/* 🌌 Background (Dark Black + Blue Glow) */
body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;

    background: radial-gradient(circle at top, #0f172a, #000000);
    height: 100vh;

    display: flex;
    justify-content: center;
    align-items: center;
}

/* 💎 Glass Container (Black Transparent) */
.container {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(20px);
    box-shadow: inset 0 0 20px rgba(255,255,255,0.02);

    padding: 25px;
    width: 380px;
    border-radius: 18px;

    border: 1px solid rgba(59, 130, 246, 0.2);

    box-shadow: 
        0 0 20px rgba(59, 130, 246, 0.2),
        0 0 60px rgba(59, 130, 246, 0.1);

    color: #e2e8f0;
}

/* 🧾 Title */
h1 {
    font-weight: 500;
    margin-bottom: 10px;
}

/* 📅 Date */
#todayDate {
    color: #60a5fa;
    margin-bottom: 10px;
}

/* 📅 Date Picker */
#selectedDate {
    width: 100%;
    padding: 10px;
    margin-bottom: 12px;

    border-radius: 10px;
    border: none;

    background: rgba(255,255,255,0.05);
    color: white;
}

/* 🔲 Input Group */
.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

/* ✏️ Input */
.input-group input {
    flex: 1;
    padding: 12px;

    border-radius: 10px;
    border: none;
    outline: none;

    background: rgba(255,255,255,0.08);
    color: white;
}

/* 📝 Notes */
textarea {
    width: 100%;
    height: 60px;

    padding: 10px;
    border-radius: 10px;

    background: rgba(255,255,255,0.08);
    color: white;

    border: none;
    resize: none;

    margin-bottom: 10px;
}

/* 🔵 Add Button (Blue Accent) */
button {
    padding: 12px;
    border: none;
    border-radius: 10px;

    background: linear-gradient(135deg, #3b82f6, #0ea5e9);
    color: white;

    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 10px #3b82f6;
}

/* 📋 Task Item */
li {
    list-style: none;
    margin: 10px 0;

    display: flex;
    justify-content: space-between;
    align-items: center;

    padding: 12px;
    border-radius: 10px;

    background: rgba(255,255,255,0.05);
    transition: 0.3s;
}

/* Hover Effect */
li:hover {
    background: rgba(59, 130, 246, 0.1);
}

/* ✅ Completed */
.completed {
    text-decoration: line-through;
    color: #64748b;
}

/* ❌ Delete Button */
li button {
    background: rgba(239, 68, 68, 0.2);
    padding: 6px 10px;
}

li button:hover {
    background: rgba(239, 68, 68, 0.5);
}