.hea-app{max-width:420px;margin:0 auto;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:#fff;min-height:100vh;position:relative;padding-bottom:70px;-webkit-font-smoothing:antialiased;}
.hea-header{background:linear-gradient(135deg,#f59e0b,#f97316);color:#fff;padding:24px 20px 20px;text-align:center;border-radius:0 0 24px 24px;box-shadow:0 4px 20px rgba(249,115,22,0.25);}
.hea-header h2{margin:0;font-size:19px;font-weight:700;}.hea-logo-icon{font-size:36px;margin-bottom:6px;}
.hea-greeting{margin:8px 0 0;font-size:16px;opacity:0.9;}.hea-date{margin:4px 0 0;font-size:13px;opacity:0.8;}

/* Cards */
.hea-login-card,.hea-register-card{margin:24px 16px;padding:24px 20px;background:#fff;border-radius:20px;box-shadow:0 2px 20px rgba(0,0,0,0.06);border:1px solid #f3f4f6;}
.hea-login-card h3,.hea-register-card h3{font-size:20px;margin:0 0 6px;color:#111827;}
.hea-login-subtitle{font-size:14px;color:#6b7280;margin:0 0 20px;}
.hea-form-field{margin-bottom:14px;}.hea-form-field label{display:block;font-weight:600;font-size:13px;color:#374151;margin-bottom:6px;}
.hea-form-field input[type="text"],.hea-form-field input[type="email"]{width:100%;padding:13px 16px;border:2px solid #e5e7eb;border-radius:14px;font-size:15px;outline:none;background:#f9fafb;box-sizing:border-box;}
.hea-form-field input:focus{border-color:#f59e0b;background:#fff;}
.hea-input-group{display:flex;align-items:center;border:2px solid #e5e7eb;border-radius:14px;overflow:hidden;background:#f9fafb;}
.hea-input-group:focus-within{border-color:#f59e0b;background:#fff;}
.hea-input-prefix{padding:14px 12px 14px 16px;font-weight:700;color:#374151;font-size:16px;background:#f3f4f6;border-right:1px solid #e5e7eb;}
.hea-input-group input{flex:1;border:none;padding:14px 16px;font-size:17px;outline:none;background:transparent;letter-spacing:1px;}
.hea-help-text{font-size:13px;color:#9ca3af;text-align:center;margin-top:14px;}.hea-help-text a{color:#f97316;font-weight:600;text-decoration:none;}

/* PIN */
.hea-pin-inputs{display:flex;gap:10px;justify-content:center;margin:8px 0 4px;}
.hea-pin-box{width:52px;height:58px;text-align:center;font-size:24px;font-weight:700;border:2px solid #e5e7eb;border-radius:14px;outline:none;background:#f9fafb;}
.hea-pin-box:focus{border-color:#f59e0b;background:#fff;box-shadow:0 0 0 3px rgba(245,158,11,0.1);}

/* Biometric */
.hea-btn-biometric{background:linear-gradient(135deg,#1e40af,#3b82f6);color:#fff;border:none;border-radius:16px;padding:18px 20px;display:flex;align-items:center;justify-content:center;gap:12px;font-size:16px;font-weight:700;cursor:pointer;box-shadow:0 4px 15px rgba(59,130,246,0.3);width:100%;box-sizing:border-box;}
.hea-divider{display:flex;align-items:center;margin:18px 0;gap:12px;}.hea-divider::before,.hea-divider::after{content:'';flex:1;height:1px;background:#e5e7eb;}.hea-divider span{font-size:13px;color:#9ca3af;}

/* Buttons */
.hea-btn{padding:14px 24px;border-radius:14px;border:none;font-size:16px;font-weight:700;cursor:pointer;transition:all 0.2s;text-align:center;}
.hea-btn-primary{background:linear-gradient(135deg,#f59e0b,#f97316);color:#fff;box-shadow:0 4px 15px rgba(249,115,22,0.25);}
.hea-btn-primary:disabled{opacity:0.6;cursor:not-allowed;}
.hea-btn-secondary{background:#f3f4f6;color:#374151;border:1px solid #e5e7eb;}
.hea-btn-full{width:100%;display:block;margin-top:16px;box-sizing:border-box;}

/* Streak Banner */
.hea-streak-banner{display:flex;align-items:center;gap:12px;margin:16px;padding:16px 20px;background:linear-gradient(135deg,#fef3c7,#fff7ed);border-radius:16px;border:1px solid #fde68a;}
.hea-streak-fire{font-size:36px;}.hea-streak-num{font-size:28px;font-weight:800;color:#f97316;line-height:1;}.hea-streak-label{font-size:12px;color:#92400e;}
.hea-streak-reward{margin-left:auto;font-size:13px;color:#92400e;font-weight:600;}

/* Camera */
.hea-clock-in-card{padding:20px 16px;text-align:center;}.hea-clock-in-card h3{color:#f97316;font-size:18px;margin:16px 0;}
.hea-camera-wrapper{width:100%;aspect-ratio:3/4;max-height:400px;border-radius:20px;overflow:hidden;background:#111;margin:0 auto;border:3px solid #fde68a;}
#hea-camera{width:100%;height:100%;object-fit:cover;transform:scaleX(-1);}
#hea-preview{width:100%;height:100%;object-fit:cover;}
.hea-capture-btn{width:72px;height:72px;border-radius:50%;border:4px solid #f97316;background:#fff7ed;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:28px;margin:16px 0 8px;padding:0;}
#hea-retake-controls{display:flex;gap:12px;justify-content:center;margin:16px;}
#hea-retake-controls .hea-btn{flex:1;}
.hea-location-status{margin-top:12px;font-size:13px;color:#6b7280;text-align:center;}
.hea-loc-ok{color:#22c55e;font-weight:600;}.hea-loc-warn{color:#ef4444;font-weight:600;}

/* Checked In */
.hea-status-card{padding:30px 20px;text-align:center;}
.hea-checked-in{background:#f0fdf4;margin:20px 16px;border-radius:20px;border:1px solid #bbf7d0;}
.hea-status-icon{font-size:48px;color:#22c55e;width:72px;height:72px;background:#dcfce7;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:700;}
.hea-checked-in h3{color:#166534;font-size:22px;}
.hea-badge{display:inline-block;padding:4px 14px;border-radius:20px;font-size:13px;font-weight:700;}
.hea-badge-present{background:#dcfce7;color:#166534;}.hea-badge-absent{background:#fee2e2;color:#991b1b;}.hea-badge-late{background:#fef3c7;color:#92400e;}

/* Dashboard Stats */
.hea-dash-stats{display:flex;gap:12px;margin:16px;text-align:center;}
.hea-ds{flex:1;background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:14px 8px;}
.hea-ds-num{font-size:24px;font-weight:800;color:#f97316;}.hea-ds-label{font-size:11px;color:#6b7280;margin-top:2px;}

/* Student Heatmap (Trading style) */
.hea-heatmap-section{margin:0 16px 16px;}.hea-section-title{font-size:16px;font-weight:700;margin:16px 0 10px;color:#111827;}
.hea-student-heatmap{overflow-x:auto;padding-bottom:8px;}
.hea-hm-grid{display:flex;gap:4px;min-width:max-content;}
.hea-hm-month{display:flex;flex-direction:column;align-items:center;}
.hea-hm-month-label{font-size:10px;font-weight:700;color:#6b7280;margin-bottom:4px;text-transform:uppercase;}
.hea-hm-cells{display:grid;grid-template-columns:repeat(7,1fr);gap:2px;}
.hea-hm-cell{width:16px;height:16px;border-radius:3px;}
.hm-present{background:#22c55e;}.hm-absent{background:#ef4444;}.hm-late{background:#f59e0b;}.hm-gray{background:#f3f4f6;}
.hea-hm-legend-s{display:flex;gap:14px;margin:10px 16px;font-size:11px;color:#6b7280;flex-wrap:wrap;}
.hea-hm-legend-s span{display:flex;align-items:center;gap:4px;}
.hea-hm-dot{width:12px;height:12px;border-radius:3px;display:inline-block;}
.hea-hm-green{background:#22c55e;}.hea-hm-red{background:#ef4444;}.hea-hm-yellow{background:#f59e0b;}.hea-hm-gray{background:#f3f4f6;border:1px solid #e5e7eb;}

/* Rewards */
.hea-rewards-section{margin:0 16px 20px;}
.hea-rewards-track{display:flex;gap:10px;overflow-x:auto;padding-bottom:8px;}
.hea-reward-item{min-width:80px;text-align:center;padding:12px 8px;background:#f9fafb;border:2px solid #e5e7eb;border-radius:14px;flex-shrink:0;}
.hea-reward-earned{border-color:#22c55e;background:#f0fdf4;}
.hea-reward-icon{font-size:28px;margin-bottom:4px;}.hea-reward-days{font-size:13px;font-weight:700;color:#374151;}.hea-reward-name{font-size:11px;color:#6b7280;margin-top:2px;}

/* Nav */
.hea-bottom-nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:420px;background:#fff;display:flex;justify-content:space-around;padding:10px 0 14px;border-top:1px solid #f3f4f6;z-index:100;}
.hea-nav-item{display:flex;flex-direction:column;align-items:center;color:#9ca3af;text-decoration:none;font-size:11px;gap:2px;cursor:pointer;}
.hea-nav-item.active{color:#f97316;}

/* Loading & Toast */
.hea-loading{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(255,255,255,0.92);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:9999;backdrop-filter:blur(4px);}
.hea-spinner{width:16px;height:16px;border:2px solid #fde68a;border-top-color:#f97316;border-radius:50%;display:inline-block;animation:hea-spin 0.8s linear infinite;}
.hea-spinner-large{width:44px;height:44px;border:4px solid #fde68a;border-top-color:#f97316;border-radius:50%;display:inline-block;animation:hea-spin 0.7s linear infinite;}
@keyframes hea-spin{to{transform:rotate(360deg);}}
.hea-loading p{margin-top:16px;color:#f97316;font-weight:600;}
.hea-toast{position:fixed;bottom:80px;left:50%;transform:translateX(-50%);padding:12px 28px;border-radius:28px;font-size:14px;font-weight:600;z-index:10000;box-shadow:0 8px 24px rgba(0,0,0,0.1);white-space:nowrap;animation:hea-toast-in 0.3s ease;}
.hea-toast-success{background:#f0fdf4;color:#166534;border:1px solid #86efac;}
.hea-toast-error{background:#fef2f2;color:#991b1b;border:1px solid #fca5a5;}
@keyframes hea-toast-in{from{opacity:0;transform:translateX(-50%) translateY(20px);}to{opacity:1;transform:translateX(-50%) translateY(0);}}