top: 20px; }

#upload-button {
    font-size: 18px;
    padding: 16px 32px;
    cursor: pointer;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

#upload-button .upload-text {
    font-size: 18px;
}

#upload-button .upload-limit {
    font-size: 12px;
    opacity: 0.7;
}

.container { max-width: 900px; margin: 0 auto; }
.error {
    padding: 6px;
    margin-bottom: 20px;
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error-text);
}
.warning {
    padding: 6px;
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: var(--warning-text);
}
.warning-title {
    font-size: 16px;
}
.warning-container {
    max-width: 600px;
    margin: 32px auto;
}
.hidden { display: none; }
.info { font-size: 12px; color: var(--text-secondary); margin-bottom: 20px; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.drop-zone {
    margin: 8px 0;
    border: 2px dashed var(--border-primary);
    padding: 40px;
    text-align: center;
    background: var(--bg-secondary);
    transition: all 0.3s ease;
}
.drop-zone.drag-over {
    border-color: var(--link);
    background: var(--bg-tertiary);
}

.files-table {
    margin-top: 40px;
}

.media-image {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--border-primary);
}

.media-video {
    max-width: 100%;
    border: 1px solid var(--border-primary);
}

.media-audio {
    width: 100%;
}

.media-pdf {
    width: 100%;
    height: 80vh;
    border: 1px solid var(--border-primary);
}

.media-text {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    padding: 12px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.file-metadata {
    display: flex;
    column-gap: 16px;
    flex-wrap: wrap;
}

.actions {
    display: flex;
    gap: 4px;
    align-items: center;
}

.delete-btn {
    background: var(--error-bg);
    border-color: var(--error-border);
    color: var(--error-text);
}

/* Spacing utilities */
.my-8 { margin-top: 8px; margin-bottom: 8px; }
.my-20 { margin-top: 20px; margin-bottom: 20px; }
.mb-20 { margin-bottom: 20px; }