:root{--color-primary: #1a73e8;--color-primary-dark: #1557b0;--color-primary-light: #4285f4;--color-success: #34a853;--color-gold: #f9ab00;--color-bg: #f0f4f8;--color-card: #ffffff;--color-text: #1e293b;--color-text-light: #64748b;--radius: 1rem;--shadow: 0 10px 40px rgba(0, 0, 0, .12)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}#root{height:100%}.loading-screen{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;background:var(--color-bg)}.spinner{width:48px;height:48px;border:4px solid rgba(26,115,232,.2);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.login-page{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1.5rem;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%)}.login-card{width:100%;max-width:360px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:2rem}.login-logo{text-align:center;margin-bottom:2rem}.login-logo h1{font-size:1.75rem;color:var(--color-primary)}.login-logo p{color:var(--color-text-light);font-size:.875rem;margin-top:.25rem}.form-group{margin-bottom:1.25rem}.form-label{display:block;font-weight:500;font-size:.875rem;margin-bottom:.5rem}.form-input{width:100%;padding:.75rem 1rem;border:2px solid #e2e8f0;border-radius:.5rem;font-size:1rem;font-family:inherit;transition:border-color .2s}.form-input:focus{outline:none;border-color:var(--color-primary)}.btn{display:block;width:100%;padding:.875rem;border:none;border-radius:.5rem;font-size:1rem;font-weight:600;font-family:inherit;cursor:pointer;transition:transform .1s,background .2s}.btn:active{transform:scale(.98)}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:disabled{opacity:.6}.login-error{background:#ea43351a;color:#ea4335;padding:.75rem 1rem;border-radius:.5rem;margin-bottom:1rem;font-size:.875rem;text-align:center}.card-page{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1rem;background:var(--color-bg)}.id-card{width:100%;max-width:380px;background:var(--color-card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;position:relative}.id-card.teacher{border:3px solid var(--color-gold)}.id-card.teacher .card-header{background:linear-gradient(135deg,var(--color-gold) 0%,#e68a00 100%)}.card-header{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);color:#fff;padding:1rem 1.25rem;display:flex;justify-content:space-between;align-items:center}.school-name{font-weight:600;font-size:.9rem}.card-type{font-size:.75rem;opacity:.9}.offline-badge{background:#fff3;padding:.25rem .5rem;border-radius:.25rem;font-size:.7rem}.card-content{padding:1.25rem}.card-top{display:flex;gap:1rem;margin-bottom:1.25rem}.photo-container{width:100px;height:120px;background:#e2e8f0;border-radius:.5rem;overflow:hidden;flex-shrink:0}.photo-container img{width:100%;height:100%;object-fit:cover}.photo-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:3rem;color:#94a3b8}.student-info{flex:1}.student-name{font-size:1.35rem;font-weight:700;line-height:1.2;margin-bottom:.5rem}.info-row{display:flex;justify-content:space-between;font-size:.875rem;margin-bottom:.25rem}.info-label{color:var(--color-text-light)}.info-value{font-weight:500}.qr-section{text-align:center;padding-top:1rem;border-top:1px solid #e2e8f0}.qr-container{position:relative;display:inline-block}.qr-code{border-radius:.5rem}.hologram-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(45deg,#1a73e81a,#fff3,#1a73e81a,#fff3,#1a73e81a);background-size:200% 200%;animation:hologram 3s linear infinite;pointer-events:none;border-radius:.5rem}@keyframes hologram{0%{background-position:0% 0%}to{background-position:200% 200%}}.qr-timer{margin-top:.75rem;font-size:.875rem;color:var(--color-text-light)}.timer-bar{width:100%;height:4px;background:#e2e8f0;border-radius:2px;overflow:hidden;margin-top:.5rem}.timer-progress{height:100%;background:var(--color-primary);transition:width 1s linear}.validity{text-align:center;padding:.75rem;background:#34a8531a;color:var(--color-success);font-size:.8rem;font-weight:500}.card-footer{padding:1rem;text-align:center}.btn-logout{background:transparent;border:1px solid #e2e8f0;color:var(--color-text-light);padding:.5rem 1rem;border-radius:.5rem;font-size:.875rem;cursor:pointer}