* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Segoe UI', sans-serif;
    background: #f0f4ff;
    min-height: 100vh;
}

header {
    background: linear-gradient(135deg, #1a1a2e, #185FA5);
    color: white;
    padding: 24px 20px;
    text-align: center;
}

header h1 { font-size: 28px; font-weight: 600; }
header p { font-size: 14px; opacity: 0.8; margin-top: 4px; }

.container { max-width: 800px; margin: 0 auto; padding: 24px 16px; }

.add-subject-card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.add-subject-card h2 { font-size: 16px; margin-bottom: 12px; color: #1a1a2e; }

.form-row { display: flex; gap: 10px; flex-wrap: wrap; }

.form-row input {
    flex: 1;
    min-width: 140px;
    padding: 10px 14px;
    border: 1.5px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    outline: none;
}

.form-row input:focus { border-color: #185FA5; }

.form-row button {
    padding: 10px 24px;
    background: #185FA5;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    font-weight: 500;
}

.form-row button:hover { background: #0c447c; }

.summary-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.summary-bar.hidden { display: none; }

.summary-item {
    flex: 1;
    background: white;
    border-radius: 12px;
    padding: 14px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.summary-item span { font-size: 24px; font-weight: 600; display: block; color: #1a1a2e; }
.summary-item label { font-size: 12px; color: #888; }
.summary-item.safe span { color: #1D9E75; }
.summary-item.warning span { color: #BA7517; }
.summary-item.danger span { color: #a32d2d; }

.subject-card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    border-left: 5px solid #ccc;
}

.subject-card.safe { border-left-color: #1D9E75; }
.subject-card.warning { border-left-color: #BA7517; }
.subject-card.danger { border-left-color: #a32d2d; }
.subject-card.debar { border-left-color: #500000; background: #fff5f5; }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.card-header h3 { font-size: 16px; color: #1a1a2e; }

.delete-btn {
    background: none;
    border: none;
    color: #ccc;
    cursor: pointer;
    font-size: 16px;
    padding: 4px 8px;
}

.delete-btn:hover { color: #a32d2d; }

.attendance-bar {
    height: 8px;
    background: #f0f0f0;
    border-radius: 4px;
    margin-bottom: 8px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.bar-fill.safe { background: #1D9E75; }
.bar-fill.warning { background: #BA7517; }
.bar-fill.danger { background: #a32d2d; }
.bar-fill.debar { background: #500000; }

.percentage {
    font-size: 28px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.card-stats {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
}

.stat {
    flex: 1;
    background: #f8f9ff;
    border-radius: 8px;
    padding: 10px;
    text-align: center;
}

.stat span { font-size: 18px; font-weight: 600; display: block; color: #185FA5; }
.stat label { font-size: 11px; color: #888; }

.prediction {
    font-size: 12px;
    color: #888;
    background: #f8f9ff;
    padding: 8px 12px;
    border-radius: 8px;
}

.empty-msg {
    text-align: center;
    color: #888;
    padding: 40px;
    font-size: 15px;
}

.clear-btn {
    width: 100%;
    padding: 12px;
    margin-top: 8px;
    background: transparent;
    border: 1.5px solid #e0e0e0;
    border-radius: 8px;
    color: #888;
    cursor: pointer;
    font-size: 14px;
}

.clear-btn.hidden { display: none; }
.clear-btn:hover { border-color: #a32d2d; color: #a32d2d; }
.edit-btn {
    background: none;
    border: none;
    color: #185FA5;
    cursor: pointer;
    font-size: 16px;
    padding: 4px 8px;
    margin-right: 4px;
}

.edit-btn:hover { color: #0c447c; }