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ease}.mobile-menu-btn:hover{background-color:#334155}.mobile-overlay{display:none;position:fixed;inset:0;background-color:#00000080;z-index:999}.main-content{flex:1;margin-left:280px;padding:32px;overflow-y:auto;background-color:#fff;min-height:100vh;width:calc(100% - 280px)}.content-page{width:100%;margin:0;background-color:#fff;min-height:calc(100vh - 64px)}.welcome-section{margin-bottom:32px;background-color:#fff}.welcome-section h1{font-size:2.25rem;font-weight:700;color:#1f2937;margin-bottom:8px;line-height:1.2}.welcome-section p{font-size:1.1rem;color:#6b7280;line-height:1.6;margin-bottom:0}.content-page h1{font-size:2rem;font-weight:700;color:#1f2937;margin-bottom:8px;line-height:1.2}.content-page p{font-size:1rem;color:#6b7280;margin-bottom:24px;line-height:1.5}.content-card{background-color:#fff;border-radius:8px;padding:24px;box-shadow:0 1px 3px #0000001a;border:1px solid #e5e7eb}.content-header{display:flex;justify-content:between;align-items:center;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid #e5e7eb}.content-title{font-size:1.5rem;font-weight:600;color:#1f2937;margin:0}.content-actions{display:flex;gap:12px}.btn-primary{background-color:#3b82f6;color:#fff;border:none;border-radius:6px;padding:10px 16px;font-size:14px;font-weight:500;cursor:pointer;transition:background-color .2s ease}.btn-primary:hover{background-color:#2563eb}.btn-secondary{background-color:#f3f4f6;color:#374151;border:1px solid #d1d5db;border-radius:6px;padding:10px 16px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease}.btn-secondary:hover{background-color:#e5e7eb}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:32px}.stat-card{background-color:#fff;border-radius:8px;padding:20px;box-shadow:0 1px 3px #0000001a;border:1px solid #e5e7eb}.stat-label{font-size:12px;font-weight:500;color:#6b7280;text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px}.stat-value{font-size:24px;font-weight:700;color:#1f2937;line-height:1}@media(max-width:768px){.mobile-menu-btn,.mobile-overlay{display:block}.main-content{margin-left:0;padding:80px 20px 20px}.content-page h1{font-size:1.75rem}.stats-grid{grid-template-columns:1fr;gap:16px}.content-header{flex-direction:column;align-items:stretch;gap:16px}.content-actions{justify-content:flex-start}}@media(max-width:480px){.main-content{padding:80px 16px 16px}.content-page h1{font-size:1.5rem}.stat-card{padding:16px}.content-card{padding:20px}}.department-head-dashboard{width:100%}.teacher-dashboard{width:100%}.student-dashboard{width:100%}.welcome-section{margin-bottom:32px}.welcome-section h1{font-size:2.25rem;font-weight:700;color:#1f2937;margin-bottom:8px}.welcome-section p{font-size:1.1rem;color:#6b7280;line-height:1.6}*{box-sizing:border-box;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}body{background-color:#fff}.App{width:100%;height:100%}