/* ========== Variables & Reset ========== */
* { box-sizing: border-box; }
:root {
  --sidebar-bg: #eef0ff;
  --sidebar-active-bg: #ffffff;
  --sidebar-text: #2b2d33;
  --sidebar-header: #4f46e5;
  --main-bg: #f5f6f8;
  --card-bg: #ffffff;
  --border: #e2e6ec;
  --border-soft: #edf0f4;
  --text-primary: #1a202c;
  --text-secondary: #58606e;
  --text-muted: #8a93a3;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef0ff;
  --danger: #e53e3e;
  --danger-hover: #c53030;
  --success: #266c26;
  --warning: #c92a2a;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
html, body {
  margin: 0; padding: 0; height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans",
               "Yu Gothic UI", "Segoe UI", "Helvetica Neue", sans-serif;
  background: var(--main-bg);
  color: var(--text-primary);
  font-size: 14px;
}
a { color: inherit; text-decoration: none; }

/* ========== Layout ========== */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  padding: 20px 12px;
  border-right: 1px solid var(--border);
}
.main {
  flex: 1;
  min-width: 0;
  padding: 24px 32px 40px;
  overflow-y: auto;
}

/* ========== Sidebar ========== */
.brand {
  color: var(--sidebar-header);
  font-weight: 700;
  font-size: 16px;
  padding: 6px 12px 18px;
}
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--sidebar-text);
  cursor: pointer;
  font-size: 14px;
  transition: background 0.1s;
}
.nav-item:hover { background: rgba(255, 255, 255, 0.6); }
.nav-item.active {
  background: var(--sidebar-active-bg);
  box-shadow: var(--shadow);
  font-weight: 600;
}
.nav-item .icon { width: 16px; height: 16px; flex-shrink: 0; }
.nav-item .label { flex: 1; }
.nav-item .chev { width: 12px; height: 12px; color: var(--text-muted); }

/* ========== Main ========== */
.page-title {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 16px;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

/* ========== Form Grid ========== */
.form-row {
  display: grid;
  grid-template-columns: 1.5fr 1.3fr 1fr 0.8fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form-row-secondary {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 2fr;
  gap: 16px;
  margin-bottom: 20px;
}
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}
.field input[type="text"],
.field input[type="number"],
.field input[type="date"] {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid #d0d5dd;
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: #fff;
  color: var(--text-primary);
}
.field input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15); }
.field input:disabled { background: #f5f6f8; color: var(--text-muted); }

/* Date range styling */
.date-range {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 4px;
  border: 1px solid #d0d5dd;
  border-radius: var(--radius-sm);
  background: #fff;
}
.date-range input[type="date"] {
  border: none;
  padding: 6px 4px;
  width: auto;
  flex: 1;
  min-width: 0;
  font-size: 13px;
}
.date-range input:focus { box-shadow: none; }
.date-range .sep { color: var(--text-muted); }
.date-range .cal-icon { color: var(--text-muted); padding-right: 6px; }

/* Upload row */
.upload-field { display: flex; flex-direction: column; gap: 6px; }
.upload-control {
  display: flex;
  align-items: center;
  gap: 8px;
}
.file-name-display {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid #d0d5dd;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text-secondary);
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-name-display.empty { color: var(--text-muted); }

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: #fff;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.1s, border-color 0.1s;
  font-family: inherit;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-secondary {
  background: #fff;
  border-color: #d0d5dd;
}
.btn-secondary:hover:not(:disabled) { background: #f5f6f8; }
.btn-danger {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
}
.btn-danger:hover:not(:disabled) { background: var(--danger-hover); border-color: var(--danger-hover); }
.btn-large {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
}
.btn-block { width: 100%; }
.icon-btn {
  background: transparent;
  border: none;
  padding: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}
.icon-btn:hover { background: var(--primary-soft); }
.icon-btn.delete:hover { background: #fff0f0; }
.icon-btn svg { width: 18px; height: 18px; }

/* ========== Table ========== */
.table-wrap { margin-top: 8px; }
table.master-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.master-table th {
  background: #f5f6f8;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.master-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: middle;
}
.master-table td.col-name { font-weight: 600; white-space: nowrap; }
.master-table td.col-cap { text-align: left; white-space: nowrap; color: var(--text-secondary); }
.master-table td.col-list { color: var(--text-secondary); }
.master-table td.col-action {
  width: 1%;
  text-align: center;
  white-space: nowrap;
}
.master-table tbody tr:hover { background: #fafbfd; }
.empty-state {
  padding: 32px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* ========== Generate button area ========== */
.generate-area {
  display: flex;
  justify-content: center;
  margin-top: 24px;
}
.generate-area .btn { min-width: 240px; }

/* ========== Status badge ========== */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  margin-left: 8px;
}
.badge.pending { background: #edf2f7; color: #4a5568; }
.badge.running { background: #ebf8ff; color: #2b6cb0; }
.badge.optimal, .badge.feasible { background: #d4ffd4; color: var(--success); }
.badge.infeasible, .badge.error, .badge.unknown, .badge.timeout {
  background: #ffe1e1; color: #9b1c1c;
}
.badge.queued { background: #fef3c7; color: #92400e; }

/* ========== Job / Result Panels ========== */
.section-title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 14px;
  color: var(--text-primary);
}
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.info-cell {
  background: #fafbfd;
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  padding: 10px 12px;
}
.info-cell .label { font-size: 11px; color: var(--text-secondary); margin-bottom: 4px; }
.info-cell .value { font-size: 15px; font-weight: 600; color: var(--text-primary); }

.result-table-wrap { max-height: 320px; overflow: auto; border: 1px solid var(--border-soft); border-radius: 6px; }
.result-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.result-table th {
  background: #fafbfd;
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-soft);
  position: sticky; top: 0;
}
.result-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-soft);
}
.changeover { color: var(--warning); font-weight: 700; }

/* ========== Modal ========== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 18, 27, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  width: min(560px, 92vw);
  max-height: 88vh;
  overflow-y: auto;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}
.modal h3 { margin: 0 0 16px; font-size: 18px; }
.modal .field { margin-bottom: 14px; }
.modal .multi-select {
  border: 1px solid #d0d5dd;
  border-radius: var(--radius-sm);
  padding: 8px;
  max-height: 160px;
  overflow-y: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 4px;
}
.multi-select label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  padding: 4px 6px;
  border-radius: 3px;
  cursor: pointer;
  color: var(--text-primary);
  font-weight: normal;
}
.multi-select label:hover { background: var(--primary-soft); }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

/* ========== Toast / status text ========== */
.status-text { font-size: 13px; color: var(--text-secondary); margin-left: 12px; }
.status-text.success { color: var(--success); }
.status-text.error { color: var(--warning); }

/* ========== Util ========== */
.hidden { display: none !important; }
.nowrap { white-space: nowrap; }
code.mono { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 12px; color: var(--text-secondary); }

/* ========== Login Screen ========== */
.login-screen {
  position: fixed;
  inset: 0;
  background: var(--sidebar-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.login-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  padding: 40px 48px;
  width: min(440px, 92vw);
}
.login-card h1 {
  text-align: center;
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 28px;
  color: var(--text-primary);
}
.login-card .field { margin-bottom: 18px; }
.login-card label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.login-card input[type="text"],
.login-card input[type="password"] {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid transparent;
  background: #f5f6f8;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-primary);
}
.login-card input::placeholder { color: var(--text-muted); }
.login-card input:focus {
  outline: none;
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}
.login-remember {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-primary);
  margin: 6px 0 22px;
  cursor: pointer;
  user-select: none;
}
.login-remember input { width: 16px; height: 16px; accent-color: var(--primary); }
.login-card .btn-primary { width: 100%; padding: 12px; font-size: 15px; font-weight: 700; }
.login-error {
  background: #fff0f0;
  color: var(--warning);
  border: 1px solid #ffd9d9;
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
  margin-bottom: 16px;
}

/* ========== Sidebar footer (logout) ========== */
.sidebar-footer {
  margin-top: 24px;
  padding-top: 12px;
  border-top: 1px solid rgba(79, 70, 229, 0.15);
}
.user-info {
  padding: 6px 12px;
  font-size: 12px;
  color: var(--text-secondary);
}
.user-info strong { color: var(--text-primary); font-weight: 600; }