/* ═══════════════════════════════════════════
   IntelliSQL — Stylesheet
   SmartBridge Generative AI Course Project
═══════════════════════════════════════════ */

:root {
  --bg:          #0f1117;
  --bg-2:        #1a1d27;
  --bg-3:        #22263a;
  --border:      #2e3350;
  --accent:      #4f8ef7;
  --accent-dim:  #1e3a6e;
  --green:       #22c55e;
  --red:         #ef4444;
  --yellow:      #f59e0b;
  --text:        #e2e8f0;
  --text-muted:  #8892a4;
  --mono:        'JetBrains Mono', monospace;
  --sans:        'Inter', sans-serif;
}

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

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── HEADER ── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.logo-icon { font-size: 22px; }

.logo-text {
  font-size: 20px;
  font-weight: 600;
  background: linear-gradient(90deg, #4f8ef7, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-badge {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 999px;
  background: #1e3a6e;
  color: #4f8ef7;
  border: 1px solid #2d5299;
}

.tagline { font-size: 13px; color: var(--text-muted); }

.header-right { display: flex; gap: 8px; }

.stat-pill {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* ── MAIN LAYOUT ── */
.main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - 80px);
}

/* ── SIDEBAR ── */
.sidebar {
  width: 240px;
  border-right: 1px solid var(--border);
  background: var(--bg-2);
  overflow-y: auto;
  flex-shrink: 0;
  padding-bottom: 20px;
}

.sidebar-header {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 14px 16px 6px;
}

.table-block { border-bottom: 1px solid var(--border); }

.table-name {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
  transition: background 0.15s;
}
.table-name:hover { background: var(--bg-3); }

.table-icon { color: var(--accent); font-size: 14px; }

.expand-icon {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 16px;
  transition: transform 0.2s;
}

.table-cols { padding: 4px 0 8px 28px; }

.col-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 12px 3px 0;
  font-size: 12px;
}

.col-name { color: var(--text-muted); font-family: var(--mono); }

.col-type {
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--bg-3);
  color: var(--yellow);
  font-family: var(--mono);
}

.loading-cols { font-size: 12px; color: var(--text-muted); padding: 4px 0; }

/* ── SAMPLE QUESTIONS ── */
.sample-questions { padding: 4px 12px; }

.sample-q {
  font-size: 12px;
  padding: 7px 10px;
  margin: 3px 0;
  border-radius: 8px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.15s;
  line-height: 1.4;
}
.sample-q:hover {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

/* ── CONTENT ── */
.content {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ── QUERY INPUT ── */
.query-box {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}

.query-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.ai-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.input-row { display: flex; gap: 12px; align-items: flex-start; }

.question-input {
  flex: 1;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--text);
  resize: none;
  outline: none;
  transition: border-color 0.2s;
  line-height: 1.5;
}
.question-input::placeholder { color: var(--text-muted); }
.question-input:focus { border-color: var(--accent); }

.run-btn {
  padding: 12px 22px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: white;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s;
}
.run-btn:hover { opacity: 0.9; }
.run-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.run-btn.loading { background: var(--bg-3); color: var(--text-muted); border: 1px solid var(--border); }

.input-hint { font-size: 11px; color: var(--text-muted); margin-top: 6px; }

/* ── SECTION HEADERS ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.section-title { font-size: 13px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

.section-actions { display: flex; align-items: center; gap: 8px; }

.icon-btn {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-3);
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--sans);
  transition: all 0.15s;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }

.row-count { font-size: 12px; color: var(--green); font-weight: 500; }

/* ── SQL EDITOR ── */
.sql-section, .results-section, .explanation-section,
.error-section, .history-section {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}

.sql-editor-wrap { position: relative; }

.sql-editor {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 13px;
  color: #a5d6ff;
  resize: vertical;
  outline: none;
  line-height: 1.7;
  transition: border-color 0.2s;
}
.sql-editor:focus { border-color: var(--accent); }

/* ── EXPLANATION ── */
.explanation-box {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: #1a2744;
  border: 1px solid #2d4a8a;
  border-radius: 10px;
  padding: 14px 16px;
}

.explanation-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }

.explanation-box p { font-size: 14px; line-height: 1.6; color: #93c5fd; }

/* ── RESULTS TABLE ── */
.table-wrap { overflow-x: auto; border-radius: 8px; border: 1px solid var(--border); }

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-family: var(--mono);
}

.results-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--bg-3);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.results-table td {
  padding: 9px 14px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.results-table tr:last-child td { border-bottom: none; }
.results-table tr:hover td { background: var(--bg-3); }

.null-val { color: var(--text-muted); font-style: italic; }

/* ── ERROR ── */
.error-box {
  background: #2d1515;
  border: 1px solid #7f1d1d;
  border-radius: 10px;
  padding: 14px 16px;
}

.error-title { font-size: 13px; font-weight: 600; color: var(--red); margin-bottom: 6px; }

.error-box p { font-size: 13px; font-family: var(--mono); color: #fca5a5; }

.error-hint { font-size: 13px; color: var(--yellow); margin-top: 8px; font-style: italic; }

/* ── HISTORY ── */
.history-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: opacity 0.15s;
}
.history-item:last-child { border-bottom: none; }
.history-item:hover { opacity: 0.75; }

.history-q { display: block; font-size: 13px; color: var(--text); margin-bottom: 4px; }

.history-sql {
  display: block;
  font-size: 11px;
  font-family: var(--mono);
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── FOOTER ── */
.footer {
  text-align: center;
  padding: 12px;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  background: var(--bg-2);
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
</style>