/**
 * تصميم استوديو ولوحة تحكم المدرس المنفصلة (Stage 9 Teacher Studio ThreeUI Design System)
 * يدعم الاتجاهين RTL / LTR والقوالب البصرية الـ 4 والجداول الإدارية عالية الكثافة.
 */

:root {
  --bg-studio: #060911;
  --bg-panel: rgba(16, 24, 42, 0.84);
  --bg-panel-elevated: rgba(27, 38, 66, 0.92);
  --brand-primary: #4f46e5;
  --brand-secondary: #06b6d4;
  --brand-accent: #f59e0b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-panel: rgba(148, 163, 184, 0.22);
  --shadow-panel: 0 20px 44px -12px rgba(2, 6, 23, 0.85),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.14);
}

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

body {
  background-color: var(--bg-studio);
  background-image: radial-gradient(
    750px circle at 80% 10%,
    rgba(79, 70, 229, 0.18),
    transparent 65%
  );
  color: var(--text-main);
  font-family: "Cairo", "Inter", system-ui, sans-serif;
  min-height: 100vh;
  line-height: 1.6;
}

.teacher-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

@media (max-width: 920px) {
  .teacher-layout {
    grid-template-columns: 1fr;
  }
}

.teacher-sidebar {
  background: var(--bg-panel);
  border-inline-end: 1px solid var(--border-panel);
  padding: 1.5rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.teacher-main {
  padding: 1.75rem;
  max-width: 1360px;
  width: 100%;
  margin-inline: auto;
}

.studio-card {
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-panel);
  border-radius: 16px;
  box-shadow: var(--shadow-panel);
  padding: 1.35rem;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.1rem;
  margin-block-end: 1.75rem;
}

.studio-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.6rem 1.1rem;
  border-radius: 10px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  color: #ffffff;
}

.studio-btn-ghost {
  background: var(--bg-panel-elevated);
  color: var(--text-main);
}

.studio-input {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--border-panel);
  background: rgba(6, 9, 17, 0.72);
  color: var(--text-main);
  font-family: inherit;
}

.studio-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.studio-table th,
.studio-table td {
  padding: 0.75rem 0.9rem;
  border-block-end: 1px solid var(--border-panel);
  text-align: start;
}

.studio-badge {
  display: inline-flex;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  background: rgba(79, 70, 229, 0.22);
  border: 1px solid var(--border-panel);
}