/* ------------------------------------------------------------------ */
/* Reset & base                                                         */
/* ------------------------------------------------------------------ */

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

:root {
  --bg:        #0f0f11;
  --surface:   #18181c;
  --border:    #2a2a30;
  --border-hi: #3e3e48;
  --text:      #e8e8f0;
  --muted:     #7a7a8c;
  --accent:    #7c6dfa;
  --accent-hi: #9585ff;
  --success:   #22c55e;
  --warn:      #f59e0b;
  --danger:    #ef4444;
  --radius:    10px;
  --radius-sm: 6px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
}

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  min-height: 100vh;
}

/* ------------------------------------------------------------------ */
/* Layout                                                               */
/* ------------------------------------------------------------------ */

.page {
  max-width: 680px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* ------------------------------------------------------------------ */
/* Header                                                               */
/* ------------------------------------------------------------------ */

header { text-align: center; margin-bottom: 2.5rem; }

h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 30%, var(--accent-hi));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  margin-top: .4rem;
  color: var(--muted);
  font-size: .95rem;
}

/* ------------------------------------------------------------------ */
/* Header row (title + info button)                                    */
/* ------------------------------------------------------------------ */

.header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.info-btn {
  flex-shrink: 0;
  background: none;
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-sm);
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font);
  font-size: .8rem;
  padding: .35rem .8rem;
  transition: border-color .15s, color .15s;
  white-space: nowrap;
  margin-top: .3rem;
}
.info-btn:hover {
  border-color: var(--accent);
  color: var(--accent-hi);
}

/* ------------------------------------------------------------------ */
/* Modal                                                                */
/* ------------------------------------------------------------------ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(3px);
  z-index: 100;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem 1rem 2rem;
  overflow-y: auto;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius);
  width: 100%;
  max-width: 720px;
  animation: fadeIn .18s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 1.6rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -.01em;
}

.modal-close {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: .2rem .4rem;
  border-radius: var(--radius-sm);
}
.modal-close:hover { color: var(--text); background: var(--border); }

.modal-body {
  padding: 1.4rem 1.6rem 1.8rem;
  overflow-y: auto;
}

.modal-intro {
  font-size: .9rem;
  color: var(--muted);
  margin-bottom: 1.4rem;
  line-height: 1.7;
}
.modal-intro strong { color: var(--text); }

.info-section {
  margin-bottom: 1.8rem;
}

.info-section h3 {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .8rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--border);
}

.info-section p {
  font-size: .85rem;
  color: var(--muted);
  line-height: 1.6;
}
.info-section p strong { color: var(--text); }

/* Score pills */
.score-pills {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-top: .6rem;
}
.score-pill {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .05em;
  padding: .2rem .65rem;
  border-radius: 99px;
}
.score-pill.high   { background: #14532d; color: var(--success); }
.score-pill.medium { background: #451a03; color: var(--warn); }
.score-pill.low    { background: #1e1b4b; color: #818cf8; }

/* Scoring pipeline */
.scoring-pipeline {
  display: flex;
  align-items: flex-start;
  gap: .4rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.pipeline-step {
  flex: 1;
  min-width: 120px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .6rem .8rem;
}

.pipeline-label {
  font-size: .72rem;
  font-weight: 700;
  color: var(--accent-hi);
  margin-bottom: .25rem;
  letter-spacing: .02em;
}

.pipeline-desc {
  font-size: .72rem;
  color: var(--muted);
  line-height: 1.4;
}

.pipeline-arrow {
  color: var(--border-hi);
  font-size: 1rem;
  align-self: center;
  flex-shrink: 0;
  padding-top: .2rem;
}

/* Scoring example */
.scoring-example {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.example-label {
  font-size: .72rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg);
  padding: .45rem .8rem;
  border-bottom: 1px solid var(--border);
}

.example-rows { padding: .3rem 0; }

.example-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: .5rem;
  padding: .3rem .8rem;
  font-size: .75rem;
  align-items: center;
}

.example-row + .example-row { border-top: 1px solid var(--border); }

.example-total {
  background: rgba(124,109,250,.06);
  border-top: 1px solid var(--border) !important;
}

.example-cat {
  font-family: var(--mono);
  color: var(--muted);
  font-size: .7rem;
}

.example-conf {
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .05em;
  padding: .1rem .4rem;
  border-radius: 99px;
}
.example-conf.high   { background: #14532d; color: var(--success); }
.example-conf.medium { background: #451a03; color: var(--warn); }
.example-conf.low    { background: #1e1b4b; color: #818cf8; }

.example-pts {
  font-size: .75rem;
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
  text-align: right;
}
.example-total .example-pts strong { color: var(--accent-hi); }

/* Bucket rows */
.bucket-rows { display: flex; flex-direction: column; gap: .55rem; }
.bucket-row {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  font-size: .85rem;
  color: var(--muted);
  line-height: 1.5;
}
.bucket-row strong { color: var(--text); }
.bucket-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: .35rem;
}
.bucket-dot.platform-assisted { background: #a78bfa; }
.bucket-dot.ai-assisted       { background: #34d399; }
.bucket-dot.no-signals        { background: var(--muted); }
.bucket-dot.unknown           { background: var(--border-hi); }

/* Platform cards grid */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: .8rem;
}

.platform-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .8rem 1rem;
}

.platform-name {
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent-hi);
  margin-bottom: .5rem;
  letter-spacing: .02em;
}

.platform-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.platform-card li {
  font-size: .75rem;
  color: var(--muted);
  line-height: 1.45;
  padding-left: .7rem;
  position: relative;
}
.platform-card li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--border-hi);
}
.platform-card li em {
  color: var(--success);
  font-style: normal;
  font-size: .68rem;
}

/* Heuristic table */
.heuristic-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .78rem;
}
.heuristic-table thead th {
  background: var(--bg);
  color: var(--muted);
  font-weight: 600;
  font-size: .72rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: .5rem .8rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.heuristic-table td {
  padding: .5rem .8rem;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  vertical-align: top;
  max-width: none;
  white-space: normal;
}
.heuristic-table tbody tr:last-child td { border-bottom: none; }
.heuristic-table td:first-child { color: var(--text); font-weight: 600; white-space: nowrap; }
.heuristic-table td:nth-child(3) { color: var(--text); font-weight: 700; text-align: center; white-space: nowrap; }

/* ------------------------------------------------------------------ */
/* Tabs                                                                 */
/* ------------------------------------------------------------------ */

.tabs {
  display: flex;
  gap: .5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.tab {
  background: none;
  border: none;
  color: var(--muted);
  font-size: .9rem;
  font-family: var(--font);
  padding: .5rem 1rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .15s, border-color .15s;
}

.tab:hover { color: var(--text); }

.tab.active {
  color: var(--accent-hi);
  border-bottom-color: var(--accent-hi);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ------------------------------------------------------------------ */
/* Single URL form                                                      */
/* ------------------------------------------------------------------ */

.input-row {
  display: flex;
  gap: .6rem;
}

input[type="url"],
input[type="text"] {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--mono);
  font-size: .9rem;
  padding: .65rem 1rem;
  outline: none;
  transition: border-color .15s;
}

input[type="url"]:focus,
input[type="text"]:focus {
  border-color: var(--accent);
}

button[type="submit"],
.btn-primary {
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
  font-family: var(--font);
  font-size: .9rem;
  font-weight: 600;
  padding: .65rem 1.4rem;
  transition: background .15s, opacity .15s;
  white-space: nowrap;
}

button[type="submit"]:hover,
.btn-primary:hover { background: var(--accent-hi); }
button[type="submit"]:disabled,
.btn-primary:disabled { opacity: .4; cursor: not-allowed; }

.btn-ghost {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: .85rem;
  padding: .2rem .5rem;
  border-radius: var(--radius-sm);
}
.btn-ghost:hover { color: var(--text); background: var(--border); }

/* ------------------------------------------------------------------ */
/* Single URL result card                                               */
/* ------------------------------------------------------------------ */

.result-card {
  margin-top: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  animation: fadeIn .2s ease;
}

.result-card.loading {
  display: flex;
  align-items: center;
  gap: .8rem;
  color: var(--muted);
}

.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--border-hi);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.result-platform {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -.02em;
}

.result-platform.unknown { color: var(--muted); font-size: 1.1rem; }

.badge {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .15rem .5rem;
  border-radius: 99px;
  margin-left: .5rem;
  vertical-align: middle;
}
.badge-high   { background: #14532d; color: var(--success); }
.badge-medium { background: #451a03; color: var(--warn); }
.badge-low    { background: #1e1b4b; color: #818cf8; }
.badge-none   { background: var(--border); color: var(--muted); }

/* Four-bucket result card */
.bucket-label {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -.02em;
}
.bucket-icon { font-size: 1.4rem; line-height: 1; }

.bucket-platform-assisted { color: #a78bfa; }
.bucket-ai-assisted       { color: #34d399; }
.bucket-no-ai-signals     { color: var(--muted); }
.bucket-unknown           { color: var(--muted); }

/* Score inline — shown next to confidence badge */
.score-inline {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  font-family: var(--mono);
  padding: .2rem .55rem;
  border-radius: 99px;
  background: rgba(255,255,255,.06);
  color: var(--muted);
  border: 1px solid var(--border-hi);
  vertical-align: middle;
}

/* Platform name pill — shown inline next to bucket label */
.platform-pill {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: .2rem .65rem;
  border-radius: 99px;
  background: rgba(167,139,250,.18);
  color: #c4b5fd;
  border: 1px solid rgba(167,139,250,.35);
  vertical-align: middle;
}

.result-sub {
  margin-top: .3rem;
  font-size: .82rem;
  color: var(--muted);
}

.signals-section { margin-top: 1rem; }
.signals-section + .signals-section { margin-top: .8rem; }

.signals-section-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .4rem;
}

.result-url {
  margin-top: .3rem;
  font-size: .8rem;
  color: var(--muted);
  font-family: var(--mono);
  word-break: break-all;
}

.signals-toggle {
  margin-top: 1rem;
  background: none;
  border: none;
  color: var(--accent);
  font-size: .82rem;
  cursor: pointer;
  font-family: var(--font);
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.signals-list {
  margin-top: .8rem;
  display: none;
  border-top: 1px solid var(--border);
  padding-top: .8rem;
}
.signals-list.open { display: block; }

.signal-row {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  gap: .3rem .6rem;
  font-size: .78rem;
  padding: .25rem 0;
  border-bottom: 1px solid var(--border);
}
.signal-row:last-child { border-bottom: none; }

.signal-conf { font-weight: 700; color: var(--muted); }
.signal-conf.high   { color: var(--success); }
.signal-conf.medium { color: var(--warn); }
.signal-conf.low    { color: #818cf8; }

.signal-desc { color: var(--text); }

.signal-pts {
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 700;
  color: var(--muted);
  white-space: nowrap;
  align-self: center;
}

.signal-match {
  grid-column: 2;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--muted);
  word-break: break-all;
}

/* ------------------------------------------------------------------ */
/* CSV Upload                                                           */
/* ------------------------------------------------------------------ */

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(124,109,250,.05);
}

.upload-icon { font-size: 2rem; margin-bottom: .5rem; }
.upload-label { color: var(--text); font-size: .95rem; }
.upload-label .link { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.upload-hint { margin-top: .4rem; color: var(--muted); font-size: .8rem; }
.upload-hint code {
  font-family: var(--mono);
  background: var(--border);
  padding: .1rem .35rem;
  border-radius: 4px;
  font-size: .75rem;
}

.file-meta {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-top: .8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .5rem .8rem;
  font-size: .85rem;
}
#file-name { font-family: var(--mono); color: var(--text); flex: 1; }
#file-rows { color: var(--muted); white-space: nowrap; }

.batch-options {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: .3rem;
}
.batch-options label { font-size: .82rem; color: var(--muted); }
.muted { color: var(--muted); }

#btn-batch { margin-top: 1rem; width: 100%; padding: .8rem; }

/* ------------------------------------------------------------------ */
/* Progress                                                             */
/* ------------------------------------------------------------------ */

.progress-area {
  margin-top: 1.2rem;
}

.progress-bar-wrap {
  height: 6px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 99px;
  width: 0%;
  transition: width .3s ease;
}

.progress-label {
  margin-top: .5rem;
  font-size: .82rem;
  color: var(--muted);
  text-align: center;
}

/* ------------------------------------------------------------------ */
/* Batch results table                                                  */
/* ------------------------------------------------------------------ */

.batch-result {
  margin-top: 1.5rem;
}

.batch-summary {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1rem;
  font-size: .85rem;
}
.batch-summary span { color: var(--muted); }
.batch-summary strong { color: var(--text); }

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  font-family: var(--font);
  font-size: .85rem;
  padding: .5rem 1rem;
  text-decoration: none;
  margin-bottom: 1rem;
  transition: border-color .15s;
}
.download-btn:hover { border-color: var(--accent); color: var(--accent); }

.results-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
}

thead th {
  background: var(--surface);
  color: var(--muted);
  font-weight: 600;
  font-size: .75rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: .6rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

tbody tr:nth-child(even) { background: rgba(255,255,255,.015); }
tbody tr:hover { background: rgba(124,109,250,.06); }

td {
  padding: .55rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

tbody tr:last-child td { border-bottom: none; }

.td-url {
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--muted);
}

/* ------------------------------------------------------------------ */
/* Utilities                                                            */
/* ------------------------------------------------------------------ */

.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

footer {
  margin-top: 3rem;
  text-align: center;
  font-size: .75rem;
  color: var(--muted);
}

/* ------------------------------------------------------------------ */
/* Responsive                                                           */
/* ------------------------------------------------------------------ */

@media (max-width: 520px) {
  .input-row { flex-direction: column; }
  h1 { font-size: 1.6rem; }
}