:root {
  --app-bg:       #ece8e2;
  --panel-bg:     #f5f1eb;
  --panel-rgb:    245, 241, 235;
  --canvas-bg:    #ffffff;
  --border:       #d0c9be;
  --border-light: #e3ddd5;
  --text-main:    #1d1b18;
  --text-muted:   #8a8278;
  --input-bg:     #ffffff;
  --input-border: #c8c0b5;
  --accent:       #40ECC0;
  --accent-hover: #2dd9ac;
  --accent-text:  #0a3d2e;
  --success:      #34c759;
  --warning:      #ff9f0a;
  --error:        #ff3b30;
  --shadow-pop:   0 8px 24px rgba(0,0,0,0.12);
}
html.dark {
  --app-bg:       #1a1815;
  --panel-bg:     #201e1b;
  --panel-rgb:    32, 30, 27;
  --canvas-bg:    #2b2825;
  --border:       #3c3730;
  --border-light: #2b2825;
  --text-main:    #f5f1eb;
  --text-muted:   #9a9088;
  --input-bg:     #1d1b18;
  --input-border: #3c3730;
  --accent:       #3de0b8;
  --accent-hover: #40ECC0;
  --accent-text:  #051f16;
  --success:      #30d158;
  --error:        #ff453a;
  --shadow-pop:   0 12px 32px rgba(0,0,0,0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  font-size: 13px;
  line-height: 1.4;
  background: var(--app-bg);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; border: 2px solid transparent; background-clip: content-box; }

/* ── Layout ── */
#app { display: flex; flex-direction: column; height: 100vh; }

.topbar {
  height: 48px;
  background: rgba(var(--panel-rgb), 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; padding: 0 16px; gap: 12px;
  flex-shrink: 0; z-index: 100;
}
.topbar-brand {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 17px; font-weight: 700; letter-spacing: -0.01em;
  color: var(--text-main); text-decoration: none;
}
.topbar-title {
  font-size: 13px; font-weight: 600; color: var(--text-muted);
}
.spacer { flex: 1; }
.back-link {
  font-size: 12px; color: var(--text-muted); text-decoration: none;
  display: flex; align-items: center; gap: 4px;
}
.back-link:hover { color: var(--text-main); }

.workspace {
  display: flex; flex: 1; overflow: hidden;
}

/* ── Sidebar ── */
.sidebar {
  width: 300px; min-width: 220px;
  background: var(--panel-bg);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  flex-shrink: 0;
}
.sidebar-header {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  display: flex; gap: 6px; align-items: center;
}
.sidebar-header input {
  flex: 1; font-size: 12px;
  padding: 5px 8px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 6px; color: var(--text-main);
}
.student-list {
  flex: 1; overflow-y: auto; padding: 6px;
}
.student-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
  margin-bottom: 3px;
  transition: background .1s;
}
.student-item:hover { background: var(--canvas-bg); }
.student-item.active {
  background: var(--canvas-bg);
  border-color: var(--accent);
}
.si-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--border); color: var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700; letter-spacing: .02em;
  flex-shrink: 0; transition: background .1s, color .1s;
}
.student-item.active .si-avatar { background: var(--accent); color: var(--accent-text); }
.si-info { flex: 1; min-width: 0; }
.si-name { font-size: 13px; font-weight: 600; }
.si-sub { font-size: 11px; color: var(--text-muted); display: flex; align-items: center; gap: 5px; margin-top: 2px; overflow: hidden; }
.si-sub span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── Detail panel ── */
.detail {
  flex: 1; overflow-y: auto; padding: 24px 28px;
}
.detail-empty {
  flex: 1; display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 14px;
}

.panel-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 20px; gap: 12px;
}
.panel-name {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 26px; font-weight: 700; line-height: 1.15;
}
.panel-sub { font-size: 12px; color: var(--text-muted); margin-top: 3px; }

/* ── Sections ── */
.section {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--canvas-bg);
  margin-bottom: 14px;
  overflow: hidden;
}
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-light);
}
.section-head.clickable { cursor: pointer; user-select: none; }
.section-head.clickable:hover { background: var(--panel-bg); }
.section-label {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-muted);
}
.section-chevron {
  color: var(--text-muted); transition: transform .15s; flex-shrink: 0;
}
.section-chevron.open { transform: rotate(90deg); }
.section-body { padding: 12px 14px 14px; }
.sections-grid .section-body { max-height: 280px; overflow-y: auto; }
.history-grid .section-body { max-height: 220px; overflow-y: auto; }
.section-divider { height: 1px; background: var(--border-light); margin: 0 16px; }

/* ── Form elements ── */
.field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; }
.field label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.field input, .field textarea, .field select {
  font-size: 13px; padding: 7px 10px;
  background: var(--input-bg); border: 1px solid var(--input-border);
  border-radius: 6px; color: var(--text-main);
  font-family: inherit;
}
.field textarea { min-height: 72px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(64,236,192,0.15);
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 4px;
  padding: 6px 14px; border-radius: 6px; font-size: 12px; font-weight: 600;
  cursor: pointer; border: 1px solid transparent;
  font-family: inherit; transition: background .1s, border-color .1s;
  text-decoration: none; white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-secondary {
  background: transparent; color: var(--text-main);
  border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) { background: var(--panel-bg); }
.btn-danger { background: transparent; color: var(--error); border-color: var(--error); }
.btn-sm { padding: 3px 9px; font-size: 11px; }
.btn-row { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }

/* ── History rows ── */
.hist-row {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 6px 0; border-bottom: 1px solid var(--border-light); font-size: 12px;
}
.hist-row:last-child { border-bottom: none; }
.hist-status-done { color: var(--success); font-weight: 700; }
.hist-status-pending { color: var(--text-muted); }

/* ── Link field ── */
.link-row {
  display: flex; gap: 6px; align-items: center; margin-top: 8px;
}
.link-row input {
  flex: 1; font-size: 11px; font-family: monospace;
  padding: 5px 8px; background: var(--app-bg);
  border: 1px solid var(--border); border-radius: 5px; color: var(--text-muted);
}

/* ── Badge ── */
.badge {
  font-size: 9px; font-weight: 700; letter-spacing: .04em;
  padding: 1px 6px; border-radius: 3px; flex-shrink: 0;
}
.badge-dna { background: var(--success); color: #fff; }
.badge-active { background: var(--accent); color: var(--accent-text); }
.badge-interview { background: #6366f1; color: #fff; }

/* ── Task picker ── */
.task-picker-row {
  display: flex; align-items: center; gap: 8px; margin-bottom: 4px;
}
.task-picker-row label { font-size: 12px; cursor: pointer; flex: 1; }
.task-picker-row input[type="checkbox"] { cursor: pointer; accent-color: var(--accent); }

/* ── Toast ── */
.toast-stack {
  position: fixed; bottom: 20px; right: 20px;
  display: flex; flex-direction: column; gap: 8px; z-index: 9999;
}
.toast {
  padding: 10px 16px; border-radius: 8px; font-size: 12px; font-weight: 600;
  box-shadow: var(--shadow-pop); min-width: 200px; max-width: 340px;
  animation: slideIn .2s ease;
}
.toast-success { background: var(--success); color: #fff; }
.toast-error   { background: var(--error);   color: #fff; }
.toast-info    { background: var(--canvas-bg); color: var(--text-main); border: 1px solid var(--border); }
@keyframes slideIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

[x-cloak] { display: none !important; }

/* ── Section grids ── */
.sections-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px;
}
.history-grid {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; margin-bottom: 14px;
}
.sections-grid > .section,
.history-grid > .section { margin-bottom: 0; }