/* ══════════════════════════════════════════════════════════════
   THEME VARIABLES
══════════════════════════════════════════════════════════════ */

:root {
  --bg:       #0a0a0a;
  --bg1:      #111111;
  --bg2:      #1a1a1a;
  --bg3:      #222222;
  --border:   #2a2a2a;
  --border2:  #333333;
  --text:     #d8d8d8;
  --dim:      #848484;
  --dim2:     #6a6a6a;
  --accent:   #4a9eff;
  --accent2:  #2a6acc;
  --green:    #4aff8a;
  --yellow:   #ffcc44;
  --red:      #ff4a4a;
  --orange:   #ff8a2a;
  --logo-color:          var(--accent);
  --btn-bg:              var(--accent2);
  --btn-border:          var(--accent);
  --btn-color:           #fff;
  --btn-hover-bg:        var(--accent);
  --radius:              0px;
  --card-radius:         0px;
  --body-font:           'Courier New', Courier, monospace;
  --filter-label-color:  var(--dim);
  --section-label-color: var(--dim);
  --citation-left:       var(--accent2);
  --progress-color:      var(--accent);
  --modal-top-border:    none;
  --modal-confirm-color: var(--yellow);
  --modal-confirm-border:var(--yellow);
  --correct-btn-color:   var(--yellow);
  --history-active-color:var(--accent);
  --history-active-bg:   var(--bg3);
  --tab-active-border:   var(--accent);
  --gap:                 0.5rem;
  --card-shadow:         0 2px 12px rgba(0,0,0,0.25);
}

/* ── evolve dark ── */
html[data-theme="evolve"] {
  --bg:       #141a14;
  --bg1:      #1a221a;
  --bg2:      #202a20;
  --bg3:      #273027;
  --border:   #2e3d2e;
  --border2:  #3a4e3a;
  --text:     #d6d6bc;
  --dim:      #708870;
  --dim2:     #587858;
  --accent:   #9aba7a;
  --accent2:  #6a8a4a;
  --green:    #6aaa8a;
  --yellow:   #d4ba7a;
  --red:      #aa6a6a;
  --orange:   #aa8a5a;
  --logo-color:          var(--accent);
  --btn-bg:              var(--bg3);
  --btn-border:          var(--border2);
  --btn-color:           var(--accent);
  --btn-hover-bg:        var(--bg2);
  --radius:              3px;
  --card-radius:         0px;
  --body-font:           system-ui, -apple-system, 'Segoe UI', sans-serif;
  --filter-label-color:  var(--yellow);
  --section-label-color: var(--yellow);
  --citation-left:       var(--accent);
  --progress-color:      var(--accent);
  --modal-top-border:    3px solid var(--yellow);
  --modal-confirm-color: var(--yellow);
  --modal-confirm-border:var(--yellow);
  --correct-btn-color:   var(--yellow);
  --history-active-color:var(--accent);
  --history-active-bg:   var(--bg3);
  --tab-active-border:   var(--accent);
  --card-shadow:         0 4px 20px rgba(0,0,0,0.5);
}

/* ── evolve light (warm parchment) ── */
html[data-theme="evolve-light"] {
  --bg:       #ddd5c8;
  --bg1:      #d3cab9;
  --bg2:      #c8bfae;
  --bg3:      #bdb4a4;
  --border:   #a89e90;
  --border2:  #97897a;
  --text:     #2c201a;
  --dim:      #6e5e50;
  --dim2:     #7a6a52;
  --accent:   #3d7a28;
  --accent2:  #2d5a1a;
  --green:    #2a7a4a;
  --yellow:   #7a5c0a;
  --red:      #8a2a2a;
  --orange:   #7a4a1a;
  --logo-color:          var(--accent);
  --btn-bg:              var(--bg3);
  --btn-border:          var(--border2);
  --btn-color:           var(--accent2);
  --btn-hover-bg:        var(--bg2);
  --radius:              3px;
  --card-radius:         0px;
  --body-font:           system-ui, -apple-system, 'Segoe UI', sans-serif;
  --filter-label-color:  var(--yellow);
  --section-label-color: var(--yellow);
  --citation-left:       var(--accent);
  --progress-color:      var(--accent);
  --modal-top-border:    3px solid var(--yellow);
  --modal-confirm-color: var(--yellow);
  --modal-confirm-border:var(--yellow);
  --correct-btn-color:   var(--yellow);
  --history-active-color:var(--accent);
  --history-active-bg:   var(--bg3);
  --tab-active-border:   var(--accent);
  --card-shadow:         0 4px 20px rgba(0,0,0,0.18);
}

/* ══════════════════════════════════════════════════════════════
   GLOBAL RESET + KEYFRAMES
══════════════════════════════════════════════════════════════ */

* { box-sizing: border-box; margin: 0; padding: 0; border-radius: var(--radius); }

@keyframes blink    { 50%{opacity:0} }
@keyframes reqShift {
  0%, 100% { color: var(--accent); border-color: var(--border2); }
  50%      { color: var(--green);  border-color: var(--accent);  }
}

/* ══════════════════════════════════════════════════════════════
   BODY + LAYOUT
══════════════════════════════════════════════════════════════ */

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body-font, 'Courier New', Courier, monospace);
  font-size: 14px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

html[data-theme="evolve"] body,
html[data-theme="evolve-light"] body {
  background-image: repeating-linear-gradient(
    0deg, transparent, transparent 2px, rgba(0,0,0,0.04) 2px, rgba(0,0,0,0.04) 4px
  );
}

#layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  padding: var(--gap);
  gap: var(--gap);
}

/* ══════════════════════════════════════════════════════════════
   HEADER
══════════════════════════════════════════════════════════════ */

#header {
  background: var(--bg1);
  border-bottom: 1px solid var(--border);
  padding: 0.45rem 0.85rem 0.45rem 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
}
html[data-theme="evolve"] #header,
html[data-theme="evolve-light"] #header {
  border-bottom-width: 2px;
  border-color: var(--border2);
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  height: 42px;
  padding: 0 0.9rem 0 0.3rem;
}

#header-logo {
  height: 2.25rem;
  width: auto;
  flex-shrink: 0;
}

#header .logo {
  color: var(--logo-color);
  font-size: 16px;
  margin-left: 0;
  font-weight: bold;
  letter-spacing: 2px;
  white-space: nowrap;
}
html[data-theme="evolve"] #header .logo,
html[data-theme="evolve-light"] #header .logo {
  font-size: 14px;
  letter-spacing: 0;
  padding-right: 0.9rem;
  border-right: 1px solid var(--border2);
}

#header .tagline { color: var(--dim); font-size: 12px; }
html[data-theme="evolve"] #header .tagline,
html[data-theme="evolve-light"] #header .tagline { font-style: italic; }
#header .spacer { flex: 1; }

#status-bar { font-size: 12px; color: var(--dim); }
#status-bar .ok  { color: var(--green); }
#status-bar .err { color: var(--red); }

/* ── request button ── */
#request-btn {
  background: none;
  border: 1px solid var(--border2);
  color: var(--accent);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.5px;
  padding: 0.2rem 0.65rem;
  cursor: pointer;
  animation: reqShift 8s ease-in-out infinite;
  white-space: nowrap;
}
html[data-theme="evolve"] #request-btn,
html[data-theme="evolve-light"] #request-btn { font-weight: 600; }
#request-btn:hover { opacity: 0.8; }
#sidebar-open { display: none; }

/* ══════════════════════════════════════════════════════════════
   SIDEBAR
══════════════════════════════════════════════════════════════ */

#sidebar {
  width: calc(240px + 2rem);
  min-width: calc(240px + 2rem);
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

/* ── sidebar tabs ── */
#sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
  flex-shrink: 0;
}
html[data-theme="evolve"] #sidebar-tabs,
html[data-theme="evolve-light"] #sidebar-tabs { border-bottom-width: 2px; border-color: var(--border2); }

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--dim);
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.5px;
  padding: 0.5rem 0.25rem;
  cursor: pointer;
  text-transform: uppercase;
  transition: color 0.15s, border-color 0.15s;
  margin-bottom: -1px;
}
html[data-theme="evolve"] .tab-btn,
html[data-theme="evolve-light"] .tab-btn { font-weight: 600; font-size: 11px; letter-spacing: 1px; margin-bottom: -2px; }
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--tab-active-border); border-bottom-color: var(--tab-active-border); }

/* ── tab panels ── */
.tab-panel { display: none; flex: 1; overflow-y: auto; flex-direction: column; }
.tab-panel.active { display: flex; }

/* ── history tab ── */
#history-list { flex: 1; overflow-y: auto; padding: 0.25rem 0; }

.history-item {
  padding: 0.4rem 0.65rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  color: var(--dim);
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background 0.1s, color 0.1s;
}
html[data-theme="evolve"] .history-item,
html[data-theme="evolve-light"] .history-item { border-left: 3px solid transparent; padding: 0.45rem 0.75rem; }
.history-item:hover { background: var(--bg2); color: var(--text); }
html[data-theme="evolve"] .history-item:hover,
html[data-theme="evolve-light"] .history-item:hover { border-left-color: var(--border2); }
.history-item.active { background: var(--history-active-bg); color: var(--history-active-color); }
html[data-theme="evolve"] .history-item.active,
html[data-theme="evolve-light"] .history-item.active { border-left-color: var(--accent); }
.history-item .ts { display: block; font-size: 11px; color: var(--dim2); }
#history-empty { padding: 0.75rem 0.65rem; color: var(--dim2); font-size: 13px; }
html[data-theme="evolve"] #history-empty,
html[data-theme="evolve-light"] #history-empty { font-style: italic; font-size: 13px; }

/* ── settings tab ── */
.settings-section { padding: 0.65rem 0.75rem; border-bottom: 1px solid var(--border); }

.settings-label {
  color: var(--dim);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
  display: block;
}
html[data-theme="evolve"] .settings-label,
html[data-theme="evolve-light"] .settings-label { color: var(--accent); font-weight: 600; }

#settings-theme-select {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  padding: 0.3rem 0.4rem;
  outline: none;
  cursor: pointer;
}
html[data-theme="evolve"] #settings-theme-select,
html[data-theme="evolve-light"] #settings-theme-select { background: var(--bg); border-bottom: 2px solid var(--border2); }
#settings-theme-select:focus { border-color: var(--accent); }

/* ── DEVELOPER: Theme control visibility ──────────────────────────────────────
   Default: show seg-toggle only, hide dropdown.
   To swap: set #theme-dropdown-row { display: flex } and #evolve-mode-row { display: none }
───────────────────────────────────────────────────────────────────────────── */
#theme-dropdown-row { display: none; }
#evolve-mode-row { display: none; }
html[data-theme="evolve"] #evolve-mode-row,
html[data-theme="evolve-light"] #evolve-mode-row { display: block; }

.seg-toggle { display: flex; }
.seg-btn {
  flex: 1;
  background: var(--bg2);
  border: 1px solid var(--border2);
  color: var(--dim);
  font-family: inherit;
  font-size: 12px;
  padding: 0.28rem 0;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
  letter-spacing: 0.5px;
}
.seg-btn + .seg-btn { border-left: none; }
.seg-btn.active { background: var(--accent2); border-color: var(--accent); color: #fff; }
html[data-theme="evolve-light"] .seg-btn.active { color: var(--bg); }
.seg-btn:hover:not(.active) { color: var(--text); background: var(--bg3); }

#adv-toggle {
  background: none; border: none;
  color: var(--dim);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 0; cursor: pointer;
  display: flex; align-items: center; gap: 0.3rem;
  width: 100%; text-align: left;
}
#adv-toggle:hover { color: var(--text); }
html[data-theme="evolve"] #adv-toggle,
html[data-theme="evolve-light"] #adv-toggle { color: var(--accent); font-weight: 600; }
#adv-arrow { transition: transform 0.2s; display: inline-block; }
#adv-arrow.open { transform: rotate(90deg); }
#adv-content { display: none; margin-top: 0.5rem; }
#adv-content.open { display: block; }
.adv-row {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 0.4rem; font-size: 12px; color: var(--dim);
}
.adv-row input[type="number"] {
  width: 52px; background: var(--bg2); border: 1px solid var(--border2);
  color: var(--text); font-family: inherit; font-size: 12px;
  padding: 0.15rem 0.3rem; text-align: right; outline: none;
}
.adv-row input[type="checkbox"] { accent-color: var(--accent); cursor: pointer; }

/* ── about tab ── */
.about-content { padding: 0.75rem; display: flex; flex-direction: column; gap: 0.9rem; }

#bio-photo {
  width: 100%;
  max-height: 140px;
  object-fit: cover;
  border: 1px solid var(--border2);
  display: none;
}
html[data-theme="evolve"] #bio-photo,
html[data-theme="evolve-light"] #bio-photo { border-left: 3px solid var(--accent); }

.about-section-label {
  color: var(--dim);
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}
html[data-theme="evolve"] .about-section-label,
html[data-theme="evolve-light"] .about-section-label { color: var(--accent); font-weight: 600; }

.about-text { color: var(--dim); font-size: 14px; line-height: 1.6; }
html[data-theme="evolve"] .about-text,
html[data-theme="evolve-light"] .about-text { font-size: 14px; }

.how-to-list { list-style: none; padding: 0; margin: 0; }
.how-to-list li {
  color: var(--dim);
  font-size: 14px;
  line-height: 1.6;
  padding: 0.2rem 0;
  padding-left: 1.2rem;
  position: relative;
}
html[data-theme="evolve"] .how-to-list li,
html[data-theme="evolve-light"] .how-to-list li { font-size: 14px; }
.how-to-list li::before {
  content: attr(data-n)".";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}

/* ══════════════════════════════════════════════════════════════
   MAIN PANEL
══════════════════════════════════════════════════════════════ */

#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
}

/* ── query panel ── */
#query-panel {
  background: var(--bg1);
  border-bottom: 1px solid var(--border);
  padding: 0.55rem 0.75rem;
  flex-shrink: 0;
}
html[data-theme="evolve"] #query-panel,
html[data-theme="evolve-light"] #query-panel { background: var(--bg2); border-bottom: 2px solid var(--border2); padding: 0.65rem 0.85rem; }

#query-row { display: flex; gap: 0.4rem; align-items: flex-start; }

#query-input {
  flex: 1;
  background: var(--bg2);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  padding: 0.4rem 0.5rem;
  resize: none;
  outline: none;
  min-height: 38px;
  max-height: 120px;
  overflow-y: auto;
}
html[data-theme="evolve"] #query-input,
html[data-theme="evolve-light"] #query-input { background: var(--bg); border-bottom: 2px solid var(--border2); transition: border-color 0.2s; }
#query-input:focus { border-color: var(--accent2); }
html[data-theme="evolve"] #query-input:focus,
html[data-theme="evolve-light"] #query-input:focus { border-color: var(--accent); }
#query-input::placeholder { color: var(--dim2); font-style: italic; }

#submit-btn {
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  color: var(--btn-color);
  font-family: inherit;
  font-size: 13px;
  padding: 0.4rem 0.85rem;
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: 1px;
  height: 38px;
  transition: background 0.1s, color 0.1s;
}
html[data-theme="evolve"] #submit-btn,
html[data-theme="evolve-light"] #submit-btn { background: var(--bg3); border-color: var(--border2); border-bottom: 3px solid var(--dim2); font-weight: 600; transition: background 0.15s, border-bottom-color 0.15s, transform 0.05s; }
#submit-btn:hover:not(:disabled) { background: var(--btn-hover-bg); }
html[data-theme="evolve"] #submit-btn:hover:not(:disabled),
html[data-theme="evolve-light"] #submit-btn:hover:not(:disabled) { border-bottom-color: var(--accent); }
html[data-theme="evolve"] #submit-btn:active:not(:disabled),
html[data-theme="evolve-light"] #submit-btn:active:not(:disabled) { transform: translateY(1px); border-bottom-width: 2px; }
#submit-btn:disabled { opacity: 0.4; cursor: default; }

#filter-row { display: flex; gap: 0.5rem; margin-top: 0.4rem; align-items: center; }
html[data-theme="evolve"] #filter-row,
html[data-theme="evolve-light"] #filter-row { background: var(--bg); border: 1px solid var(--border); padding: 0.3rem 0.6rem; margin-top: 0.5rem; }
.filter-label { color: var(--filter-label-color); font-size: 12px; }
html[data-theme="evolve"] .filter-label,
html[data-theme="evolve-light"] .filter-label { font-size: 11px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; }
select.filter {
  background: var(--bg2); border: 1px solid var(--border2);
  color: var(--text); font-family: inherit; font-size: 13px;
  padding: 0.2rem 0.4rem; outline: none;
}
html[data-theme="evolve"] select.filter,
html[data-theme="evolve-light"] select.filter { background: var(--bg1); font-size: 13px; }
select.filter:focus { border-color: var(--accent2); }

/* ══════════════════════════════════════════════════════════════
   TOOLTIP SYSTEM
══════════════════════════════════════════════════════════════ */

#tooltip {
  position: fixed;
  display: none;
  z-index: 9999;
  pointer-events: none;
  background: var(--bg3);
  border: 1px solid var(--accent);
  color: var(--text);
  font-family: var(--body-font, 'Courier New', Courier, monospace);
  font-size: 13px;
  padding: 0.3rem 0.7rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  max-width: 360px;
  white-space: pre-wrap;
  word-break: break-word;
  border-radius: var(--radius);
  letter-spacing: 0.2px;
}
html[data-theme="evolve-light"] #tooltip { box-shadow: 0 2px 10px rgba(0,0,0,0.15); }

/* ══════════════════════════════════════════════════════════════
   LLM CHAT WINDOW STYLES
   (response text, citations)
   Edit this section to change the output display independently.
══════════════════════════════════════════════════════════════ */

#chat-window {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
html[data-theme="evolve"] #chat-window,
html[data-theme="evolve-light"] #chat-window { padding: 0.75rem 0.85rem; }

/* progress + error live inside chat-window */
#progress { display: none; color: var(--progress-color); font-size: 13px; padding: 0.5rem 0; }
html[data-theme="evolve"] #progress,
html[data-theme="evolve-light"] #progress { padding: 0.5rem 0.75rem; background: var(--bg2); border: 1px solid var(--border); border-left: 3px solid var(--accent); font-family: 'Courier New', monospace; }
.spinner { animation: blink 0.8s step-end infinite; }

#error-msg { display: none; color: var(--red); background: var(--bg2); border: 1px solid var(--red); padding: 0.5rem 0.65rem; font-size: 13px; }
html[data-theme="evolve"] #error-msg,
html[data-theme="evolve-light"] #error-msg { border-left: 4px solid var(--red); }

/* result card */
.result-card { display: flex; flex-direction: column; gap: 0.4rem; }

.section-label {
  color: var(--section-label-color);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 0.15rem;
}
html[data-theme="evolve"] .section-label,
html[data-theme="evolve-light"] .section-label { font-weight: 600; }

.response-text {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 0.65rem 0.75rem;
  line-height: 1.65;
  color: var(--text);
  font-size: 14px;
  display: flex;
  flex-direction: column;
}
html[data-theme="evolve"] .response-text,
html[data-theme="evolve-light"] .response-text { border-left: 4px solid #6a8aaa; padding: 0.75rem 0.85rem; line-height: 1.75; }

/* text+citation pairs — each block groups the bullets it cites */
.response-block { display: flex; flex-direction: column; }
.response-block + .response-block { margin-top: 0.6rem; }
.block-text { white-space: pre-wrap; }

/* fail response message */
.fail-msg {
  color: var(--dim);
  font-style: italic;
  margin: 0.25rem 0;
}

/* single-line citation rows — rendered inline at [[SRC_N]] positions */
.citation-line {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--citation-left);
  padding: 0.22rem 0.5rem 0.22rem 0.6rem;
  font-size: 12px;
  min-width: 0;
  margin: 0.15rem 0 0 0;
}
html[data-theme="evolve"] .citation-line,
html[data-theme="evolve-light"] .citation-line { border-left-width: 4px; }

/* relevance gradient — brightest left border = closest match */
.citation-line.dist-close { border-left-color: var(--accent); }
.citation-line.dist-mid   { border-left-color: var(--dim);    }
.citation-line.dist-far   { border-left-color: var(--dim2);   }

.cit-file {
  color: var(--accent);
  font-weight: bold;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 38%;
  flex-shrink: 1;
  min-width: 0;
  cursor: help;
}
html[data-theme="evolve"] .cit-file,
html[data-theme="evolve-light"] .cit-file { color: var(--accent2); }

.cit-color-bar { display: inline-block; width: 3px; align-self: stretch; border-radius: 2px; margin-right: 2px; flex-shrink: 0; }
.cit-sep   { color: var(--dim2); flex-shrink: 0; }
.cit-meta  { color: var(--dim); white-space: nowrap; flex-shrink: 0; cursor: help; }
.cit-meta span { color: var(--text); }
.cit-section   { font-weight: bold; }
.cit-file a    { color: inherit; text-decoration: none; }
.cit-file a:hover { text-decoration: underline; opacity: 1; }
.cit-corr  { color: var(--orange); font-size: 11px; white-space: nowrap; flex-shrink: 0; }
.cit-spacer { flex: 1; }
.cit-dist {
  color: var(--dim2);
  white-space: nowrap;
  flex-shrink: 0;
  cursor: help;
  font-size: 11px;
}
html[data-theme="evolve"] .cit-dist,
html[data-theme="evolve-light"] .cit-dist { font-family: 'Courier New', monospace; }

.correct-btn {
  background: var(--bg3);
  border: 1px solid var(--border2);
  color: var(--correct-btn-color);
  font-family: inherit;
  font-size: 11px;
  padding: 0.1rem 0.4rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.1s, border-color 0.1s, color 0.15s;
}
html[data-theme="evolve"] .correct-btn,
html[data-theme="evolve-light"] .correct-btn { border-bottom: 2px solid var(--dim2); }
html[data-theme="evolve"] .correct-btn:hover:not(:disabled),
html[data-theme="evolve-light"] .correct-btn:hover:not(:disabled) { background: var(--bg2); border-bottom-color: var(--yellow); }
.correct-btn:hover:not(:disabled) { background: var(--bg2); border-color: var(--yellow); }

.correct-btn.flagged,
.correct-btn.flagged:hover {
  color: #7a1515 !important;
  border-color: #7a1515 !important;
  border-bottom-color: #7a1515 !important;
  background: transparent !important;
  opacity: 0.65;
  cursor: default;
}

/* ── disclaimer footer ── */
#disclaimer {
  flex-shrink: 0;
  padding: 0.35rem 0.85rem;
  padding-bottom: max(0.35rem, env(safe-area-inset-bottom));
  color: var(--dim);
  font-size: 13px;
  font-style: italic;
  border-top: 1px solid var(--border);
  background: var(--bg1);
  line-height: 1.4;
}
html[data-theme="evolve"] #disclaimer,
html[data-theme="evolve-light"] #disclaimer { border-top-width: 2px; border-color: var(--border2); }

/* ══════════════════════════════════════════════════════════════
   CORRECTION MODAL
══════════════════════════════════════════════════════════════ */

#modal-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
#modal-overlay.visible { display: flex; }
#modal {
  background: var(--bg1);
  border: 1px solid var(--border2);
  border-top: var(--modal-top-border);
  padding: 1rem;
  min-width: 380px;
  max-width: 520px;
}
html[data-theme="evolve"] #modal,
html[data-theme="evolve-light"] #modal { box-shadow: 0 8px 32px rgba(0,0,0,0.25); }

#modal h3 { color: var(--modal-confirm-color); font-size: 13px; letter-spacing: 1px; margin-bottom: 0.65rem; text-transform: uppercase; }
html[data-theme="evolve"] #modal h3,
html[data-theme="evolve-light"] #modal h3 { font-size: 14px; font-weight: 600; }

#modal .modal-info { color: var(--dim); font-size: 12px; margin-bottom: 0.65rem; line-height: 1.5; }
html[data-theme="evolve"] #modal .modal-info,
html[data-theme="evolve-light"] #modal .modal-info { font-family: 'Courier New', monospace; font-size: 13px; margin-bottom: 0.75rem; }
#modal .modal-info span { color: var(--text); }
#modal label { color: var(--dim); font-size: 12px; display: block; margin-bottom: 0.25rem; }
html[data-theme="evolve"] #modal label,
html[data-theme="evolve-light"] #modal label { font-size: 11px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; }

#modal-input {
  width: 100%;
  background: var(--bg2); border: 1px solid var(--border2);
  color: var(--text); font-family: inherit; font-size: 14px;
  padding: 0.4rem 0.5rem; outline: none; margin-bottom: 0.65rem;
}
html[data-theme="evolve"] #modal-input,
html[data-theme="evolve-light"] #modal-input { background: var(--bg); border-bottom: 2px solid var(--border2); font-family: 'Courier New', monospace; margin-bottom: 0.85rem; padding: 0.45rem 0.5rem; }
#modal-input:focus { border-color: var(--modal-confirm-border); }

.modal-btns { display: flex; gap: 0.5rem; justify-content: flex-end; }
.modal-btn { background: var(--bg3); border: 1px solid var(--border2); color: var(--text); font-family: inherit; font-size: 13px; padding: 0.32rem 0.85rem; cursor: pointer; transition: background 0.1s; }
html[data-theme="evolve"] .modal-btn,
html[data-theme="evolve-light"] .modal-btn { font-weight: 500; border-bottom: 2px solid var(--dim2); }
.modal-btn:hover { background: var(--bg2); }
.modal-btn.confirm { border-color: var(--modal-confirm-border); color: var(--modal-confirm-color); }
html[data-theme="evolve"] .modal-btn.confirm,
html[data-theme="evolve-light"] .modal-btn.confirm { border-bottom-color: var(--yellow); }

/* ══════════════════════════════════════════════════════════════
   REQUEST MODAL
══════════════════════════════════════════════════════════════ */

#req-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.7); z-index: 100;
  align-items: center; justify-content: center;
}
#req-overlay.visible { display: flex; }

#req-modal {
  background: var(--bg1);
  border: 1px solid var(--border2);
  border-top: var(--modal-top-border);
  padding: 1rem;
  min-width: 360px;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
html[data-theme="evolve"] #req-modal,
html[data-theme="evolve-light"] #req-modal { box-shadow: 0 8px 32px rgba(0,0,0,0.25); }

#req-modal h3 {
  color: var(--modal-confirm-color);
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.2rem;
}
html[data-theme="evolve"] #req-modal h3,
html[data-theme="evolve-light"] #req-modal h3 { font-size: 14px; font-weight: 600; }

.req-desc { color: var(--dim); font-size: 13px; line-height: 1.5; margin-bottom: 0.3rem; }
.req-opt  { color: var(--dim2); font-size: 12px; }
.req-required { color: var(--red); }

#req-modal label {
  color: var(--dim);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 0.2rem;
  display: block;
}

#req-modal input,
#req-modal textarea {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  padding: 0.35rem 0.45rem;
  outline: none;
}
html[data-theme="evolve"] #req-modal input,
html[data-theme="evolve-light"] #req-modal input,
html[data-theme="evolve"] #req-modal textarea,
html[data-theme="evolve-light"] #req-modal textarea { background: var(--bg); border-bottom: 2px solid var(--border2); }
#req-modal input:focus,
#req-modal textarea:focus { border-color: var(--modal-confirm-border); }
#req-modal textarea { resize: vertical; min-height: 72px; }

#req-status { font-size: 12px; min-height: 1.2em; margin-top: 0.2rem; }
#req-status.ok  { color: var(--green); }
#req-status.err { color: var(--red); }

/* ── scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); }

/* ── hyperlinks ── */
a { color: var(--accent); text-decoration: underline; }
a:hover { opacity: 0.8; }

/* ══════════════════════════════════════════════════════════════
   STANDARDS PAGE (/standards)
══════════════════════════════════════════════════════════════ */

#std-layout {
  flex: 1;
  overflow-y: auto;
  padding: var(--gap);
  background: var(--bg);
}
#std-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}
.std-title {
  font-size: 18px;
  font-weight: bold;
  color: var(--accent);
  letter-spacing: 1px;
  margin-bottom: 0.4rem;
}
html[data-theme="evolve"] .std-title,
html[data-theme="evolve-light"] .std-title { letter-spacing: 0.5px; }
.std-desc {
  color: var(--dim);
  font-size: 12px;
  margin-bottom: 1.2rem;
}
#std-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
#std-table th {
  text-align: left;
  color: var(--dim);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-bottom: 2px solid var(--border2);
  padding: 0.4rem 0.6rem;
}
#std-table td {
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
  word-break: break-word;
}
#std-table tr:hover td { background: var(--bg2); }
.std-loading {
  color: var(--dim);
  font-style: italic;
  padding: 1rem 0.6rem;
}
.back-btn {
  font-size: 12px;
  color: var(--dim);
  text-decoration: none;
  border: 1px solid var(--border2);
  padding: 0.2rem 0.6rem;
  margin-right: 0.5rem;
  white-space: nowrap;
}
.back-btn:hover { color: var(--text); opacity: 1; }
html[data-theme="evolve"] .back-btn,
html[data-theme="evolve-light"] .back-btn { border-radius: var(--radius); }
html[data-theme="evolve"] ::-webkit-scrollbar-thumb,
html[data-theme="evolve-light"] ::-webkit-scrollbar-thumb { border-radius: 3px; }


/* ── Sidebar footer (mobile only) ───────────────────────────── */
#sidebar-footer { display: none; }

/* ── Mobile nav (hidden on desktop) ─────────────────────────── */
#mobile-nav    { display: none; }
#sidebar-close { display: none; }
#sidebar-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 299;
  display: none;
}
#sidebar-backdrop.visible { display: block; }

@media (max-width: 680px) {
  /* Header: only logo, title, hamburger */
  #header { flex-wrap: nowrap; padding: 0.4rem 0.6rem; }
  .tagline    { display: none; }
  .spacer     { display: none; }
  #status-bar { display: none; }
  #request-btn { display: none; }
  #mobile-nav  { display: none; }

  /* Hamburger open button */
  #sidebar-open {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid var(--border2);
    color: var(--dim);
    font-size: 1.2rem;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    flex-shrink: 0;
  }
  #sidebar-open:hover { color: var(--text); }

  /* Sidebar → fixed left drawer */
  #sidebar {
    position: fixed;
    top: 0; left: -105%;
    height: 100%;
    width: min(85vw, 300px);
    z-index: 300;
    transition: left 0.22s ease;
    border-radius: 0;
    overflow-y: auto;
  }
  #sidebar.open { left: 0; }

  /* Close button at top of drawer */
  #sidebar-close {
    display: flex;
    justify-content: flex-end;
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: none;
    border: none;
    color: var(--dim);
    font-size: 1.25rem;
    cursor: pointer;
    flex-shrink: 0;
  }
  #sidebar-close:hover { color: var(--text); }

  /* Layout — full width, no sidebar column */
  #layout { padding: 0.25rem; gap: 0; }

  /* Filter row wraps on narrow screens */
  #filter-row { flex-wrap: wrap; }

  /* Prevent iOS auto-zoom on textarea focus */
  #query-input { font-size: 16px; }

  /* Request button at bottom of sidebar drawer */
  #sidebar-footer {
    display: flex;
    margin-top: auto;
    padding: 0.75rem;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
  }
  #sidebar-request-btn {
    flex: 1;
    background: none;
    border: 1px solid var(--border2);
    color: var(--accent);
    font-family: inherit;
    font-size: 11px;
    letter-spacing: 0.5px;
    padding: 0.2rem 0.65rem;
    cursor: pointer;
    white-space: nowrap;
  }
  html[data-theme="evolve"] #sidebar-request-btn,
  html[data-theme="evolve-light"] #sidebar-request-btn { font-weight: 600; }
  #sidebar-request-btn:hover { opacity: 0.8; }
}

/* ══════════════════════════════════════════════════════════════
   STANDARDS PAGE (standards.html)
══════════════════════════════════════════════════════════════ */

#std-layout {
  flex: 1;
  display: flex;
  flex-direction: row;
  overflow: hidden;
}
#std-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 2rem;
  max-width: 720px;
}
#std-sidebar {
  width: 260px;
  flex-shrink: 0;
  overflow-y: auto;
  padding: 1.5rem 1.5rem 1.5rem 1.5rem;
  border-left: 1px solid var(--border);
}
#std-sidebar .std-subtitle {
  font-size: 14px;
  line-height: 1.4;
}
.std-title {
  font-size: 18px;
  font-weight: bold;
  letter-spacing: 1px;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.std-subtitle {
  color: var(--dim);
  font-size: 12px;
  margin-bottom: 1.8rem;
}
.std-jurisdiction {
  font-size: 13px;
  font-weight: bold;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text);
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid var(--border);
}
.std-state {
  font-size: 11px;
  font-weight: bold;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--dim);
  margin-top: 1.1rem;
  margin-bottom: 0.3rem;
  padding-left: 1rem;
}
.std-locality {
  font-size: 11px;
  font-weight: bold;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--dim);
  margin-top: 0.8rem;
  margin-bottom: 0.2rem;
  padding-left: 2rem;
}
.std-agency {
  font-size: 11px;
  font-weight: bold;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 0.9rem;
  margin-bottom: 0.3rem;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid var(--border);
}
.std-jurisdiction + .std-state + .std-agency,
.std-jurisdiction + .std-agency {
  padding-left: 1rem;
}
.std-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.std-list.indent-1 { padding-left: 1rem; }
.std-list.indent-2 { padding-left: 2rem; }
.std-list.indent-3 { padding-left: 3rem; }
.std-list li {
  font-size: 13px;
  color: var(--text);
  padding: 0.22rem 0;
}
.std-list li::before {
  content: '•';
  color: var(--dim2);
  margin-right: 0.5rem;
}
.std-list a {
  color: var(--text);
  text-decoration: none;
}
.std-list a:hover {
  text-decoration: underline;
  color: var(--accent);
}
.std-copyright {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--dim2);
  font-size: 11px;
  font-style: italic;
  line-height: 1.6;
}
#std-error {
  color: var(--dim);
  font-size: 13px;
  font-style: italic;
}