/* Shared sidebar panel (User + Admin + Teacher) */
:root {
  --panel-bg: #f4f7f8;
  --side-bg: #0b1f1c;
  --side-text: #cbd5e1;
  --side-active: #14b8a6;
  --side-hover: rgba(255,255,255,0.06);
  --panel-card: #ffffff;
  --panel-ink: #0f172a;
  --panel-muted: #64748b;
  --panel-line: rgba(15, 23, 42, 0.08);
  --panel-radius: 16px;
  --side-w: 260px;
}

* { box-sizing: border-box; }
body.panel-body {
  margin: 0;
  font-family: "DM Sans", system-ui, sans-serif;
  background: var(--panel-bg);
  color: var(--panel-ink);
  min-height: 100vh;
}

.panel-app {
  display: grid;
  grid-template-columns: var(--side-w) 1fr;
  min-height: 100vh;
}

/* Sidebar */
.panel-sidebar {
  background: linear-gradient(180deg, #0b1f1c 0%, #0f2924 55%, #123047 100%);
  color: #fff;
  padding: 1.1rem 0.85rem 1.25rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.side-brand {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  padding: 0.55rem 0.55rem 0.9rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-decoration: none;
  color: inherit;
}
.side-brand .mark {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, #2dd4bf, #0f766e);
  font-weight: 800; font-size: 0.85rem;
  box-shadow: 0 10px 24px rgba(20,184,166,0.25);
}
.side-brand strong { display: block; font-size: 0.92rem; line-height: 1.2; }
.side-brand small { color: #99f6e4; font-size: 0.75rem; font-weight: 600; }

.side-user {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 0.8rem 0.85rem;
}
.side-user .name { font-weight: 800; font-size: 0.95rem; }
.side-user .meta { color: var(--side-text); font-size: 0.8rem; margin-top: 0.2rem; }

.side-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.35rem;
  flex: 1;
}
.side-label {
  color: #64748b;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.75rem 0.7rem 0.35rem;
}
.side-nav a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.72rem 0.8rem;
  border-radius: 12px;
  color: var(--side-text);
  text-decoration: none;
  font-weight: 650;
  font-size: 0.92rem;
  border: 1px solid transparent;
  transition: .15s ease;
}
.side-nav a .ico {
  width: 1.35rem;
  text-align: center;
  opacity: 0.95;
}
.side-nav a:hover {
  background: var(--side-hover);
  color: #fff;
}
.side-nav a.active {
  background: rgba(20, 184, 166, 0.16);
  color: #5eead4;
  border-color: rgba(20, 184, 166, 0.25);
}
.side-footer {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 0.75rem;
  display: grid;
  gap: 0.35rem;
}
.side-footer a {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: #94a3b8;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
}
.side-footer a:hover { background: var(--side-hover); color: #fff; }
.side-footer a.danger:hover { color: #fca5a5; }

/* Main */
.panel-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.panel-topbar {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--panel-line);
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.panel-topbar h1 {
  font-size: 1.15rem;
  margin: 0;
  letter-spacing: -0.02em;
}
.panel-topbar p {
  margin: 0.15rem 0 0;
  color: var(--panel-muted);
  font-size: 0.88rem;
  font-weight: 600;
}
.panel-top-actions { display: flex; gap: 0.45rem; flex-wrap: wrap; align-items: center; }
.menu-toggle-panel {
  display: none;
  border: 1px solid var(--panel-line);
  background: #fff;
  border-radius: 10px;
  width: 40px; height: 40px;
  cursor: pointer;
}
.panel-content {
  padding: 1.25rem;
  width: min(1180px, 100%);
  margin: 0 auto;
}
.panel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
  margin-bottom: 1rem;
}
.stat-card, .panel-card {
  background: var(--panel-card);
  border: 1px solid var(--panel-line);
  border-radius: var(--panel-radius);
  padding: 1rem 1.05rem;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
}
.stat-card strong {
  display: block;
  font-size: 1.45rem;
  color: #0f766e;
  font-weight: 800;
  margin-bottom: 0.15rem;
}
.stat-card span, .panel-card p { color: var(--panel-muted); font-size: 0.92rem; }
.panel-card h3 { margin: 0 0 0.45rem; font-size: 1.02rem; }
.panel-section-title {
  margin: 1.1rem 0 0.7rem;
  font-size: 1rem;
  font-weight: 800;
}
.two-col {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 0.9rem;
}
.list-clean { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; }
.list-clean li {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--panel-line);
  font-size: 0.92rem;
  color: #334155;
  font-weight: 600;
}
.list-clean li span { color: var(--panel-muted); font-weight: 700; font-size: 0.82rem; }
.badge-soft {
  display: inline-flex;
  background: #ecfdf5;
  color: #0f766e;
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 800;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 11px; padding: 0.62rem 0.95rem; font-weight: 750; font-size: 0.9rem;
  border: 1px solid transparent; cursor: pointer; text-decoration: none; color: inherit;
}
.btn-primary { background: linear-gradient(135deg, #14b8a6, #0f766e); color: #fff; }
.btn-ghost { background: transparent; }
.btn-outline { background: #fff; border-color: var(--panel-line); }
.btn-outline:hover { border-color: rgba(15,118,110,.35); color: #0f766e; }
.panel-note {
  margin-top: 1rem;
  color: var(--panel-muted);
  font-weight: 600;
  font-size: 0.92rem;
}
.side-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(15,23,42,0.45);
  z-index: 30;
}

@media (max-width: 1100px) {
  .panel-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .panel-app { grid-template-columns: 1fr; }
  .panel-sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: min(280px, 86vw);
    z-index: 40;
    transform: translateX(-105%);
    transition: transform .2s ease;
  }
  body.side-open .panel-sidebar { transform: translateX(0); }
  body.side-open .side-overlay { display: block; }
  .menu-toggle-panel { display: inline-grid; place-items: center; }
  .panel-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .panel-grid { grid-template-columns: 1fr; }
  .panel-content { padding: 1rem 0.85rem 1.5rem; }
}

/* Login screens */
.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: linear-gradient(180deg, #ecfdf5, #f8fafc);
}
.login-card { width: min(420px, 100%); }
.login-badge {
  display: inline-block;
  background: #ecfdf5;
  color: #0f766e;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 0.55rem;
}
.muted { color: #64748b; margin: 0.35rem 0 0.9rem; }
.hint { margin-top: 0.9rem; color: #64748b; font-size: 0.88rem; }
.backlink { margin-top: 0.55rem; }
.backlink a { color: #0f766e; font-weight: 700; text-decoration: none; }
.alert-error {
  background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca;
  padding: 0.7rem 0.8rem; border-radius: 10px; font-weight: 700; margin-bottom: 0.8rem;
}
.alert-ok {
  background: #ecfdf5; color: #0f766e; border: 1px solid #a7f3d0;
  padding: 0.7rem 0.8rem; border-radius: 10px; font-weight: 700; margin-bottom: 0.8rem;
}
.stack-form { display: grid; gap: 0.7rem; }
.stack-form label, .form-grid label {
  display: grid; gap: 0.3rem; font-weight: 700; font-size: 0.9rem; color: #334155;
}
.stack-form input, .form-grid input, .stack-form select, .form-grid select {
  width: 100%; border: 1px solid #e2e8f0; border-radius: 10px; padding: 0.75rem; font: inherit;
}
.form-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem;
}
.form-grid .full { grid-column: 1 / -1; }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }

/* Tables */
.table-wrap { width: 100%; overflow: auto; border-radius: 12px; border: 1px solid var(--panel-line); }
.data-table {
  width: 100%; border-collapse: collapse; min-width: 760px; background: #fff;
}
.data-table th, .data-table td {
  padding: 0.7rem 0.75rem; border-bottom: 1px solid var(--panel-line);
  text-align: left; font-size: 0.9rem; white-space: nowrap;
}
.data-table th {
  background: #f0fdfa; color: #0f766e; font-size: 0.8rem;
  text-transform: uppercase; letter-spacing: 0.03em; font-weight: 800;
}
.data-table tr:hover td { background: #f8fafc; }
.empty-row { text-align: center !important; color: #64748b; padding: 1.2rem !important; }
.link-btn {
  display: inline-flex; padding: 0.28rem 0.55rem; border-radius: 8px;
  background: #ecfdf5; color: #0f766e; font-weight: 800; text-decoration: none; font-size: 0.8rem;
}
.link-btn:hover { background: #ccfbf1; }
.card-head {
  display: flex; align-items: center; justify-content: space-between; gap: 0.75rem;
  margin-bottom: 0.55rem; flex-wrap: wrap;
}
.card-head h3 { margin: 0; }

/* Student search — clear stacked fields (no label/input overlap) */
.search-box {
  background: #f8fafc;
  border: 1px solid var(--panel-line);
  border-radius: 14px;
  padding: 1rem 1.05rem 1.05rem;
  margin-bottom: 1rem;
}
.search-intro {
  margin: 0 0 0.85rem;
  color: #64748b;
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.45;
}
.search-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
}
.search-grid .field {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.4rem;
  min-width: 0;
}
.search-grid .field-label {
  display: block;
  font-size: 0.86rem;
  font-weight: 750;
  color: #334155;
  line-height: 1.2;
}
.search-grid input {
  display: block;
  width: 100%;
  max-width: 100%;
  border: 1px solid #dbe3ea;
  border-radius: 10px;
  padding: 0.72rem 0.8rem;
  font: inherit;
  font-size: 0.95rem;
  line-height: 1.3;
  color: #0f172a;
  background: #fff;
  box-sizing: border-box;
}
.search-grid input::placeholder { color: #94a3b8; }
.search-grid input:focus {
  outline: none;
  border-color: rgba(15,118,110,.5);
  box-shadow: 0 0 0 3px rgba(20,184,166,.14);
}
.search-actions {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  margin-top: 0.95rem;
}
.search-result-meta {
  margin-top: 0.8rem;
  font-weight: 700;
  color: #0f766e;
}
@media (max-width: 980px) {
  .search-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .search-grid { grid-template-columns: 1fr; }
}