* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

/* ===== Main Layout ===== */
body {
    background-color: #0f172a;
    color: #e5e7eb;
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 40px 24px;
    min-height: 100vh;
}

/* ===== Header ===== */
.container h1 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 32px;
    font-weight: 600;
}

.container h1 img {
    width: 42px;
}

/* ===== Button ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #6366f1;
    color: #fff;
    border: none;
    border-radius: 30px;
    padding: 14px 24px;
    margin: 28px 0;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn:hover {
    background: #4f46e5;
}

.btn img {
    width: 22px;
}

/* ===== Notes Area ===== */
.notes-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

/* ===== Note Card ===== */
.input-box {
    position: relative;
    min-height: 160px;
    background: #ffffff;
    color: #111827;
    padding: 18px;
    border-radius: 12px;
    outline: none;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

/* Delete Icon */
.input-box img {
    width: 22px;
    position: absolute;
    bottom: 14px;
    right: 14px;
    cursor: pointer;
    opacity: 0.7;
}

.input-box img:hover {
    opacity: 1;
}

/* ===== Mobile Optimization ===== */
@media (max-width: 768px) {
    .container {
        padding: 28px 18px;
    }

    .container h1 {
        font-size: 26px;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .notes-container {
        grid-template-columns: 1fr;
    }
}