@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap";:root{--color-bg: #060a14;--color-bg-gradient: linear-gradient(145deg, #060a14 0%, #0a1022 50%, #080e1e 100%);--color-surface: rgba(12, 18, 35, .65);--color-surface-solid: #0c1223;--color-surface-2: rgba(16, 24, 48, .5);--color-surface-3: rgba(22, 32, 58, .5);--color-surface-elevated: rgba(16, 26, 50, .85);--color-border: rgba(255, 255, 255, .06);--color-border-hover: rgba(19, 201, 186, .35);--color-border-subtle: rgba(255, 255, 255, .03);--glass-blur: blur(20px);--glass-blur-heavy: blur(40px);--color-primary: #13C9BA;--color-primary-hover: #17dece;--color-primary-muted: #0e9a8e;--color-primary-glow: rgba(19,201,186,.18);--color-primary-rgb: 19, 201, 186;--color-accent: #7DFFE8;--color-accent-glow: rgba(125,255,232,.12);--color-secondary: #a78bfa;--color-secondary-glow: rgba(167,139,250,.15);--color-success: #22d3a7;--color-warning: #fbbf24;--color-danger: #f87171;--color-info: #60a5fa;--color-text: #f0f6f8;--color-text-secondary: #8ea8b8;--color-text-muted: #445a68;--color-student: #13C9BA;--color-teacher: #22d3a7;--color-admin: #fbbf24;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--space-16: 64px;--radius-xs: 4px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-2xl: 32px;--radius-full: 9999px;--shadow-sm: 0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);--shadow-md: 0 4px 20px rgba(0,0,0,.4);--shadow-lg: 0 12px 40px rgba(0,0,0,.5);--shadow-xl: 0 20px 60px rgba(0,0,0,.6);--shadow-primary: 0 4px 30px rgba(19,201,186,.2);--shadow-primary-lg: 0 8px 40px rgba(19,201,186,.3);--shadow-accent: 0 0 20px var(--color-accent-glow);--shadow-inset: inset 0 1px 0 rgba(255,255,255,.04);--transition: .2s cubic-bezier(.25, 1, .5, 1);--transition-slow: .4s cubic-bezier(.25, 1, .5, 1);--transition-bounce: .5s cubic-bezier(.34, 1.56, .64, 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#0000004d}.sidebar.collapsed{transform:translate(-100%)}.sidebar-toggle-btn-close{background:transparent;border:none;color:var(--color-text-muted);font-size:14px;cursor:pointer;padding:6px;border-radius:var(--radius-sm);transition:all var(--transition);width:28px;height:28px;display:flex;align-items:center;justify-content:center}.sidebar-toggle-btn-close:hover{background:#ffffff14;color:var(--color-text)}.main-content{margin-left:270px;flex:1;padding:var(--space-8) var(--space-8) var(--space-12);max-width:1200px;transition:margin-left var(--transition-spring);position:relative;min-height:100vh}.main-content.expanded{margin-left:0}.sidebar-toggle-btn-open{position:fixed;top:var(--space-4);left:var(--space-4);background:var(--color-surface-elevated);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--color-border);color:var(--color-text);width:42px;height:42px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-md);transition:all var(--transition);font-size:18px;z-index:50}.sidebar-toggle-btn-open:hover{background:var(--color-surface-2);color:var(--color-primary);border-color:var(--color-border-hover);box-shadow:var(--shadow-primary);transform:scale(1.05)}.logo{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-8);text-decoration:none}.logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:17px;box-shadow:0 0 20px #13c9ba4d;transition:box-shadow var(--transition)}.logo:hover .logo-icon{box-shadow:0 0 30px #13c9ba80}.logo-text{font-size:20px;font-weight:800;background:linear-gradient(135deg,#ffffff 30%,var(--color-primary) 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