/* === CSS Custom Properties (MD3-inspired) === */
:root {
  --md-surface: #fffbff;
  --md-on-surface: #1c1b1f;
  --md-primary: #3f51b5;
  --md-on-primary: #fff;
  --md-surface-variant: #e7e0ec;
  --md-outline: #79747e;
  --md-outline-variant: #cac4d0;
  --md-surface-container: #f3edf7;
  --md-link: #1a73e8;
  --md-link-visited: #6a1b9a;
  --md-code-bg: #f5f5f5;
  --md-code-border: #e0e0e0;
  --md-hover-bg: rgba(0,0,0,0.04);
  --md-radius: 12px;
  --md-radius-sm: 8px;
  --font-body: Georgia, "Times New Roman", "Literata", serif;
  --font-mono: "Cascadia Code", "Fira Code", "JetBrains Mono", "Consolas", monospace;
  --max-width: 52rem;
}

/* Sepia theme */
[data-theme="sepia"] {
  --md-surface: #f5efe0;
  --md-on-surface: #3e3226;
  --md-primary: #8b6b3e;
  --md-surface-variant: #ebe3d3;
  --md-outline: #8a7e6d;
  --md-surface-container: #efe8d8;
  --md-link: #6b4f2a;
  --md-link-visited: #5a3a1a;
  --md-code-bg: #ebe3d3;
  --md-code-border: #d6cdb8;
  --md-hover-bg: rgba(0,0,0,0.04);
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
  :root, [data-theme="auto"] {
    --md-surface: #1c1b1f;
    --md-on-surface: #e6e1e5;
    --md-primary: #6dcaff;
    --md-surface-variant: #49454f;
    --md-outline: #938f99;
    --md-outline-variant: #49454f;
    --md-surface-container: #211f26;
    --md-link: #8ab4f8;
    --md-link-visited: #c58af9;
    --md-code-bg: #2b2930;
    --md-code-border: #49454f;
    --md-hover-bg: rgba(255,255,255,0.06);
  }
}

[data-theme="dark"] {
  --md-surface: #1c1b1f;
  --md-on-surface: #e6e1e5;
  --md-primary: #6dcaff;
  --md-surface-variant: #49454f;
  --md-outline: #938f99;
  --md-outline-variant: #49454f;
  --md-surface-container: #211f26;
  --md-link: #8ab4f8;
  --md-link-visited: #c58af9;
  --md-code-bg: #2b2930;
  --md-code-border: #49454f;
  --md-hover-bg: rgba(255,255,255,0.06);
}

[data-theme="light"] {
  --md-surface: #fffbff;
  --md-on-surface: #1c1b1f;
  --md-primary: #3f51b5;
  --md-surface-variant: #e7e0ec;
  --md-outline: #79747e;
  --md-surface-container: #f3edf7;
  --md-link: #1a73e8;
  --md-link-visited: #6a1b9a;
  --md-code-bg: #f5f5f5;
  --md-code-border: #e0e0e0;
  --md-hover-bg: rgba(0,0,0,0.04);
}

/* Font switcher */
[data-font="sans"] { --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
[data-font="mono"] { --font-body: var(--font-mono); }

/* === Base === */
* { box-sizing: border-box; }

html {
  margin: 0;
  padding: 0;
  background: var(--md-surface);
  color: var(--md-on-surface);
}

body {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 1.25rem;
  min-height: 100vh;
  background: var(--md-surface);
  color: var(--md-on-surface);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--md-link); }
a:visited { color: var(--md-link-visited); }

h1, h2, h3, h4, h5 {
  margin: 1em 0 0.4em;
  line-height: 1.3;
}
h1 { font-size: 1.5em; }
h2 { font-size: 1.25em; }
h3 { font-size: 1.1em; }

pre, code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

pre {
  background: var(--md-code-bg);
  border: 1px solid var(--md-code-border);
  border-radius: var(--md-radius-sm);
  padding: 0.75rem;
  overflow-x: auto;
  max-width: fit-content;
}

code {
  background: var(--md-code-bg);
  border: 1px solid var(--md-code-border);
  border-radius: 4px;
  padding: 1px 4px;
}

blockquote {
  border-left: 3px solid var(--md-outline);
  margin: 0.5em 0;
  padding-left: 1em;
  font-style: italic;
  white-space: pre-wrap;
}

hr {
  border: none;
  border-top: 1px solid var(--md-outline-variant);
  margin: 1.5em 0;
}

img { max-width: 300px; }

details { margin-top: 1em; }
details summary { font-style: italic; cursor: pointer; }

iframe {
  width: 100%;
  height: 600px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-radius-sm);
}

/* === Header === */
.header { margin-bottom: 1em; }

.title {
  font-weight: 700;
  color: var(--md-primary);
  font-size: 1.15em;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-decoration: none;
  padding-right: 0.6em;
  letter-spacing: 0.02em;
}

.header-item {
  padding-right: 0.5em;
  text-decoration: underline;
  font-size: 0.95em;
}

/* === URL Bar === */
.url-form {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.url-input {
  flex-grow: 1;
  max-width: 60ch;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-sm);
  background: var(--md-surface);
  color: var(--md-on-surface);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.url-input:focus {
  outline: 2px solid var(--md-primary);
  outline-offset: -1px;
}

.url-submit, input[type="submit"] {
  padding: 0.4rem 1rem;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-sm);
  background: var(--md-surface-container);
  color: var(--md-on-surface);
  cursor: pointer;
  font-family: inherit;
}

.url-submit:hover, input[type="submit"]:hover {
  background: var(--md-hover-bg);
}

.logo {
  text-decoration: none;
  font-size: 0.85em;
}

/* === Link line === */
.link-line {
  font-size: 0.85em;
  margin-bottom: 0.4em;
}

.link-line a {
  text-decoration: none;
  padding-right: 0.4em;
  color: var(--md-outline);
}

.link-line a:hover { color: var(--md-link); }

/* === Content area === */
.content { margin-top: 1em; }

/* === Gemini / Scroll content === */
.gemini { margin: 1em 0; }
.gemini > * { margin: 0; }
.gemini > p { white-space: pre-wrap; }
.gemini span { font-size: smaller; color: var(--md-outline); }
.gemini a { line-height: 1.6; }
.gemini > blockquote { white-space: pre-wrap; }
.gemini .header-anchor {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}
.gemini .header-anchor:hover { text-decoration: underline; }
.gemini > ul { padding-left: 1.2em; }
.gemini > .input-line { margin-top: 5px; }
.gemini > .input-line .input-text {
  text-decoration: underline;
  font-size: medium;
}

/* === Gopher content === */
.gopher {
  white-space: pre;
  font-family: var(--font-mono);
  border-spacing: 0;
  font-size: 0.9em;
}

.gopher td {
  padding-right: 1em;
  border: 0;
  vertical-align: top;
}

.gopher td.type-description, .gopher td.mimetype {
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 20em;
  font-size: smaller;
  vertical-align: middle;
}

.gopher td.type-description img {
  height: 1.1em;
  vertical-align: middle;
}

.gopher td.info-link.empty { padding-right: 0; }
.gopher td.info-link a { text-decoration: none; color: var(--md-outline); }
.gopher span { font-size: smaller; color: var(--md-outline); }
.gopher td.query-form { white-space: normal; padding-top: 5px; }
.gopher td.display a { white-space: normal; }
.gopher td.query-form > form { display: inline-flex; align-items: center; }
.gopher td.query-form > form > * { margin-right: 5px; }
.gopher .input-text { text-decoration: underline; }

.gopher tr.selectable:hover { background: var(--md-hover-bg); }

/* Gopher+ */
.gopherp tr td:last-child {
  border-left: 1px solid var(--md-outline-variant);
  padding-left: 10px;
}
.gopherp tr td.invisible { border-left: 0; }

/* Nex */
.nex span { font-size: smaller; color: var(--md-outline); }

/* === Images === */
.inline-image { cursor: zoom-in; transition: max-width 0.2s ease; }
.inline-image.selected {
  max-width: 90vw;
  max-height: initial;
  cursor: zoom-out;
}

.inline-save { margin-bottom: 1em; }

/* === Protocol grid (home page) === */
.protocol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: 0.5rem 2rem;
  margin: 1.5em 0;
}

.protocol-grid h3 { margin-top: 0.5em; }
.protocol-grid ul { padding-left: 1.2em; }

/* === Response table === */
.response-table, .metadata-table {
  border: 0;
  border-collapse: collapse;
  margin: 0.5em 1em;
  font-size: 0.9em;
}

.response-table th, .metadata-table th {
  text-align: left;
  padding-right: 1em;
  vertical-align: top;
  white-space: nowrap;
}

.response-table td, .metadata-table td {
  padding: 0.25em 0.5em;
}

/* === Settings bar === */
.settings-bar {
  display: flex;
  gap: 1rem;
  font-size: 0.85em;
  margin: 0.75em 0;
  color: var(--md-outline);
}

.settings-bar select {
  font-family: inherit;
  font-size: inherit;
  padding: 0.15em 0.3em;
  border: 1px solid var(--md-outline-variant);
  border-radius: 4px;
  background: var(--md-surface);
  color: var(--md-on-surface);
}

/* === Footer === */
.site-footer {
  margin-top: 2em;
  padding-top: 0.5em;
  border-top: 1px solid var(--md-outline-variant);
  font-size: 0.8em;
  color: var(--md-outline);
}

/* === Responsive === */
@media (max-width: 600px) {
  body { padding: 0.75rem; }
  .protocol-grid { grid-template-columns: 1fr; }
  .url-input { max-width: 100%; }
  pre { font-size: 0.8em; }
  .gopher { font-size: 0.75em; }
  .gopher td { padding-right: 0.3em; }
}