:root {
    --bg-color: #f4f7f9;
    --card-bg: #ffffff;
    --text-main: #2c3e50;
    --text-muted: #7f8c8d;
    --primary-color: #3498db;
    --danger-color: #e74c3c;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --border-color: #ecf0f1;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    --border-radius: 12px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 30px;
    display: flex;
    justify-content: center;
}

.dashboard-container { width: 100%; max-width: 1000px; }

/* Header */
.header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.header h1 { margin: 0; font-size: 1.8rem; display: flex; align-items: center; gap: 10px; }
.header h1::before { content: '🩸'; font-size: 2rem; }
.status-badge { background-color: #e0f2fe; color: var(--primary-color); padding: 8px 16px; border-radius: 50px; font-weight: 600; font-size: 0.9rem; transition: 0.3s; }

/* Settings Panel */
.settings-panel { display: flex; justify-content: space-between; align-items: center; background-color: var(--card-bg); padding: 15px 25px; border-radius: var(--border-radius); box-shadow: var(--shadow); margin-bottom: 15px; }
.patient-selector label, .mode-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; margin-right: 10px; }
select { padding: 8px 12px; border-radius: 6px; border: 1px solid var(--border-color); font-family: 'Inter'; font-size: 0.9rem; outline: none; cursor: pointer; }

/* Radio Buttons */
.scan-mode { display: flex; align-items: center; gap: 10px; }
.radio-btn input { display: none; }
.radio-custom { padding: 6px 14px; background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: 50px; font-size: 0.85rem; cursor: pointer; transition: all 0.2s; color: var(--text-muted); }
.radio-btn input:checked + .radio-custom { background-color: var(--primary-color); color: white; border-color: var(--primary-color); }

/* STAT Toggle Switch */
.stat-toggle-container { display: flex; align-items: center; }
.stat-label { color: var(--warning-color) !important; text-transform: uppercase; }
.switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: var(--border-color); transition: .4s; border-radius: 34px; }
.slider:before { position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px; background-color: white; transition: .4s; border-radius: 50%; box-shadow: 0 2px 4px rgba(0,0,0,0.2); }
input:checked + .slider { background-color: var(--warning-color); }
input:checked + .slider:before { transform: translateX(20px); }

/* Patient Panel */
.patient-panel { background-color: var(--card-bg); padding: 15px 25px; border-radius: var(--border-radius); box-shadow: var(--shadow); display: flex; justify-content: space-between; margin-bottom: 30px; border-left: 5px solid var(--text-main); }
.patient-info { display: flex; flex-direction: column; }
.patient-info .label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }
.patient-info .value { font-size: 1.1rem; font-weight: 600; }

/* Controls */
.controls-wrapper { display: flex; flex-direction: column; align-items: center; margin-bottom: 40px; }
#startBtn { background-color: var(--primary-color); color: white; border: none; padding: 18px 50px; font-size: 1.3rem; font-weight: 700; border-radius: 50px; cursor: pointer; box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4); transition: all 0.3s ease; letter-spacing: 1px; width: 300px; }
#startBtn:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(52, 152, 219, 0.5); }
#startBtn:active { transform: translateY(1px); }
#startBtn.analyzing { background-color: var(--danger-color); box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.4); } 70% { box-shadow: 0 0 0 15px rgba(231, 76, 60, 0); } 100% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0); } }

.progress-container { width: 100%; max-width: 400px; height: 8px; background-color: var(--border-color); border-radius: 10px; margin-top: 20px; overflow: hidden; }
.progress-bar { height: 100%; width: 0%; background-color: var(--primary-color); transition: width 0.1s linear, background-color 0.3s; }
.progress-text { margin-top: 10px; font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }

/* Stats Grid */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-bottom: 30px; }
.stat-card { background-color: var(--card-bg); padding: 25px; border-radius: var(--border-radius); box-shadow: var(--shadow); text-align: center; position: relative; overflow: hidden; }
.stat-card::after { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background-color: var(--primary-color); opacity: 0.5; }
.stat-card h3 { margin: 0; font-size: 1rem; color: var(--text-muted); font-weight: 600; }
.stat-card .value { font-size: 2.5rem; font-weight: 700; margin: 10px 0 5px 0; color: var(--text-main); font-variant-numeric: tabular-nums; min-width: 120px; display: inline-block; }
.stat-card .unit { font-size: 0.85rem; color: var(--text-muted); }

/* Graph Area */
.chart-wrapper { background-color: var(--card-bg); padding: 25px 30px 30px 30px; border-radius: var(--border-radius); box-shadow: var(--shadow); margin-bottom: 30px; }
.chart-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; border-bottom: 1px solid var(--border-color); padding-bottom: 15px; }
.chart-header h3 { margin: 0; font-size: 1.1rem; color: var(--text-main); }
.sensor-tabs { display: flex; gap: 10px; }
.sensor-tab { background: var(--bg-color); border: 1px solid var(--border-color); padding: 6px 12px; border-radius: 6px; font-size: 0.8rem; font-family: 'Inter'; cursor: pointer; color: var(--text-muted); transition: 0.2s; font-weight: 600; }
.sensor-tab:hover { background: #e2e8f0; }
.sensor-tab.active { background: var(--text-main); color: white; border-color: var(--text-main); }
.chart-container { height: 260px; }

/* Log Table */
.log-container { background-color: var(--card-bg); padding: 25px; border-radius: var(--border-radius); box-shadow: var(--shadow); }
.log-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px;}
.log-header h2 { margin: 0; font-size: 1.2rem; }
.btn-action { background: none; border: 1px solid var(--border-color); padding: 6px 14px; border-radius: 6px; cursor: pointer; font-size: 0.85rem; color: var(--text-main); transition: 0.2s; margin-left: 8px; font-weight: 500;}
.btn-action:hover { background: var(--bg-color); }
.btn-danger:hover { color: var(--danger-color); border-color: var(--danger-color); }

.log-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.9rem; }
.log-table th { padding: 12px; background-color: var(--bg-color); color: var(--text-muted); font-weight: 600; border-radius: 6px; }
.log-table td { padding: 12px; border-bottom: 1px solid var(--border-color); color: var(--text-main); }
.log-table tr:last-child td { border-bottom: none; }

.status-ok { color: var(--success-color); background: #dcfce7; padding: 4px 8px; border-radius: 4px; font-size: 0.8rem; font-weight: 600; }
.status-aborted { color: var(--danger-color); background: #fee2e2; padding: 4px 8px; border-radius: 4px; font-size: 0.8rem; font-weight: 600; }
.badge-stat { color: var(--warning-color); background: #fef3c7; padding: 4px 8px; border-radius: 4px; font-size: 0.8rem; font-weight: 700; }

/* Toast Notification */
.toast { visibility: hidden; min-width: 250px; background-color: #333; color: #fff; text-align: center; border-radius: 8px; padding: 16px; position: fixed; z-index: 1000; left: 50%; bottom: 30px; transform: translateX(-50%); font-size: 0.9rem; font-weight: 500; box-shadow: 0 4px 15px rgba(0,0,0,0.2); transition: opacity 0.3s, bottom 0.3s; opacity: 0; }
.toast.show { visibility: visible; opacity: 1; bottom: 50px; }